/[pub]/test/html-webhacc/error-description-source.xml
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revision 1.1 by wakaba, Sun Jul 1 10:02:24 2007 UTC revision 1.42 by wakaba, Sun Aug 31 13:28:12 2008 UTC
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3      xmlns:d="http://suika.fam.cx/~wakaba/archive/2007/wdcc-desc/"      xmlns:d="http://suika.fam.cx/~wakaba/archive/2007/wdcc-desc/"
4      id="error-description">      id="error-description">
5  <head>  <head>
6  <title xml:lang="en">Description of Errors &#x2014;  <base href="cc/"/>
7  Web Document Conformance Checker (BETA)</title>  <title xml:lang="en">Description of Errors &#x2014; WebHACC (β)</title>
8  <link rel="stylesheet" href="cc-style"/>  <title xml:lang="ja">誤りの説明 &#x2014; WebHACC (β)</title>
9    <link rel="stylesheet" href="../cc-style"/>
10  <link rel="license" href="#license"/>  <link rel="license" href="#license"/>
11  </head>  </head>
12  <body>  <body>
13  <h1>Description of Errors</h1>  <header>
14    <h1><a href="../cc-about"><abbr title="Web Hypertext Application Conformance Checker (β)"><img src="../icons/title" alt="WebHACC"/></abbr></a></h1>
15    <h2>Description of Errors</h2>
16    </header>
17    
18    <d:cat name="WebHACC:Title">
19      <d:text xml:lang="en">WebHACC (β)</d:text>
20    </d:cat>
21    
22    <d:cat name="WebHACC:Heading">
23      <d:text xml:lang="en">
24        <a href="../error-description#WebHACC:Heading" rel="help"><abbr title="Web Hypertext Application Conformance Checker (β)"><img src="../icons/title" alt="WebHACC"/></abbr></a>
25      </d:text>
26      <d:text xml:lang="ja">
27        <a href="../error-description#WebHACC:Heading" rel="help"><abbr title="Web ハイパーテキスト応用適合性検査器 (β)"><img src="../icons/title" alt="WebHACC"/></abbr></a>
28      </d:text>
29      <d:desc xml:lang="en">
30        <p><a href="./#input"><abbr title="Web Hypertext Application Conformance Checker">WebHACC</abbr></a>
31        is a <em>conformance checker</em> (or validator) for Web documents,
32        supporting <a href="../standards">latest Web standards</a> including
33        <a href="http://whatwg.org/html5"><abbr title="Hypertext Markup Language">HTML</abbr>5</a>,
34        <a href="urn:ietf:rfc:4287">Atom 1.0</a>,
35        <a href="http://www.w3.org/Style/CSS/current-work"><abbr title="Cascading Style Sheets">CSS</abbr>3</a>.</p>
36    
37        <p><strong><a href="./#input">Check your document</a></strong>, or
38        <a href="../cc-about">learn more about
39        <abbr title="Web Hypertext Application Conformance Checker">WebHACC</abbr></a>.</p>
40      </d:desc>
41      <d:desc xml:lang="ja">
42        <p><a href="./#input"><abbr title="Web ハイパーテキスト応用適合性検査器">WebHACC</abbr></a>
43        は、 Web 文書のための<em>適合性検査器</em> (妥当性検証器) です。
44        <a href="http://whatwg.org/html5"><abbr title="Hypertext Markup Language">HTML</abbr>5</a>、
45        <a href="urn:ietf:rfc:4287">Atom 1.0</a>、
46        <a href="http://www.w3.org/Style/CSS/current-work"><abbr title="Cascading Style Sheets">CSS</abbr>3</a>
47        などの<a href="../standards">最新の Web 標準</a>に対応しています。</p>
48    
49  <section id="html5-parse-errors">      <p><strong><a href="./#input">文書を検査する</a></strong></p>
 <h2>HTML5 Parse Errors</h2>  
50    
51  <d:item name="after head"      <p><a href="../cc-about"><abbr title="Web ハイパーテキスト応用適合性検査器">WebHACC</abbr>
52      class="parse-error">      の詳細</a></p>
53    <d:message xml:lang="en">The <code><var>$0</var></code> element cannot be    </d:desc>
54    inserted between <code>head</code> and <code>body</code> elements.</d:message>  </d:cat>
55    
56    <section id="character-encoding-layer">
57    <h2>Character Encoding Layer Errors</h2>
58    
59    <d:item name="illegal-octets-error" class="error-category-charset" level="m">
60      <d:message xml:lang="en">An illegal octet in the input stream.</d:message>
61    </d:item>
62    </section>
63    
64    <section id="html5-character-encoding">
65    <h2>HTML5 Character Encoding Errors</h2>
66    
67    <d:item name="disallowed character encoding"
68        modules="ContentChecker">
69      <d:message xml:lang="en">Character encoding <code><var>{text}</var></code>
70      is not allowed for <abbr>HTML</abbr> document.</d:message>
71    <d:desc xml:lang="en">    <d:desc xml:lang="en">
72      <p>A start tag occurs after the <code>head</code> element is closed      <p>The character encoding used for the document is not allowed
73      but before the <code>body</code> element is opened.      for <abbr>HTML</abbr> document.  The document is non‐conforming.</p>
74      </d:desc>
75    </d:item>
76    
77    <d:item name="bad character encoding"
78        modules="ContentChecker">
79      <d:message xml:lang="en">Character encoding <code><var>{text}</var></code>
80      should not be used for <abbr>HTML</abbr> document.</d:message>
81      <d:desc xml:lang="en">
82        <p>The character encoding used for the document is not recommended
83        for <abbr>HTML</abbr> document.  The document is non‐conforming
84        unless there is any good reason to use that encoding.</p>
85      </d:desc>
86    </d:item>
87    
88    <d:item name="non-utf-8 character encoding"
89        modules="ContentChecker">
90      <d:message xml:lang="en">Use of UTF-8 is encouraged (this document
91      is encoded in <code><var>{text}</var></code>).</d:message>
92      <d:desc xml:lang="en">
93        <p>Use of UTF-8 as the character encoding of the document is encouraged,
94        though the use of another character encoding is still conforming.</p>
95      </d:desc>
96    </d:item>
97    
98    <d:item name="character encoding unchecked"
99        modules="ContentChecker">
100      <d:message xml:lang="en">Conformance for character encoding requirements
101      cannot be checked, since the input is not a byte stream.</d:message>
102      <d:desc xml:lang="en">
103        <p>The conformance checker cannot detect whether the input document
104        met the requirements on character encoding, since the document
105        is not inputed as a serialized byte sequence.  The document is
106        not conforming if it is not encoded in an appropriate character
107        encoding with appropriate labeling.</p>
108      </d:desc>
109    </d:item>
110    
111    <d:item name="no character encoding declaration"
112        modules="ContentChecker">
113      <d:message xml:lang="en">There is no character encoding
114      declaration.</d:message>
115      <d:desc xml:lang="en">
116        <p>The document does not contain a character encoding
117        declaration.  Unless the character encoding is explicitly
118        specified in lower‐level protocol, e.g. in <abbr>HTTP</abbr>,
119        or is implied by <abbr>BOM</abbr>, there must be a character
120        encoding declaration.  The document is non‐conforming.</p>
121    
122        <p>The long character encoding declaration syntax
123        <code class="html bad example">&lt;meta http-equiv="Content-Type" content="text/html; charset=<var>charset-name</var>"></code>
124        is obsolete.  The new syntax is:</p>
125        <pre class="html example"><code>&lt;meta charset="<var>charset-name</var>"></code></pre>
126    
127        <p>Note that the <code>encoding</code> declaration in <abbr>XML</abbr>
128        declaration has no effect for <abbr>HTML</abbr> document.</p>
129      </d:desc>
130    </d:item>
131    
132    <d:item name="non ascii superset"
133        modules="ContentChecker">
134      <d:message xml:lang="en">No character encoding metadata is found
135      in lower‐level protocol nor is there <abbr>BOM</abbr>, while
136      character encoding <code><var>{text}</var></code>
137      is not a superset of <abbr>ASCII</abbr>.</d:message>
138      <d:desc xml:lang="en">
139        <p>The document is not labeled with character encoding name
140        in lower‐level protocol, e.g. in <abbr>HTTP</abbr>, and
141        the document is not begin with <abbr>BOM</abbr>.  In addition,
142        the character encoding of the document is not a superset of
143        <abbr>ASCII</abbr>.  The document is non‐conforming.</p>
144    
145        <p>Unless there is a <abbr>BOM</abbr>, the character encoding
146        for the document must be specified in e.g. <abbr>HTTP</abbr>‐level,
147        as:</p>
148        <pre class="http example"><code>Content-Type: text/html; charset=<var>charset-name</var></code></pre>
149    
150        <p>Existence of <abbr>HTML</abbr> character encoding declaration, i.e.
151        <code class="html example">&lt;meta charset="<var>charset-name</var>"></code>,
152        does not allow to omit <code>charset</code> parameter
153        for <abbr>HTML</abbr> document encoded in non‐<abbr>ASCII</abbr>
154        compatible encoding.</p>
155    
156        <p>Character encodings <code>Shift_JIS</code>, <code>Windows-31J</code>,
157        and <code>ISO-2022-JP</code> are <em>not</em> a superset of
158        <abbr>ASCII</abbr> for the purpose of <abbr>HTML</abbr> conformance.</p>
159      </d:desc>
160    </d:item>
161    
162    <d:item name="sniffing:chardet"
163        modules="HTML::Parser">
164      <d:message xml:lang="en">Character encoding of this document is sniffed
165      as <code><var>{text}</var></code> (Sniffed because no explicit specification
166      for the character encoding of this document is found in the transfer
167      procotol headers).</d:message>
168    </d:item>
169    
170    <d:item name="sniffing:default"
171        modules="HTML::Parser">
172      <d:message xml:lang="en">Character encoding of this document is defaulted
173      to <code><var>{text}</var></code> because no explicit specification
174      for the character encoding of this document is found in the transfer
175      procotol headers.</d:message>
176    </d:item>
177    
178    <d:item name="chardecode:fallback"
179        modules="HTML::Parser">
180      <d:message xml:lang="en">Since no decoder for the document character
181      encoding is found, decoder for the character encoding
182      <code><var>{text}</var></code> is used.  Checking results might be
183      <em>wrong</em>.</d:message>
184    </d:item>
185    
186    <d:item name="chardecode:no error"
187        modules="HTML::Parser">
188      <d:message xml:lang="en">Conformance error checking for the character
189      encoding <code><var>{text}</var></code> is not supported.</d:message>
190    </d:item>
191    
192    <d:item name="charset label:matching"
193        modules="HTML::Parser">
194      <d:message xml:lang="en">Sniffed character encoding
195      <code><var>{text}</var></code> is same as the character encoding specified
196      in the character encoding declaration.  This is <em>not</em> an
197      error.</d:message>
198    </d:item>
199    
200    <d:item name="charset label detected"
201        modules="HTML::Parser">
202      <d:message xml:lang="en">While parsing the document as
203      <code><var>{text}</var></code>, a character encoding declaration specifying
204      a different character encoding is found.  The document
205      is reparsed.</d:message>
206      <d:desc xml:lang="en">
207        <p>While parsing a document in a character encoding,
208        a character encoding declaration which declares the character
209        encoding of the document as another character encoding is found.
210        The occurence of this warning itself does not make the document
211        non‐conforming.  However, the failure of the first attempt to
212        to detect the character encoding might be a result of non‐conformance
213        of the document.</p>
214    
215        <p>The document will be reparsed from the beginning.  Some error
216        or warning might be reported again.</p>
217    
218        <p>These are suggestions to avoid this warning:</p>
219        <ul>
220        <li>Specify <code>charset</code> parameter in the <code>Content-Type</code>
221        field in the <abbr>HTTP</abbr> header, as:
222        <pre class="HTTP example"><code>Content-Type: text/html; charset="<var>charset-name</var>"</code></pre></li>
223        <li>Put the character encoding declaration
224        (<code class="html example">&lt;meta charset="<var>charset-name</var>"></code>)
225        just after <code class="html example">&lt;head></code> start tag.</li>
226        <li>Use <code>UTF-8</code>.</li>
227        </ul>
228      </d:desc>
229    </d:item>
230    
231    <d:item name="NULL"
232        modules="HTML::Parser">
233      <d:message xml:lang="en">The <code class="charname">NULL</code> character
234      is not allowed.</d:message>
235    </d:item>
236    
237    <d:item name="control char"
238        modules="HTML::Parser">
239      <d:message xml:lang="en">Code point <code><var>{text}</var></code> is
240      not allowed.</d:message>
241    </d:item>
242    
243    </section>
244    
245    <section id="html5-tokenize-error">
246    <h2>HTML5 Parse Errors in Tokenization Stage</h2>
247    
248    <d:item name="bad attribute name"
249        modules="HTML::Parser">
250      <d:message xml:lang="en">Attribute name cannot contain characters
251      <code>"</code>, <code>'</code>, and <code>=</code>.</d:message>
252    </d:item>
253    
254    <d:item name="bad attribute value"
255        modules="HTML::Parser">
256      <d:message xml:lang="en">Attribute value must be quoted by <code>"</code>
257      or <code>'</code> if it contains a <code>"</code>, <code>'</code>, or
258      <code>=</code> character.</d:message>
259      <d:desc xml:lang="en">
260        <p>In an unquoted attribute value, a character <code>"</code>
261        (<code>U+0022</code> <code class="charname">QUOTATION MARK</code>),
262        <code>'</code> (<code>U+0026</code>
263        <code class="charname">APOSTROPHE</code>), or <code>=</code>
264        (<code>U+003D</code> <code class="charname">EQUAL SIGN</code>)
265        is contained.  These characters are not allowed in unquoted attribute
266        values, since they are used to quote attribute values or to separate
267        attribute name and value.</p>
268    
269        <p>This error is also raised if one try to use empty attribute
270        value like <code class="html bad example">&lt;foo bar= baz=></code>;
271        in this example, <code class="html bad example">baz=</code> is
272        treated as an invalid attribute value for the attribute
273        <code class="html bad example">bar</code>, not as another attribute.</p>
274      </d:desc>
275    </d:item>
276    
277    <d:item name="bare ero"
278        modules="HTML::Parser">
279      <d:message xml:lang="en">The <code>&amp;</code> character must
280      be escaped as <code class="html example">&amp;amp;</code>.</d:message>
281      <d:desc xml:lang="en">
282        <p>An <code>&amp;</code> character which
283        is not part of any reference appears in the input stream.
284        The document is non‐conforming.</p>
285    
286        <p><em>Any <code>&amp;</code> character in URI (or IRI)
287        must be escaped as <code class="example">&amp;amp;</code>.</em></p>
288    
289        <p>The <code>&amp;</code> character must
290        be the first character of a reference:
291          <dl class="switch">
292          <dt>Named entity reference</dt>
293              <dd><pre class="html example"><code>&amp;<var>entity-name</var>;</code></pre>
294              where <var>entity-name</var> is the name of the
295              character entity to be referenced.</dd>
296          <dt>Numeric character reference</dt>
297              <dd><pre class="html example"><code>&amp;#<var>d</var>;</code></pre>
298              where <var>d</var> is the decimal representation of
299              the code position of the character to be referenced.</dd>
300          <dt>Hexadecimal character reference</dt>
301              <dd><pre class="html example"><code>&amp;#x<var>h</var>;</code></pre>
302              where <var>h</var> is the hexadecimal representation
303              of the code position of the character to be referenced.</dd>
304          </dl>
305        </p>
306    
307        <p>To represent <code>&amp;</code> as a data character, use
308        named entity reference:
309          <pre class="html example"><code>&amp;amp;</code></pre>
310        </p>
311      </d:desc>
312    </d:item>
313    
314    <d:item name="bare etago"
315        modules="HTML::Parser">
316      <d:message xml:lang="en">A <code>&lt;/</code> string is not followed
317      by a tag name.</d:message><!-- </ EOF -->
318      <d:desc xml:lang="en">
319        <p>There is a <code>&lt;</code> (<code>U+003C</code>
320        <code class="charname">LESS-THAN SIGN</code>) character
321        immediately followed by a <code>/</code> (<code>U+005F</code>
322        <code>SOLIDUS</code>) character, which is not part
323        of any end tag, in the input stream.  The document
324        is non-conforming.</p>
325    
326        <p>The <code>&lt;/</code> sequence immediately followed
327        by an <abbr title="End of file pseudo-character">EOF</abbr> is
328        interpreted as a string data of <code>&lt;/</code>.</p>
329    
330        <p>The <code>&lt;/</code> sequence as string data must
331        be escaped as:
332        <pre class="html example"><code>&amp;lt;/</code></pre>
333        </p>
334      </d:desc>
335    </d:item>
336    
337    <d:item name="bare stago"
338        modules="HTML::Parser">
339      <d:message xml:lang="en">A <code>&lt;</code> character is not followed
340      by tag name or by a <code>!</code> character.</d:message>
341      <d:desc xml:lang="en">
342        <p>A <code>&lt;</code> (<code>U+003C</code>
343        <code class="charname">LESS-THAN SIGN</code>) character which is not part
344        of any markup appears in the input stream.</p>
345    
346        <p>The <code>&lt;</code> character as a data character must
347        be escaped as:
348        <pre class="html example"><code>&amp;lt;</code></pre>
349        </p>
350      </d:desc>
351    </d:item>
352    
353    <d:item name="bare nero"
354        modules="HTML::Parser">
355      <d:message xml:lang="en">The decimal representation of the code position
356      of a character must be specified after <code>&amp;#</code>.</d:message>
357      <d:desc xml:lang="en">
358        <p>An <code>&amp;</code> (<code>U+0026</code>
359        <code class="charname">AMPERSAND</code>) character immediately
360        followed by a <code>#</code> (<code>U+0023</code>
361        <code>NUMBER SIGN</code>) character which
362        is not part of any reference appears in the input stream.
363      The document is non-conforming.</p>      The document is non-conforming.</p>
364    
365        <p>The string <code>&amp;#</code> must be the first two characters
366        of a reference:
367          <dl class="switch">
368          <dt>Numeric character reference</dt>
369              <dd><pre class="html example"><code>&amp;#<var>d</var>;</code></pre>
370              where <var>d</var> is the decimal representation of
371              the code point of the character to be referenced.</dd>
372          <dt>Hexadecimal character reference</dt>
373              <dd><pre class="html example"><code>&amp;#x<var>h</var>;</code></pre>
374              where <var>h</var> is the hexadecimal representation
375              of the code point of the character to be referenced.</dd>
376          </dl>
377        </p>
378    
379        <p>To represent <code>&amp;#</code> as data characters, use
380        a named entity reference for the <code>&amp;</code> character:
381          <pre class="html example"><code>&amp;amp;#</code></pre>
382        </p>
383      </d:desc>
384    </d:item>
385    
386    <d:item name="bare hcro"
387        modules="HTML::Parser">
388      <d:message xml:lang="en">The hexadecimal representation of the code position
389      of a character must be specified after <code>&amp;#x</code>.</d:message>
390      <d:desc xml:lang="en">
391       <p>The string <code>&amp;#x</code> or <code>&amp;#X</code> which
392       is not part of any reference appears in the input stream.
393        The document is non-conforming.</p>
394    
395        <p>The string <code>&amp;#x</code> or <code>&amp;#X</code> must
396        be the first three characters of a hexadecimal reference:
397          <pre class="html example"><code>&amp;#x<var>h</var>;</code></pre>
398        where <var>h</var> is the hexadecimal representation
399        of the code point of the character to be referenced.</p>
400    
401        <p>To represent <code>&amp;#x</code> as data characters, use
402        a named entity reference for the <code>&amp;</code> character:
403          <pre class="html example"><code>&amp;amp;#x</code></pre>
404        </p>
405      </d:desc>
406    </d:item>
407    
408    <d:item name="bogus comment"
409        modules="HTML::Parser">
410      <d:message xml:lang="en">String <code>&lt;!</code> is not followed
411      by <code>--</code>.</d:message>
412      <d:desc xml:lang="en">
413        <p>There is a <code>&lt;</code> (<code>U+003C</code>
414        <code class="charname">LESS-THAN SIGN</code>) character
415        followed by a <code>!</code> (<code>U+0021</code>
416        <code class="charname">EXCLAMATION MARK</code>) character,
417        which is not followed by a <code>--</code> or
418        <code>!DOCTYPE</code>.  The document is non-conforming.</p>
419    
420        <dl class="switch">
421        <dt>Comments</dt>
422          <dd>In HTML document, comments must be introduced by
423          <code class="example">&lt;!--</code> (<code>&lt;!</code>
424          <em>immediately</em> followed
425          by <em>two</em> <code>-</code>s) and must be terminated by
426          <code class="example">--></code>.
427          Strings <code>&lt;!</code> not followed
428          by <code>--</code> and <code>&lt;!-</code> not followed by
429          <code>-</code> are not valid open delimiters for comments.</dd>
430        <dt>Marked sections, including <code>CDATA</code> sections</dt>
431          <dd>Marked sections are not allowed in HTML document.</dd>
432        <dt>Markup declarations</dt>
433          <dd>Markup declarations, except for <code>DOCTYPE</code>
434          and comment declarations, are not allowed in HTML document.</dd>
435        <dt>String <code>&lt;!</code></dt>
436          <dd>String <code>&lt;!</code> must be escaped as
437          <code class="example">&amp;lt;!</code>.</dd>
438        </dl>
439      </d:desc>
440    </d:item>
441    
442    <d:item name="bogus end tag"
443        modules="HTML::Parser">
444      <d:message xml:lang="en">String <code>&lt;/</code> is not followed
445      by tag name.</d:message><!-- </ non-name-start-char-non-EOF -->
446      <d:desc xml:lang="en">
447        <p>There is a <code>&lt;</code> (<code>U+003C</code>
448        <code class="charname">LESS-THAN SIGN</code>) character
449        immediately followed by a <code>/</code> (<code>U+005F</code>
450        <code>SOLIDUS</code>) character, which is not part
451        of any end tag, in the input stream.  The document
452        is non-conforming.</p>
453    
454        <p>The <code>&lt;/</code> sequence not followed by a
455        tag name is parsed as an opening of bogus comment.</p>
456    
457        <p>The <code>&lt;/</code> sequence as string data must
458        be escaped as:
459        <pre class="html example"><code>&amp;lt;/</code></pre>
460        </p>
461      </d:desc>
462    </d:item>
463    
464    <d:item name="C1 character reference"
465        modules="HTML::Parser">
466      <d:message xml:lang="en">Character reference to
467      <code><var>{text}</var></code> is not allowed.</d:message>
468    </d:item>
469    
470    <d:item name="CR character reference"
471        modules="HTML::Parser">
472      <d:message xml:lang="en">Character reference to
473      <code>U+000D</code> (<code class="charname">CARRIAGE RETURN</code>)
474      is not allowed.</d:message>
475    </d:item>
476    
477    <d:item name="dash in comment"
478        modules="HTML::Parser">
479      <d:message xml:lang="en">There is a <code>--</code> sequence
480      in a comment.</d:message>
481      <d:desc xml:lang="en">
482        <p>There is a <code>-</code> (<code>U+002D</code>
483        <code class="charname">HYPHEN-MINUS</code>) character
484        at the end of the comment or a <code>--</code> sequence
485        in the comment.  The document is non-conforming.</p>
486    
487        <p>Comments cannot contain a string <code>--</code>, as in XML.
488        Unlike SGML, there cannot be more than one comments
489        (where <i>comment</i> is an SGML term) in the comment
490        declaration.</p>
491    </d:desc>    </d:desc>
492  </d:item>  </d:item>
493    
494  <d:item name="duplicate attribute"  <d:item name="duplicate attribute"
495      class="tokenize-error">      modules="HTML::Parser">
496    <d:message xml:lang="en">There are two attributes with same name.</d:message>    <d:message xml:lang="en">There are two attributes with name
497          <code><var>{text}</var></code>.</d:message>
498    <d:desc xml:lang="en">    <d:desc xml:lang="en">
499      <p>Attributes must be unique in an element.  Specifying      <p>There are more than one attributes with the same
500      attributes with same name more than once is non-conforming.</p>      name in a tag.  The document is non-conforming.</p>
501    
502      <p>The <code>motion</code> attribute is not part of the HTML standard.      <p>The <code>motion</code> attribute is not part of the HTML standard.
503      Use <code>img</code> element with animation GIF instead.</p>      Use <code>img</code> element with animation GIF instead.</p>
504    </d:desc>    </d:desc>
505  </d:item>  </d:item>
506    
507    <d:item name="empty start tag"
508        modules="HTML::Parser">
509      <d:message xml:lang="en">Empty start tag (<code>&lt;></code>) is not
510      allowed.</d:message>
511    </d:item>
512    
513    <d:item name="empty end tag"
514        modules="HTML::Parser">
515      <d:message xml:lang="en">Empty end tag (<code>&lt;/></code>) is not
516      allowed.</d:message>
517    </d:item>
518    
519    <d:item name="end tag attribute"
520        modules="HTML::Parser">
521      <d:message xml:lang="en">End tag cannot have attributes.</d:message>
522      <d:message xml:lang="ja">終了タグに属性が指定されています。</d:message>
523    </d:item>
524    
525    <d:item name="empty unquoted attribute value"
526        modules="HTML::Parser">
527      <d:message xml:lang="en">Attribute value is not specified.</d:message>
528      <d:message xml:lang="ja">属性値が指定されていません。</d:message>
529      <d:desc xml:lang="en">
530        <p>The attribute value is not specified after the <code>=</code>
531        (<code>U+003C</code> <code class="charname">EQUAL SIGN</code>)
532        character.</p>
533    
534        <p>When an attribute value is empty, the <code>=</code> character after
535        the attribute name must be specified as:</p>
536    
537        <p><code class="html example">&lt;foo bar></code></p>
538    
539        <p>Instead, quotation marks can be used to explicitly represent that
540        the attribute value is empty, as:</p>
541    
542        <p><code class="html example">&lt;foo bar=""></code></p>
543    
544        <p>... or like:</p>
545    
546        <p><code class="html example">&lt;foo bar=''></code></p>
547      </d:desc>
548    </d:item>
549    
550    <d:item name="invalid character reference"
551        modules="HTML::Parser">
552      <d:message xml:lang="en">Character reference to
553      <code><var>{text}</var></code> is not allowed.</d:message>
554    </d:item>
555    
556  <d:item name="nestc"  <d:item name="nestc"
557      class="tokenize-error">      modules="HTML::Parser">
558    <d:message xml:lang="en">Void element syntax (<code>/></code>) cannot be    <d:message xml:lang="en">Polytheistic slash (<code>/></code>) cannot be
559    used for this element.</d:message>    used for this element.</d:message>
560    <d:desc xml:lang="en">    <d:desc xml:lang="en">
561      <p>The void element syntax <code>/></code> syntax can only be      <p>Polytheistic slash (<code>/></code>) must not be used
562        for the element.  The document is non-conforming.</p>
563    
564        <p>The polytheistic slash can only be
565      used for <code>base</code>, <code>link</code>, <code>meta</code>,      used for <code>base</code>, <code>link</code>, <code>meta</code>,
566      <code>hr</code>, <code>br</code>, <code>img</code>,      <code>hr</code>, <code>br</code>, <code>img</code>,
567      <code>embed</code>, <code>param</code>, <code>area</code>,      <code>embed</code>, <code>param</code>, <code>area</code>,
568      <code>col</code>, and <code>input</code> elements.      <code>col</code>, and <code>input</code> elements.</p>
     For any other elements, using that syntax is non-conforming.</p>  
569    
570      <p>Unlike XML, the void element syntax (<code>/></code>) has      <dl class="switch">
571        <dt><code>&lt;script/></code></dt>
572            <dd><p>The polytheistic slash cannot be used for <code>script</code>
573            element.  Even for an empty <code>script</code> element,
574            there must be an explicit end tag
575            <code class="html example">&lt;/script></code>.</p>
576    
577            <p><strong>NOTE</strong>: Though some user agents interpret
578            polytheistic slash for <code>script</code> element as the
579            closing of the element, such usage is not allowed under
580            the current standard.</p></dd>
581        <dt><code>&lt;basefont/></code>, <code>&lt;bgsound/></code>,
582        <code>&lt;frame/></code>, <code>&lt;keygen/></code>,
583        <code>&lt;spacer/></code>, <code>&lt;wbr/></code></dt>
584            <dd>These elements are themselves non-conforming.</dd>
585        <!-- isindex, image -->
586        <dt><code>&lt;command/></code>, <code>&lt;event-source/></code>,
587        <code>&lt;nest/></code>, or <code>&lt;source/></code></dt>
588            <dd>Future revision of HTML5 parsing algorithm is expected
589            to allow polytheistic slash for these elements.</dd>
590        <dt><code>&lt;a/></code>, <code>&lt;p/></code></dt>
591            <dd>These elements are not always empty and therefore
592            polytheistic slash is not allowed.  Use explicit end tag
593            to represent empty element as:
594              <pre class="example html"><code>&lt;p>&lt;/p></code></pre>
595            </dd>
596        </dl>
597    
598        <p>Note that, unlike in XML, the polytheistic slash has
599      no effect in HTML.</p>      no effect in HTML.</p>
600    </d:desc>    </d:desc>
601  </d:item>  </d:item>
602    
603    <d:item name="no DOCTYPE name"
604        modules="HTML::Parser">
605      <d:message xml:lang="en">After the string <code>&lt;!DOCTYPE </code>, the
606      document type name must be specified.</d:message>
607    </d:item>
608    
609    <d:item name="no PUBLIC literal"
610        modules="HTML::Parser">
611      <d:message xml:lang="en">After the keyword <code>PUBLIC</code>, no
612      oublic identifier is specified.</d:message>
613    </d:item>
614    
615    <d:item name="no refc"
616        modules="HTML::Parser">
617      <d:message xml:lang="en">Character reference must be closed by a
618      <code>;</code> character.</d:message>
619    </d:item>
620    
621    <d:item name="no space before DOCTYPE name"
622        modules="HTML::Parser">
623      <d:message xml:lang="en">After the string <code>&lt;!DOCTYPE</code>, there
624      must be at least a white space character before the document type
625      name.</d:message>
626    </d:item>
627    
628    <d:item name="no space between attributes"
629        modules="HTML::Parser">
630      <d:message xml:lang="en">Attributes must be separeted by at least a
631      white space character.</d:message>
632    </d:item>
633    
634    <d:item name="no SYSTEM literal"
635        modules="HTML::Parser">
636      <d:message xml:lang="en">After the keyword <code>SYSTEM</code>, no
637      system identifier is specified.</d:message>
638    </d:item>
639    
640    <d:item name="pio"
641        modules="HTML::Parser">
642      <d:message xml:lang="en">Processing instruction
643      (<code>&lt;?<var>...</var>></code>) is not allowed in HTML
644      document.</d:message>
645      <d:desc xml:lang="en">
646        <p>Processing instructions (<code>&lt;?<var>...</var>?></code>),
647        including XML declaration (<code>&lt;?xml <var>...</var>?></code>)
648        and XML style sheet <abbr title="processing instruction">PI</abbr>
649        (<code>&lt;?xml-stylesheet <var>...</var>?></code>), are not allowed
650        in the HTML syntax.  The document is non-conforming.</p>
651    
652        <dl class="switch">
653        <dt><code>&lt;?xbl?></code> (<abbr>XBL</abbr> Association)</dt>
654          <dd>An <abbr>XBL</abbr> binding cannot be associated by
655          <abbr title="processing instruction">PI</abbr> in <abbr>HTML</abbr>
656          document.  Use <code>binding</code> property in <abbr>CSS</abbr>
657          style sheet as:
658            <pre class="html example"><code>&lt;style>
659    p {
660      binding: url(binding.xbl);
661    }
662    &lt;/style></code></pre>
663          </dd>
664        <dt><code>&lt;?xml?&gt;</code> (XML declaration)</dt>
665            <dd>XML declaration is unnecessary for HTML documents.</dd>
666        <dt><code>&lt;?xml-stylesheet?></code> (XML style sheet
667        <abbr title="processing instruction">PI</abbr>)</dt>
668            <dd>Use HTML <code>link</code> element with <code>rel</code>
669            attribute set to <code>stylesheet</code> (or,
670            <code>alternate stylesheet</code> for an alternate style
671            sheet).
672              <pre class="example html"><code>&lt;link rel=stylesheet href="path/to/stylesheet.css"></code></pre>
673            </dd>
674        <dt><code>&lt;?php?&gt;</code> or
675        <code>&lt;? <var>... <abbr>PHP</abbr> code ...</var> ?&gt;</code>
676        (<abbr>PHP</abbr> code)</dt>
677            <dd>The conformance checker does <em>not</em> support
678            checking for PHP source documents.</dd>
679        <dt>Other processing instructions</dt>
680            <dd>Processing instructions cannot be inserted in an HTML
681            document.  Use XML document or insert
682            <code>ProcessingInstruction</code> node by scripting.</dd>
683        </dl>
684    
685        <p>Web browsers will parse processing instructions as bogus
686        comments.  Some legacy Web browsers, such as IE:mac and
687        some mobile Web browsers, will display processing instructions
688        as string.</p>
689      </d:desc>
690    </d:item>
691    
692    <d:item name="string after DOCTYPE name"
693        modules="HTML::Parser">
694      <d:message xml:lang="en">There is a bogus string after the document type
695      name.</d:message>
696    </d:item>
697    
698    <d:item name="string after PUBLIC"
699        modules="HTML::Parser">
700      <d:message xml:lang="en">There is a bogus string after the keyword
701      <code>PUBLIC</code>.</d:message>
702    </d:item>
703    
704    <d:item name="string after PUBLIC literal"
705        modules="HTML::Parser">
706      <d:message xml:lang="en">There is a bogus string after the public
707      identifier.</d:message>
708    </d:item>
709    
710    <d:item name="string after SYSTEM"
711        modules="HTML::Parser">
712      <d:message xml:lang="en">There is a bogus string after the keyword
713      <code>SYSTEM</code>.</d:message>
714    </d:item>
715    
716    <d:item name="string after SYSTEM literal"
717        modules="HTML::Parser">
718      <d:message xml:lang="en">There is a bogus string after the system
719      identifier.</d:message>
720    </d:item>
721    
722    <d:item name="unclosed attribute value"
723        modules="HTML::Parser">
724      <d:message xml:lang="en">Attribute value is not closed by a quotation
725      mark.</d:message>
726    </d:item>
727    
728    <d:item name="unclosed comment"
729        modules="HTML::Parser">
730      <d:message xml:lang="en">Comment is not closed by a string
731      <code>--></code>.</d:message>
732    </d:item>
733    
734    <d:item name="unclosed DOCTYPE"
735        modules="HTML::Parser">
736      <d:message xml:lang="en">The <code>DOCTYPE</code> is not closed by a
737      <code>></code> character.</d:message>
738    </d:item>
739    
740    <d:item name="unclosed PUBLIC literal"
741        modules="HTML::Parser">
742      <d:message xml:lang="en">The public identifier literal is not closed by a
743      quotation mark.</d:message>
744    </d:item>
745    
746    <d:item name="unclosed SYSTEM literal"
747        modules="HTML::Parser">
748      <d:message xml:lang="en">The system identifier literal is not closed by a
749      quotation mark.</d:message>
750    </d:item>
751    
752    <d:item name="unclosed tag"
753        modules="HTML::Parser">
754      <d:message xml:lang="en">Tag is not closed by a <code>></code>
755      character.</d:message>
756    </d:item>
757    
758    </section>
759    
760    <section id="html5-parse-errors">
761    <h2>HTML5 Parse Errors in Tree Construction Stage</h2>
762    
763    <d:item name="after after frameset"
764        modules="HTML::Parser">
765      <d:message xml:lang="en">There is a start tag
766      <code>&lt;<var>{text}</var>></code> is after the <code>html</code> element
767      is closed.</d:message>
768      <d:message xml:lang="ja"><code>html</code> 要素が閉じられた後に開始タグ
769      <code>&lt;<var>{text}</var>></code> があります。</d:message>
770    </d:item>
771    
772    <d:item name="after after frameset:/"
773        modules="HTML::Parser">
774      <d:message xml:lang="en">There is an end tag
775      <code>&lt;/<var>{text}</var>></code> is after the <code>html</code> element
776      is closed.</d:message>
777      <d:message xml:lang="ja"><code>html</code> 要素が閉じられた後に終了タグ
778      <code>&lt;/<var>{text}</var>></code> があります。</d:message>
779    </d:item>
780    
781    <d:item name="after body"
782        modules="HTML::Parser">
783      <d:message xml:lang="en">Start tag <code>&lt;<var>{text}</var>></code> is
784      not allowed after the <code>body</code> is closed.</d:message>
785    </d:item>
786    
787    <d:item name="after body:/"
788        modules="HTML::Parser">
789      <d:message xml:lang="en">End tag <code>&lt;/<var>{text}</var>></code> is
790      not allowed after the <code>body</code> is closed.</d:message>
791    </d:item>
792    
793    <d:item name="after body:#text"
794        modules="HTML::Parser">
795      <d:message xml:lang="en">Non‐white‐space characters are not allowed
796      after the <code>body</code> is closed.</d:message>
797    </d:item>
798    
799    <d:item name="after frameset"
800        modules="HTML::Parser">
801      <d:message xml:lang="en">Start tag <code>&lt;<var>{text}</var>></code> is
802      not allowed after the <code>frameset</code> is closed.</d:message>
803    </d:item>
804    
805    <d:item name="after frameset:/"
806        modules="HTML::Parser">
807      <d:message xml:lang="en">End tag <code>&lt;/<var>{text}</var>></code> is
808      not allowed after the <code>frameset</code> is closed.</d:message>
809    </d:item>
810    
811    <d:item name="after frameset:#text"
812        modules="HTML::Parser">
813      <d:message xml:lang="en">Non‐white‐space characters are not allowed
814      after the <code>frame</code> is closed.</d:message>
815    </d:item>
816    
817    <d:item name="after head"
818        modules="HTML::Parser">
819      <d:message xml:lang="en">The <code><var>{text}</var></code> element cannot be
820      inserted between <code>head</code> and <code>body</code>
821      elements.</d:message>
822      <d:desc xml:lang="en">
823        <p>A start tag appears after the <code>head</code> element is closed
824        but before the <code>body</code> element is opened.
825        The document is non-conforming.</p>
826      </d:desc>
827    </d:item>
828    
829    <d:item name="after html"
830        modules="HTML::Parser">
831      <d:message xml:lang="en">Start tag <code>&lt;<var>{text}</var>></code> is
832      not allowed after the <code>html</code> is closed.</d:message>
833      <d:desc xml:lang="en">
834        <p>The start tag of an element appears after the
835        <code>body</code> element has been closed.  The document is
836        non-conforming.</p>
837    
838        <p>Any content of the document other than <code>head</code>
839        contents and comments must be put into the <code>body</code>
840        element.</p>
841      </d:desc>
842    </d:item>
843    
844    <d:item name="after html:/"
845        modules="HTML::Parser">
846      <d:message xml:lang="en">End tag <code>&lt;/<var>{text}</var>></code> is
847      not allowed after the <code>html</code> is closed.</d:message>
848      <d:desc xml:lang="en">
849        <p>The end tag of an element appears after the
850        <code>body</code> element has been closed.  The document is
851        non-conforming.</p>
852    
853        <p>Any content of the document other than <code>head</code>
854        contents and comments must be put into the <code>body</code>
855        element.</p>
856      </d:desc>
857    </d:item>
858    
859    <d:item name="after html:#text"
860        modules="HTML::Parser">
861      <d:message xml:lang="en">Non‐white‐space characters are not allowed
862      after the <code>html</code> is closed.</d:message>
863    </d:item>
864    
865    <d:item name="image"
866        modules="HTML::Parser">
867      <d:message xml:lang="en">The <code>image</code> element is
868      obsolete.</d:message>
869    </d:item>
870    
871    <d:item name="in a:a"
872        modules="HTML::Parser">
873      <d:message xml:lang="en">Anchor cannot be nested.</d:message>
874      <d:desc xml:lang="en">
875        <p>HTML <code>a</code> elements cannot be nested.
876        The document is non-conforming.</p>
877    
878        <p>In the HTML syntax, a start tag of the <code>a</code>
879        implies the end tag of any opening <code>a</code> element.</p>
880      </d:desc>
881    </d:item>
882    
883    <d:item name="in body"
884        modules="HTML::Parser">
885      <d:message xml:lang="en">Start tag <code>&lt;<var>{text}</var>&gt;</code>
886      is not allowed in the <code>body</code> element.</d:message>
887      <d:desc xml:lang="en">
888        <p>The start or end tag of an element, which
889        cannot be a descendant of <code>body</code> element, appears
890        in the input stream while the <code>body</code> element has been opened.
891        The document is non-conforming.</p>
892      </d:desc>
893    </d:item>
894    
895    <d:item name="in body:#eof"
896        modules="HTML::Parser">
897      <d:message xml:lang="en">Some element is not closed before the end of
898      file.</d:message>
899    </d:item>
900    
901    <d:item name="in button:button"
902        modules="HTML::Parser">
903      <d:message xml:lang="en">The <code>button</code> element cannot be
904      nested.</d:message>
905    </d:item>
906    
907    <d:item name="in CDATA:#eof"
908        modules="HTML::Parser">
909      <d:message xml:lang="en">Element is not closed before the end of
910      file.</d:message>
911    </d:item>
912    
913    <d:item name="in form:form"
914        modules="HTML::Parser">
915      <d:message xml:lang="en">Start tag <code>&lt;form></code> is
916      not allowed in a <code>form</code> element.</d:message>
917    </d:item>
918    
919    <d:item name="in frameset"
920        modules="HTML::Parser">
921      <d:message xml:lang="en">Start tag <code>&lt;<var>{text}</var>></code> is
922      not allowed in a <code>framset</code> element.</d:message>
923    </d:item>
924    
925    <d:item name="in frameset:/"
926        modules="HTML::Parser">
927      <d:message xml:lang="en">End tag <code>&lt;/<var>{text}</var>></code> is
928      not allowed in a <code>frameset</code> element.</d:message>
929    </d:item>
930    
931    <d:item name="in frameset:#text"
932        modules="HTML::Parser">
933      <d:message xml:lang="en">Non‐white‐space characters are not allowed
934      in a <code>frameset</code> element.</d:message>
935    </d:item>
936    
937    <d:item name="in head:head"
938        modules="HTML::Parser">
939      <d:message xml:lang="en">Start tag <code>&lt;head&gt;</code>
940      is not allowed in the <code>head</code> element.</d:message>
941      <d:desc xml:lang="en">
942        <p>There is a start tag <code>&lt;head></code> in the
943        <code>&lt;head></code> element.  The document is non-conforming.</p>
944    
945        <p>In an HTML document there must not be more than
946        one <code>head</code> element, therefore no more than one
947        start tag <code>&lt;head></code> can appear in the input stream.</p>
948      </d:desc>
949    </d:item>
950    
951    <d:item name="in html:#DOCTYPE"
952        modules="HTML::Parser">
953      <d:message xml:lang="en">A <code>DOCTYPE</code> appears after any
954      element or data character has been seen.</d:message>
955      <!-- <!DOCTYPE HTML><!DOCTYPE HTML> -->
956      <!-- <html><!DOCTYPE HTML> -->
957      <d:desc xml:lang="en">
958        <p>A <code>DOCTYPE</code> appears after any element or data character
959        has been seen.  The document is non-conforming.</p>
960        
961        <p>The <code>DOCTYPE</code> must be placed before any
962        tag, reference, or data character.  Only white space characters
963        and comments can be inserted before the <code>DOCTYPE</code>.</p>
964      </d:desc>
965    </d:item>
966    
967    <d:item name="in nobr:nobr"
968        modules="HTML::Parser">
969      <d:message xml:lang="en">The <code>nobr</code> element cannot be
970      nested.</d:message>
971    </d:item>
972    
973    <d:item name="in noscript"
974        modules="HTML::Parser">
975      <d:message xml:lang="en">The <code><var>{text}</var></code> element is not
976      allowed in a <code>noscript</code> element in the
977      <code>head</code> element.</d:message>
978    </d:item>
979    
980    <d:item name="in noscript:/"
981        modules="HTML::Parser">
982      <d:message xml:lang="en">An end tag <code>&lt;/<var>{text}</var>></code>
983      appers before the <code>noscript</code> element is closed.</d:message>
984    </d:item>
985    
986    <d:item name="in noscript:#eof"
987        modules="HTML::Parser">
988      <d:message xml:lang="en">A <code>noscript</code> element is not closed
989      before the end of file.</d:message>
990    </d:item>
991    
992    <d:item name="in noscript:#text"
993        modules="HTML::Parser">
994      <d:message xml:lang="en">Non‐white‐space characters are not allowed
995      in a <code>noscript</code> element in the <code>head</code>
996      element.</d:message>
997    </d:item>
998    
999    <d:item name="in PCDATA:#eof"
1000        modules="HTML::Parser">
1001      <d:message xml:lang="en">Element is not closed before the end of
1002      file.</d:message>
1003    </d:item>
1004    
1005    <d:item name="in select"
1006        modules="HTML::Parser">
1007      <d:message xml:lang="en">Start tag <code>&lt;<var>{text}</var>&gt;</code>
1008      is not allowed in a <code>select</code> element.</d:message>
1009    </d:item>
1010    
1011    <d:item name="in select:/"
1012        modules="HTML::Parser">
1013      <d:message xml:lang="en">End tag <code>&lt;/<var>{text}</var>&gt;</code>
1014      is not allowed in a <code>select</code> element.</d:message>
1015    </d:item>
1016    
1017    <d:item name="in table"
1018        modules="HTML::Parser">
1019      <d:message xml:lang="en">Start tag <code>&lt;<var>{text}</var>&gt;</code>
1020      is not allowed in a <code>table</code> element.</d:message>
1021      <d:desc xml:lang="en">
1022        <p>The start or end tag of an element, which
1023        cannot be a child of <code>table</code> element, appears
1024        in the input stream while the <code>table</code> element has been opened
1025        but no other element has been opened.  The document is non-conforming.</p>
1026    
1027        <p>In <code>table</code>, only table related elements
1028        are allowed; any other element must be contained in
1029        <code>td</code> or <code>th</code> element to form
1030        a part of the table, or <code>caption</code> element to create
1031        a table caption.</p>
1032      </d:desc>
1033    </d:item>
1034    
1035    <d:item name="in table:/"
1036        modules="HTML::Parser">
1037      <d:message xml:lang="en">End tag <code>&lt;/<var>{text}</var>&gt;</code>
1038      is not allowed in a <code>table</code> element.</d:message>
1039    </d:item>
1040    
1041    <d:item name="in table:#text"
1042        modules="HTML::Parser">
1043      <d:message xml:lang="en">Non‐white‐space character is not allowed within
1044      the <code>table</code> element, outside of the caption and cells.</d:message>
1045      <d:desc xml:lang="en">
1046        <p>A non‐white‐space character appears in <code>table</code>.
1047        The document is non-conforming.</p>
1048    
1049        <p>In <code>table</code>, only table related elements
1050        are allowed; any other element and data character must be contained in
1051        <code>td</code> or <code>th</code> element to form
1052        a part of the table, or <code>caption</code> element to create
1053        a table caption.</p>
1054      </d:desc>
1055    </d:item>
1056    
1057    <d:item name="isindex"
1058        modules="HTML::Parser">
1059      <d:message xml:lang="en">The <code>isindex</code> element is
1060      obsolete.</d:message>
1061    </d:item>
1062    
1063    <d:item name="missing start tag:tr"
1064        modules="HTML::Parser">
1065      <d:message xml:lang="en">Start tag of <code>tr</code>
1066      element is missing.</d:message>
1067      <d:desc>
1068        <p>Start tag of a <code>tr</code> element, which is <em>not</em>
1069        optional, is missing.  The document is non-conforming.</p>
1070    
1071        <p>In a table section, a <code>&lt;tr></code> start tag
1072        must occur before any <code>&lt;td></code> or
1073        <code>&lt;th></code> start tag.  Though the HTML5 parser
1074        implies the <code>&lt;tr></code> start tag before
1075        these start tags, it must be explicitly specified.</p>
1076      </d:desc>
1077    </d:item>
1078    
1079    <d:item name="no DOCTYPE"
1080        class="parse-error"
1081        modules="HTML::Parser">
1082      <d:message xml:lang="en">This document does not start with a
1083      <code>DOCTYPE</code>.</d:message>
1084      <d:desc>
1085        <p>The document does not start with a <code>DOCTYPE</code>.
1086        The document is non-conforming.</p>
1087    
1088        <p>An HTML document must start by a <code>DOCTYPE</code>:
1089          <pre class="html example"><code>&lt;!DOCTYPE HTML></code></pre>
1090        </p>
1091    
1092        <p>Only white space characters and comments are allowed
1093        before the <code>DOCTYPE</code>.  XML declaration is <em>not</em>
1094        allowed in HTML document.</p>
1095      </d:desc>
1096    </d:item>
1097    
1098    <d:item name="not closed"
1099        class="parse-error"
1100        modules="HTML::Parser">
1101      <d:message xml:lang="en">Element <code><var>{text}</var></code> is not
1102      closed.</d:message>
1103      <d:desc>
1104        <p>End tag of an element is not found before, for example,
1105        an end tag of another element appears or
1106        the end of the document.  The document is non-conforming.</p>
1107    
1108        <p>Only <code>body</code>, <code>colgroup</code>, <code>dd</code>,
1109        <code>dt</code>, <code>head</code>, <code>html</code>, <code>li</code>,
1110        <code>ol</code>, <code>option</code>, <code>optgroup</code>,
1111        <code>p</code>, <code>rb</code>, <code>rp</code>, <code>rt</code>,
1112        <code>tbody</code>, <code>td</code>, <code>tfoot</code>,
1113        <code>th</code>, <code>thead</code>, <code>tr</code>,
1114        <code>ul</code> end tag can be omitted in HTML documents.
1115        For any element except for void element, there must be an explicit
1116        end tag.</p>
1117    
1118        <dl class="switch">
1119        <dt>HTML <code>canvas</code> element</dt>
1120          <dd>Though the element is void in earlier versions of Safari,
1121          the <code>canvas</code> element is <em>no</em> longer
1122          defined as empty.  There must be an end tag
1123          <code class="html example">&lt;/canvas></code>.</dd>
1124        </dl>
1125    
1126        <p>Note that misnesting tags, such as
1127        <code class="bad example">&lt;a>&lt;b>&lt;/a>&lt;/b></code>, are not
1128        allowed and they also cause this error.</p>
1129      </d:desc>
1130    </d:item>
1131    
1132    <d:item name="not first start tag"
1133        class="parse-error"
1134        modules="HTML::Parser">
1135      <d:message xml:lang="en">This <code>&lt;html></code> tag is not
1136      the first start tag.</d:message>
1137      <d:desc>
1138        <p>There is a start tag of the <code>html</code> element
1139        that it not the first start tag in the input stream.
1140        The document is non-conforming.</p>
1141    
1142        <p>In an HTML document, there cannot be more than one
1143        <code>html</code> element and therefore there cannot be
1144        more than one <code>&lt;html></code> tag.  In addition,
1145        nothing can be placed before the <code>&lt;html></code> tag
1146        except a <code>DOCTYPE</code>, white space characters,
1147        and comments.</p>
1148      </d:desc>
1149    </d:item>
1150    
1151    <d:item name="not HTML5"
1152        class="parse-error"
1153        modules="HTML::Parser">
1154      <d:message xml:lang="en">This document is written in an old version of
1155      HTML.</d:message>
1156      <d:desc xml:lang="en">
1157        <p>The document contains a <code>DOCTYPE</code> declaration
1158        that is different from HTML5 <code>DOCTYPE</code> (i.e.
1159        <code class="example html">&lt;!DOCTYPE HTML&gt;</code>).
1160        The document is non‐conforming.</p>
1161    
1162        <p>The document might or might not be conformant to
1163        some version of HTML.  However, conformance to any HTML
1164        specification other than HTML5 provides for no practical
1165        convenience, since Web borwsers will parse any
1166        HTML document (roughly) as defined in HTML5.</p>
1167      </d:desc>
1168    </d:item>
1169    
1170    <d:item name="start tag not allowed"
1171        class="parse-error"
1172        modules="HTML::Parser">
1173      <d:message xml:lang="en">Start tag <code>&lt;<var>{text}</var>></code> is
1174      not allowed here.</d:message>
1175    </d:item>
1176    
1177    <d:item name="unmatched end tag"
1178        class="parse-error"
1179        modules="HTML::Parser">
1180      <d:message xml:lang="en">Element <code><var>{text}</var></code> is not
1181      opened.</d:message>
1182      <d:desc>
1183        <p>An end tag appears though no element with the same name
1184        has been opened.  The document is non-conforming.</p>
1185    
1186        <p>For any end tag in HTML document, there must be a
1187        corresponding start tag.</p>
1188    
1189        <dl class="switch">
1190        <dt>HTML <code>base</code>, <code>basefont</code>,
1191        <code>bgsound</code>, <code>br</code>, <code>col</code>,
1192        <code>embed</code>, <code>frame</code>, <code>hr</code>,
1193        <code>image</code>, <code>img</code>, <code>input</code>,
1194        <code>isindex</code>, <code>link</code>, <code>meta</code>,
1195        <code>param</code>, <code>spacer</code>, or <code>wbr</code> element</dt>
1196          <dd>End tag is not allowed for these elements, since
1197          those content must always be empty.  Remove end tag.</dd>
1198        <!-- keygen -->
1199        <!-- command, event-source, nest, source -->
1200        </dl>
1201      </d:desc>
1202    </d:item>
1203    
1204  </section>  </section>
1205    
1206  <section id="element-content-model-errors">  <section id="element-content-model-errors">
1207  <h2>Element Content Model Errors</h2>  <h2>Element Content Model Errors</h2>
1208    
1209    <d:item name="basehref after URL attribute"
1210        modules="ContentChecker::HTML">
1211      <d:message xml:lang="en">The <code>base</code> element with the
1212      <code>href</code> attribute specified cannot be placed after
1213      any attribute with a URL.</d:message>
1214    </d:item>
1215    
1216    <d:item name="basetarget after hyperlink"
1217        modules="ContentChecker::HTML">
1218      <d:message xml:lang="en">The <code>base</code> element with the
1219      <code>target</code> attribute specified cannot be placed after
1220      any element that defines a hyperlink.</d:message>
1221    </d:item>
1222    
1223  <d:item name="character not allowed"  <d:item name="character not allowed"
1224      class="content-model-error">      modules="ContentChecker::HTML RDFXML">
1225    <d:message xml:lang="en">Data character is not allowed in this    <d:message xml:lang="en">Data character is not allowed in this
1226    context.</d:message>    context.</d:message>
1227    <d:desc xml:lang="en">    <d:desc xml:lang="en">
1228      <p>A data character occurs where it is not allowed in this      <p>A data character appears where it is not allowed in this
1229      context.  The document is non-conforming.</p>      context.  The document is non-conforming.</p>
1230    
1231      <p>Possible causes:      <p>Possible causes:
1232        <dl>        <ul>
1233        <dt>If the erred element is an inline-level element (such        <li><p>A data character cannot be a child
1234        as <code>a</code> or <code>span</code>)</dt>        of certain sectioning elements such as <code>body</code>,
1235            <dd><p>A data character cannot be a child        <code>section</code>, and <code>blockquote</code>.</p>
1236            of certain sectioning elements such as <code>body</code>,  
1237            <code>section</code>, and <code>blockquote</code>.</p>        <p>Any inline-level content must be put
1238          in e.g. paragraph element such as <code>p</code>.</p></li>
1239            <p>Any inline-level content must be put        <li><p>Though some elements such as <code>div</code>,
1240            in e.g. paragraph element such as <code>p</code>.</p></dd>        <code>li</code>, and <code>td</code> allow
1241        <dt>If the erred element is a block-level element (such as        <em>either one</em> of block-level or inline-level content
1242        <code>div</code> or <code>h<var>n</var></code>)</dt>        is allowed.  If there is a block-level content,
1243            <dd><p>Though some elements such as <code>div</code>,        any inline-level content must be put
1244            <code>li</code>, and <code>td</code> allow        in e.g. paragraph element such as <code>p</code>.</p></li>
1245            <em>either one</em> of block-level or inline-level content        </ul>
           is allowed.  If there is a block-level content,  
           any inline-level content must be put  
           in e.g. paragraph element such as <code>p</code>.</p></dd>  
       </dl>  
1246      </p>      </p>
1247    </d:desc>    </d:desc>
1248  </d:item>  </d:item>
1249    
1250    <d:item name="character not allowed:empty"
1251        modules="ContentChecker::HTML">
1252      <d:message xml:lang="en">Non‐white‐space characters are not allowed in
1253      an empty element.</d:message>
1254    </d:item>
1255    
1256    <d:item name="character not allowed:atom|PersonConstruct"
1257        modules="ContentChecker::HTML">
1258      <d:message xml:lang="en">Non‐white‐space characters are not allowed in
1259      Person construct.</d:message>
1260    </d:item>
1261    
1262    <d:item name="character not allowed:atom|TextConstruct"
1263        modules="ContentChecker::HTML">
1264      <d:message xml:lang="en">Non‐white‐space characters are not allowed in
1265      Text construct.</d:message>
1266    </d:item>
1267    
1268  <d:item name="child element missing"  <d:item name="child element missing"
1269      class="content-model-error">      modules="ContentChecker::HTML ContentChecker::Atom">
1270    <d:message xml:lang="en">There must be a <code><var>$0</var></code>    <d:message xml:lang="en">There must be an element
1271    element as a child of this element.</d:message>    <code><var>{text}</var></code> as a child of this element.</d:message>
1272    <d:desc xml:lang="en">    <d:desc xml:lang="en">
1273      <p>The content model of the element is so defined that it      <p>The content model of the element is so defined that it
1274      must contain a <code><var>$0</var></code> child element.      must contain a <code><var>$0</var></code> child element.
1275      Without such an element, the document is non-conforming.</p>      The document is non-conforming.</p>
1276    
1277      <p>For example:      <dl class="switch">
1278        <ul>      <dt>HTML <code>head</code> element</dt>
1279        <li>The <code>head</code> element must contain exactly one        <dd>There must be a <code>title</code> child element.</dd>
1280        <code>title</code> child element.</li>      <dt>HTML <code>html</code> element</dt>
1281        <li><a href="#child-element-missing:td%7Cth">The <code>tr</code>        <dd>There must be a <code>head</code> child element followed
1282        element must contain one or more <code>td</code> or <code>th</code>        by a <code>body</code> element.</dd>
1283        child element.</a></li>      <dt>HTML <code>tr</code> element</dt>
1284        </ul>        <dd><a href="#child-element-missing:td%7Cth">There must be
1285      </p>        one or more <code>td</code> or <code>th</code> child element.</a></dd>
1286        </dl>
1287    </d:desc>    </d:desc>
1288  </d:item>  </d:item>
1289    
# Line 117  Web Document Conformance Checker (BETA)< Line 1293  Web Document Conformance Checker (BETA)<
1293    or <code>th</code> element as a child of this element.</d:message>    or <code>th</code> element as a child of this element.</d:message>
1294    <d:desc xml:lang="en">    <d:desc xml:lang="en">
1295      <p>The <code>tr</code> element must contain at least one      <p>The <code>tr</code> element must contain at least one
1296      <code>td</code> or <code>th</code> child element.  Without      <code>td</code> or <code>th</code> child element.  The document
1297      such an element, the document is non-conforming.</p>      is non-conforming.</p>
1298    </d:desc>    </d:desc>
1299  </d:item>  </d:item>
1300    
1301    <d:item name="child element missing:atom"
1302        modules="ContentChecker::HTML">
1303      <d:message xml:lang="en">There must be an element
1304      <code><var>{text}</var></code> in the Atom namespace as a child of this
1305      element.</d:message>
1306    </d:item>
1307    
1308    <d:item name="child element missing:atom:link:alternate"
1309        modules="ContentChecker::HTML">
1310      <d:message xml:lang="en">There must be an Atom <code>link</code> element
1311      whose <code>rel</code> attribute is set to <code>alternate</code> as a
1312      child of this element.</d:message>
1313    </d:item>
1314    
1315    <d:item name="child element missing:atom:link:self"
1316        modules="ContentChecker::HTML">
1317      <d:message xml:lang="en">There should be an Atom <code>link</code> element
1318      whose <code>rel</code> attribute is set to <code>self</code> as a
1319      child of this element.</d:message>
1320    </d:item>
1321    
1322    <d:item name="element missing:hn"
1323        modules="ContentChecker::HTML">
1324      <d:message xml:lang="en">There must be at least one
1325      <code>h<var>n</var></code> element descendant.</d:message>
1326    </d:item>
1327    
1328  <d:item name="element not allowed"  <d:item name="element not allowed"
1329      class="content-model-error">      modules="ContentChecker::HTML ContentChecker::Atom RDFXML">
1330    <d:message xml:lang="en">This element is not allowed in this    <d:message xml:lang="en">This element is not allowed in this
1331    context.</d:message>    context.</d:message>
1332    <d:desc xml:lang="en">    <d:desc xml:lang="en">
1333      <p>An element occurs where it is not allowed.  The document      <p>An element appears where it is not allowed.  The document
1334      is non-conforming.</p>      is non-conforming.</p>
1335    
1336      <p>Possible causes:      <p>Possible causes:
1337        <dl>        <dl class="switch">
1338        <dt>If the erred element is an inline-level element (such        <dt>If the element with the error is an inline-level element,
1339        as <code>a</code> or <code>span</code>)</dt>        such as <code>a</code>, <code>progress</code>, or <code>img</code></dt>
1340            <dd><p>An inline-level element cannot be a child            <dd><p>An inline-level element cannot be a child
1341            of certain sectioning elements such as <code>body</code>,            of certain sectioning elements such as <code>body</code>,
1342            <code>section</code>, and <code>blockquote</code>.</p>            <code>section</code>, and <code>blockquote</code>.</p>
1343    
1344            <p>Any inline-level content must be put            <p>Any inline-level content must be put
1345            in e.g. paragraph element such as <code>p</code>.</p></dd>            in e.g. paragraph element such as <code>p</code>.</p></dd>
1346        <dt>If the erred element is a block-level element (such as        <dt>If it is a block-level elements, such as <code>aside</code>,
1347        <code>div</code> or <code>h<var>n</var></code>)</dt>        <code>div</code>, <code>h<var>n</var></code>,
1348            <dd><p>Though some elements such as <code>div</code>,        <code>p</code>, or <code>section</code></dt>
1349            <code>li</code>, and <code>td</code> allow            <dd><dl class="switch">
1350            <em>either one</em> of block-level or inline-level content                <dt>If the parent element is <code>div</code>,
1351            is allowed.  If there is a block-level content,                <code>li</code>, <code>td</code>, or <code>th</code></dt>
1352            any inline-level content must be put                <!-- @@ TODO: more... -->
1353            in e.g. paragraph element such as <code>p</code>.</p></dd>                    <!-- @@ TODO: <p><ul><li><p> -->
1354        <dt>If the erred element is the root <code>html</code> element</dt>                    <dd><p>The parent element allows <em>either</em>
1355            <dd><p>In an XHTML document, the root <code>html</code>                    block-level or inline-level content.  If there is a
1356            element must have an <code>xmlns</code> attribute                    block-level content, any inline-level content must be
1357            whose value is set to                    put in e.g. paragraph element such as <code>p</code>.</p>
1358            <code>http://www.w3.org/1999/xhtml</code>.</p></dd>                    <p>For example, an HTML document fragment
1359                      <code class="html bad example">&lt;div>&lt;p>Hello!&lt;/p> World!&lt;/div></code>
1360                      is non-conforming, since a word <q>World!</q> does not belong
1361                      to any paragraph.  (If not part of any paragraph, what is
1362                      it!?)  A conforming example would be:
1363                        <pre class="html example"><code>&lt;div>&lt;p>Hello!&lt;/p> &lt;p>World!&lt;/p>&lt;/div></code></pre>
1364                      </p></dd>
1365                  <dt>If the parent element does <em>not</em> allow
1366                  block-level elements as content</dt>
1367                      <dd>The element is not allowed to be inserted here.
1368                      For example, a <code>div</code> element cannot be
1369                      a child of an <code>h1</code> element.</dd>
1370              </dl></dd>
1371          <dt>If the element with the error is a <code>noscript</code> element</dt>
1372              <dd>The <code>noscript</code> element is allowed only in the context
1373              where a block-level or inline-level content is expected
1374              and in the <code>head</code> element.
1375              It cannot be used in e.g. <code>ul</code>, <code>table</code>,
1376              or <code>select</code>.</dd>
1377          <dt>If the element with the error is <code>blink</code>,
1378          <code>center</code>, or <code>marquee</code> element</dt>
1379              <dd>These elements are not part of the HTML standard.
1380              Use CSS for styling control.</dd>
1381    
1382          <dt><code>button</code>, <code>datalist</code>,
1383          <code>fieldset</code>, <code>form</code>,
1384          <code>input</code>, <code>label</code>,
1385          <code>optgroup</code>, <code>option</code>, <code>output</code>,
1386          <code>rb</code>, <code>rp</code>, <code>rt</code>, <code>ruby</code>,
1387          <code>textarea</code>, or <code>textarea</code> element</dt>
1388          <!-- rbc, rtc ? -->
1389              <dd>These elements are intentionally not supported by the conformance
1390              checker <em>yet</em>.</dd>
1391        </dl>        </dl>
1392      </p>      </p>
1393    </d:desc>    </d:desc>
1394  </d:item>  </d:item>
1395    
1396  enumerated:invalid;attribute-error;This attribute only allow a limited set of values and the specified value is not one of them.  <d:item name="element not allowed:area"
1397  no DOCTYPE;parse-error;This document does not start with the <code>DOCTYPE</code> declaration.      modules="ContentChecker ContentChecker::HTML">
1398  not HTML5;parse-error;This document is written in an old version of HTML.    <d:message xml:lang="en">An <code>area</code> element cannot be used
1399  not closed;parse-error;Element <code>$0</code> is not closed.    outside of a <code>map</code> element.</d:message>
1400  unmatched end tag;parse-error;Element <code>$0</code> is not opened.  </d:item>
1401    
1402  table:no cell in last row;table-model-error;The table has no cell (<code>td</code> or <code>th</code>) in the last row.  <d:item name="element not allowed:base"
1403        modules="ContentChecker ContentChecker::HTML">
1404  s:IMT:obsolete subtype;should;An <em>obsolete</em> subtype is used.    <d:message xml:lang="en">There is another <code>base</code>
1405  s:IMT:private subtype;should;A private (<code>x-</code> or <code>x.</code>) subtype is used.    element.</d:message>
1406  s:IMT:unregistered subtype;should;The subtype is not registered to IANA.  </d:item>
1407    
1408    <d:item name="element not allowed:datatemplate"
1409        modules="ContentChecker ContentChecker::HTML">
1410      <d:message xml:lang="en">In a <code>datatemplate</code> element, only
1411      <code>rule</code> elements are allowed.</d:message>
1412    </d:item>
1413    
1414    <d:item name="element not allowed:details legend"
1415        modules="ContentChecker::HTML">
1416      <d:message xml:lang="en">In a <code>details</code> element, only at the
1417      beginning of the element a <code>lengend</code> element
1418      may be used.</d:message>
1419    </d:item>
1420    
1421    <d:item name="element not allowed:empty"
1422        modules="ContentChecker::HTML ContentChecker::Atom">
1423      <d:message xml:lang="en">Elements are not allowed in an empty
1424      element.</d:message>
1425    </d:item>
1426    
1427    <d:item name="element not allowed:figure legend"
1428        modules="ContentChecker::HTML">
1429      <d:message xml:lang="en">In a <code>figure</code> element, only at the
1430      beginning or only at the end of the element a <code>lengend</code> element
1431      may be used.</d:message>
1432    </d:item>
1433    
1434    <d:item name="element not allowed:flow"
1435        modules="ContentChecker::HTML">
1436      <d:message xml:lang="en">This element is not allowed where flow
1437      content is expected.</d:message>
1438    </d:item>
1439    
1440    <d:item name="element not allowed:flow style"
1441        modules="ContentChecker::HTML">
1442      <d:message xml:lang="en">A <code>style</code> element without
1443      <code>scoped</code> attribute is not allowed in this context.</d:message>
1444    </d:item>
1445    
1446    <d:item name="element not allowed:head noscript"
1447        modules="ContentChecker::HTML">
1448      <d:message xml:lang="en">This element is not allowed in a
1449      <code>noscript</code> element in the <code>head</code> element.</d:message>
1450    </d:item>
1451    
1452    <d:item name="element not allowed:head style"
1453        modules="ContentChecker::HTML">
1454      <d:message xml:lang="en">A <code>style</code> element with
1455      <code>scoped</code> attribute is not allowed in the <code>head</code>
1456      element.</d:message>
1457    </d:item>
1458    
1459    <d:item name="element not allowed:head title"
1460        modules="ContentChecker ContentChecker::HTML">
1461      <d:message xml:lang="en">There is another <code>title</code>
1462      element.</d:message>
1463    </d:item>
1464    
1465    <d:item name="element not allowed:minus"
1466        modules="ContentChecker ContentChecker::HTML">
1467      <d:message xml:lang="en">This element is not allowed in this
1468      context.</d:message>
1469    </d:item>
1470    
1471    <d:item name="element not allowed:meta charset"
1472        modules="ContentChecker::HTML">
1473      <d:message xml:lang="en">The character encoding declaration is not the
1474      first child element in the <code>head</code> element.</d:message>
1475      <d:message xml:lang="ja">文字符号化宣言が <code>head</code>
1476      要素の最初の子要素ではありません。</d:message>
1477      <d:desc xml:lang="en">
1478        <p>The character encoding declaration
1479        (<code class="html example">&lt;meta charset="<var>...</var>"></code> or
1480        <code class="html example">&lt;meta http-equiv=Content-Type content="text/html; charset=<var>...</var>"></code>
1481        must be the first child element in the <code>head</code> element.</p>
1482    
1483        <p>The character encoding declaration have to occur near the beginning
1484        of the document to ensure that Web browsers can be determine the
1485        character encoding of the document.</p>
1486    
1487        <p>The <code>title</code> element and other metadata elements must
1488        appear after any character encoding declaration is processed.</p>
1489      </d:desc>
1490    </d:item>
1491    
1492    <d:item name="element not allowed:metadata"
1493        modules="ContentChecker::HTML">
1494      <d:message xml:lang="en">This element is not allowed where metadata
1495      content is expected.</d:message>
1496    </d:item>
1497    
1498    <d:item name="element not allowed:phrasing"
1499        modules="ContentChecker::HTML">
1500      <d:message xml:lang="en">This element is not allowed where phrasing
1501      content is expected.</d:message>
1502    </d:item>
1503    
1504    <d:item name="element not allowed:root"
1505        modules="ContentChecker">
1506      <d:message xml:lang="en">This element is not allowed as the root
1507      element of a document.</d:message>
1508      <d:desc xml:lang="en">
1509        <p>An element that is not allowed as the root element
1510        is used as the root element of the document.  The document is
1511        non-conforming, as far as the conformance checker can tell.</p>
1512    
1513        <dl class="switch">
1514        <dt><code>html</code> element in an XHTML document</dt>
1515            <dd><p>In <abbr>XHTML</abbr> document, the root <code>html</code>
1516            element must have an <code>xmlns</code> attribute as:
1517              <pre class="xml example"><code>&lt;html xmlns="http://www.w3.org/1999/xhtml"></code></pre></p></dd>
1518        <dt><code>rss</code> element</dt>
1519            <dd><p>The document is written in some version of RSS.</p>
1520            <p>The conformance checker does not support any version
1521            of RSS.  Use Atom 1.0 for feed documents.</p></dd>
1522        <dt><code>feed</code> element</dt>
1523            <dd><p>The Atom <code>feed</code> element must be
1524            in the <code>http://www.w3.org/2005/Atom</code>
1525            namespace as:
1526              <pre class="xml example"><code>&lt;feed xmlns="http://www.w3.org/2005/Atom"></code></pre>
1527            </p>
1528            <p>The conformance checker does not support Atom 0.3.
1529            Use Atom 1.0 for feed documents.</p></dd>
1530        </dl>
1531      </d:desc>
1532    </d:item>
1533    
1534    <d:item name="element not allowed:root:xml"
1535        modules="ContentChecker">
1536      <d:message xml:lang="en">This element is not allowed as the root element
1537      of an XML document.</d:message>
1538    </d:item>
1539    
1540    <d:item name="element not allowed:ruby base"
1541        modules="ContentChecker">
1542      <d:message xml:lang="en">This element is not allowed in the <code>ruby</code>
1543      element.</d:message>
1544    </d:item>
1545    
1546    <d:item name="element not allowed:text"
1547        modules="ContentChecker::HTML">
1548      <d:message xml:lang="en">This element is not allowed in this
1549      context.</d:message>
1550    </d:item>
1551    
1552    <d:item name="element not allowed:atom|content"
1553        modules="ContentChecker::Atom">
1554      <d:message xml:lang="en">This element is not allowed in an Atom
1555      <code>content</code> element.</d:message>
1556    </d:item>
1557    
1558    <d:item name="element not allowed:atom|PersonConstruct"
1559        modules="ContentChecker::Atom">
1560      <d:message xml:lang="en">This element is not allowed in Person
1561      construct.</d:message>
1562    </d:item>
1563    
1564    <d:item name="element not allowed:atom|TextConstruct"
1565        modules="ContentChecker::Atom">
1566      <d:message xml:lang="en">This element is not allowed in Text
1567      construct.</d:message>
1568    </d:item>
1569    
1570    <d:item name="element not defined"
1571        modules="ContentChecker">
1572      <d:message xml:lang="en">This element is not defined.</d:message>
1573      <d:message xml:lang="ja">この要素は定義されていません。</d:message>
1574      <d:desc xml:lang="en">
1575        <p>The element is not one of elements allowed
1576        in the latest version of relevant specifications.</p>
1577    
1578        <p>The element cannot be used.</p>
1579    
1580        <dl class="switch">
1581        <dt><code>event-source</code> element</dt>
1582            <dd>The element was renamed as <em><code>eventsource</code>
1583            element</em> (no hyphen).</dd>
1584        <dt><code>m</code> element</dt>
1585            <dd>The element was renamed as <em><code>mark</code>
1586            element</em>.</dd>
1587        </dl>
1588      </d:desc>
1589    </d:item>
1590    
1591    <d:item name="no significant content"
1592        modules="ContentChecker::HTML">
1593      <d:message xml:lang="en">No significant content is contained
1594      in this element.</d:message>
1595    </d:item>
1596    
1597    <d:item name="no significant content before"
1598        modules="ContentChecker::HTML">
1599      <d:message xml:lang="en">There is no significant content
1600      before this element.</d:message>
1601    </d:item>
1602    
1603    <d:item name="no significant content at the end"
1604        modules="ContentChecker::HTML">
1605      <d:message xml:lang="en">No significant content is contained
1606      at the end of this element.</d:message>
1607    </d:item>
1608    
1609    <d:item name="ps element missing"
1610        modules="ContentChecker::HTML">
1611      <d:message xml:lang="en">There is no <code><var>{text}</var></code>
1612      element before this element.</d:message>
1613      <d:desc xml:lang="en">
1614        <p>There must be an element before another element, but there
1615        is not.  The document is non-conforming.</p>
1616    
1617        <p>For example, there must be a <code>dt</code> element
1618        before any <code>dd</code> element.</p>
1619      </d:desc>
1620    </d:item>
1621    
1622    <d:item name="rp:syntax error"
1623        modules="ContentChecker::HTML">
1624      <d:message xml:lang="en">The content of a <code>rp</code> element must
1625      be a parenthesis.</d:message>
1626    </d:item>
1627    
1628    </section>
1629    
1630    <section id="attribute-errors">
1631    <h2>Attribute Errors</h2>
1632    
1633    <d:item name="attribute missing"
1634        modules="ContentChecker::HTML">
1635      <d:message xml:lang="en">Required attribute <code><var>{text}</var></code>
1636      is not specified.</d:message>
1637      <d:desc>
1638        <p>A required attribute is not specified.  The document
1639        is non-conforming.</p>
1640    
1641        <p>Some attribute is defined as <i>required</i>.
1642        Without required attributes specified, user agents
1643        cannot provide full functionality of the element to the user.</p>
1644    
1645        <dl class="switch">
1646        <dt>HTML <code>img</code> element</dt>
1647            <dd>The <code>src</code> attribute must be specified.
1648            Additionally, the <code>alt</code> attribute must be specified
1649            in many cases.</dd>
1650        <dt>HTML <code>link</code> element</dt>
1651            <dd>The <code>rel</code> attribute must be specified.
1652            Note that the <code>rev</code> attribute is obsolete.</dd>
1653        </dl>
1654      </d:desc>
1655    </d:item>
1656    
1657    <d:item name="attribute missing:data|type"
1658        modules="ContentChecker::HTML">
1659      <d:message xml:lang="en">For an <code>object</code> at least one of
1660      <code>data</code> and <code>type</code> attributes must be
1661      specified.</d:message>
1662    </d:item>
1663    
1664    <d:item name="attribute missing:href|target"
1665        modules="ContentChecker::HTML">
1666      <d:message xml:lang="en">For a <code>base</code> element, at least one of
1667      <code>href</code> and <code>target</code> attributes must be
1668      specified.</d:message>
1669    </d:item>
1670    
1671    <d:item name="attribute missing:name|http-equiv"
1672        modules="ContentChecker::HTML">
1673      <d:message xml:lang="en">For a <code>meta</code> element with the
1674      <code>content</code> attribute specified, exactly one of
1675      <code>name</code> and <code>http-equiv</code> attributes must be
1676      specified.</d:message>
1677    </d:item>
1678    
1679    <d:item name="attribute missing:name|http-equiv|charset"
1680        modules="ContentChecker::HTML">
1681      <d:message xml:lang="en">For a <code>meta</code> element, exactly one of
1682      <code>name</code>, <code>http-equiv</code>, and <code>charset</code>
1683      attributes must be specified.</d:message>
1684    </d:item>
1685    
1686    <d:item name="attribute not allowed"
1687        modules="ContentChecker::HTML RDFXML">
1688      <d:message xml:lang="en">Attribute
1689      <code><var>{local-name}</var></code> is not allowed for
1690      <code><var>{element-local-name}</var></code> element.</d:message>
1691      <d:desc xml:lang="en">
1692        <p>An attribute is specified where it is not allowed.
1693        The document is non-conforming.</p>
1694    
1695        <dl>
1696        <dt>HTML <code>meta</code> element</dt>
1697            <dd>For HTML <code>meta</code> element, <em>only one</em> of
1698            <code>name</code>, <code>http-equiv</code>, or <code>charset</code>
1699            attribute is allowed.</dd>
1700        </dl>
1701      </d:desc>
1702    </d:item>
1703    
1704    <d:item name="attribute not allowed:ismap"
1705        modules="ContentChecker::HTML">
1706      <d:message xml:lang="en">The <code>ismap</code> attribute may only be
1707      used for the image contained in an <code>a</code> element.</d:message>
1708    </d:item>
1709    
1710    <d:item name="attribute not defined"
1711        modules="ContentChecker">
1712      <d:message xml:lang="en">This attribute is not defined.</d:message>
1713      <d:message xml:lang="ja">この属性は定義されていません。</d:message>
1714      <d:desc xml:lang="en">
1715        <p>The attribute is not one of attributes allowed for the element
1716        in the latest version of relevant specifications.</p>
1717    
1718        <p>The attribute cannot be used.</p>
1719    
1720        <dl class="switch">
1721        <dt><code>align</code> attribute (various HTML elements)</dt>
1722        <dt><code>border</code> attribute (various HTML elements)</dt>
1723          <dd>These attributes are no longer part of HTML.  You can use CSS
1724          properties to control the presentation of the element.</dd>
1725        <dt><code>autosubmit</code> attribute (<code>menu</code> element)</dt>
1726          <dd>The attribute was part of HTML5 draft but then dropped.
1727          Similar functionality can be implemented by scripts.</dd>
1728        <dt><code>language</code> attribute (<code>script</code> element)</dt>
1729          <dd>The attribute is no longer the standard way to specify the
1730          scripting language.  If you are using JavaScript, then no explicit
1731          specification of the scripting language is necessary, so you can
1732          write the element like:
1733            <p><code class="html example code">&lt;script><br/><!--
1734            --> /* JavaScript code */<br/><!--
1735            -->&lt;/script></code></p>
1736          If you are using different scripting language from JavaScript, or
1737          you want to declare the scripting language explicitly, you should
1738          use the <code>type</code> attribute, as follows:
1739            <dl class="switch">
1740            <dt>JavaScript</dt>
1741              <dd>Use
1742              <code class="html example">&lt;script type="text/javascript"></code>.</dd>
1743            <dt>VBScript</dt>
1744              <dd>Use
1745              <code class="html example">&lt;script type="text/vbscript"></code>.</dd>
1746            </dl>
1747          </dd>
1748        </dl>
1749      </d:desc>
1750    </d:item>
1751    
1752    <d:item name="in HTML:xml:lang"
1753        modules="ContentChecker::XML">
1754      <d:message xml:lang="en">The <code>xml:lang</code> attribute in HTML
1755      document is ignored.</d:message>
1756      <d:desc xml:lang="en">
1757        <p>The <code>xml:lang</code> attribute does not have an effect in
1758        HTML document.</p>
1759    
1760        <p>The <code>xml:lang</code> attribute is only applicable to XML
1761        documents.  In HTML document, it is only allowed to ease migration
1762        from XML.</p>
1763    
1764        <p>To specify natural language information in HTML document,
1765        use <code>lang</code> attribute instead.</p>
1766    
1767        <p>XHTML 1.0 Appendix C was encouraged to specify both
1768        <code>lang</code> and <code>xml:lang</code> attributes with
1769        the same value.  Such a duplication has <em>no effect</em> in practice.
1770        Use only one of <code>lang</code> (in HTML) or <code>xml:lang</code> (in
1771        XML).</p>
1772    
1773        <!-- @@ ISSUE: xml:lang in non-HTML element in DOM5 HTML created
1774             from an HTML document? -->
1775      </d:desc>
1776    </d:item>
1777    
1778    <d:item name="in XML:charset"
1779        modules="ContentChecker::HTML">
1780      <d:message xml:lang="en">The <code>charset</code> attribute is not
1781      allowed in XML document.</d:message>
1782      <d:desc>
1783        <p>The <code>charset</code> attribute of a
1784        <code>meta</code> element is not allowed in XML document.
1785        The document is non-conforming.</p>
1786    
1787        <p>To specify the character encoding used for serialization,
1788        if necessary, use XML declaration instead:
1789          <pre class="xml example"><code>&lt;?xml version="1.0" encoding="<var>encoding-name</var>"?></code></pre>
1790        </p>
1791      </d:desc>
1792    </d:item>
1793    
1794    <d:item name="in XML:noscript"
1795        modules="ContentChecker::HTML">
1796      <d:message xml:lang="en">A <code>noscript</code> element cannot be
1797      used in XML document.</d:message>
1798    </d:item>
1799    
1800    <d:item name="in XML:xml:lang"
1801        modules="ContentChecker::HTML">
1802      <d:message xml:lang="en">The <code>xml:lang</code> attribute in no namespace
1803      is only allowed in HTML document.</d:message>
1804      <d:message xml:lang="ja">名前空間に属さない <code>xml:lang</code>
1805      属性が認められているのは HTML 文書中だけです。</d:message>
1806    </d:item>
1807    
1808    <d:item name="in XML:xmlns"
1809        modules="ContentChecker::HTML">
1810      <d:message xml:lang="en">The <code>xmlns</code> attribute
1811      in the <code>null</code> namespace is not allowed in
1812      XHTML document.  The document is non-conforming.</d:message>
1813      <d:desc>
1814        <p>The <code>xmlns</code> attribute in the <code>null</code>
1815        namespace is not allowed in XHTML document.</p>
1816    
1817        <p>This error should not occur in conformance-checking of
1818        static documents.</p>
1819      </d:desc>
1820    </d:item>
1821    
1822    <d:item name="xml:lang not allowed"
1823        modules="ContentChecker::HTML">
1824      <d:message xml:lang="en">The <code>xml:lang</code> attribute is only allowed
1825      when the <code>lang</code> attribute is specified.</d:message>
1826      <d:message xml:lang="ja"><code>xml:lang</code> 属性を指定できるのは
1827      <code>lang</code> 属性が指定されている時だけです。</d:message>
1828    </d:item>
1829    
1830    </section>
1831    
1832    <section id="attribute-value-errors">
1833    <h2>Attribute Value Errors</h2>
1834    
1835    <d:item name="boolean:invalid"
1836        modules="ContentChecker::HTML">
1837      <d:message xml:lang="en">Attribute value <code><var>{@}</var></code>
1838      is not allowed.  It must be an empty string or a string
1839      <code><var>{local-name}</var></code>.</d:message>
1840    </d:item>
1841    
1842    <d:item name="char:syntax error"
1843        modules="ContentChecker::HTML">
1844      <d:message xml:lang="en">The attribute value must be exactly one
1845      character.</d:message>
1846    </d:item>
1847    
1848    <d:item name="charref in charset"
1849        modules="ContentChecker::HTML">
1850      <d:message xml:lang="en">A character reference cannot be used to
1851      represent a character encoding name.</d:message>
1852    </d:item>
1853    
1854    <d:item name="charset:not preferred"
1855        modules="ContentChecker::HTML">
1856      <d:message xml:lang="en">Character encoding name
1857      <code><var>{value}</var></code> is not the preferred name of that
1858      character encoding.</d:message>
1859    </d:item>
1860    
1861    <d:item name="charset:not registered"
1862        modules="ContentChecker::HTML">
1863      <d:message xml:lang="en">Character encoding name
1864      <code><var>{value}</var></code> is not a registered name.</d:message>
1865      <d:desc xml:lang="en">
1866        <p>The specified character encoding name is not registered to
1867        <abbr>IANA</abbr>.  Use of registered character encoding name
1868        is a good practice to facilitate interoperability.</p>
1869    
1870        <dl class="switch">
1871        <dt><code>EUC-TW</code></dt>
1872          <dd><code>EUC-TW</code> is not registered.  Unfortunately, there
1873          is no registered name for that character encoding.  Use
1874          Big5 encoding with character encoding name <code>Big5</code>
1875          if it is enough to represent the document.</dd>
1876        <dt><code>ISO-2022-JP-1</code></dt>
1877          <dd><code>ISO-2022-JP-1</code> is not registered, nevertheless
1878          this character encoding name is documented in
1879          <a href="urn:ietf:rfc:2237"><abbr>RFC</abbr> 2237</a>.  Use
1880          <code>ISO-2022-JP-2</code> instead, since that character encoding
1881          is a superset of ISO-2022-JP-1.</dd>
1882        <dt><code>ISO-2022-JP-3</code>, <code>ISO-2022-JP-3-plane1</code></dt>
1883          <dd>These names are not registered and obsoleted in favor of
1884          <code>ISO-2022-JP-2004</code> and
1885          <code>ISO-2022-JP-2004-plane1</code>.</dd>
1886        <dt><code>ISO-2022-JP-2003</code>,
1887        <code>ISO-2022-JP-2003-plane1</code></dt>
1888          <dd>These names are not registered and corrected to
1889          <code>ISO-2022-JP-2004</code> and
1890          <code>ISO-2022-JP-2004-plane1</code>.</dd>
1891        <dt><code>ISO-2022-JP-2004</code>,
1892        <code>ISO-2022-JP-2004-plane1</code></dt>
1893          <dd>These names are not registered.  Unfortunately, there is
1894          no registered name for these character encodings.</dd>
1895        <dt><code>UTF-8N</code></dt>
1896          <dd><code>UTF-8N</code> is not registered.  Character encoding
1897          name <code>UTF-8</code> represents UTF-8 encoding with or
1898          without <abbr>BOM</abbr>.</dd>
1899        </dl>
1900    
1901        <p><strong>WARNING</strong>: This error might be raised for
1902        a registered character encoding name, since the character encoding
1903        name database of the conformance checker is not complete yet.</p>
1904      </d:desc>
1905    </d:item>
1906    
1907    <d:item name="charset:private"
1908        modules="ContentChecker::HTML">
1909      <d:message xml:lang="en">Character encoding name
1910      <code><var>{value}</var></code> is a private name.</d:message>
1911      <d:desc xml:lang="en">
1912        <p>The specified character encoding name is a private name and
1913        not registered to <abbr>IANA</abbr>.  Use of registered character
1914        encoding name is a good practice to facilitate interoperability.</p>
1915    
1916        <dl class="switch">
1917        <dt><code>x-euc-jp</code></dt>
1918          <dd>Use <code>EUC-JP</code> for the Japanese <abbr>EUC</abbr>
1919          character encoding.</dd>
1920        <dt><code>x-sjis</code></dt>
1921          <dd>Use <code>Shift_JIS</code> for standard Shift encoding scheme of
1922          <abbr>JIS</abbr> coded character set, or <code>Windows-31J</code>
1923          for Microsoft standard character set as implemented by
1924          Microsoft Windows.</dd>
1925        </dl>
1926      </d:desc>
1927    </d:item>
1928    
1929    <d:item name="charset:syntax error"
1930        modules="ContentChecker::HTML">
1931      <d:message xml:lang="en">The specified value <code><var>{value}</var></code>
1932      is syntactically not a character encoding name.</d:message>
1933      <d:desc xml:lang="en">
1934        <p>The attribute value must be a character encoding name.  However,
1935        the specified value is not a character encoding name syntactically.
1936        The document is non‐conforming.</p>
1937        <p>Character encoding name is a string of <abbr>ASCII</abbr>
1938        printable characters, up to 40 characters.</p>
1939      </d:desc>
1940    </d:item>
1941    
1942    <d:item name="color:syntax error"
1943        modules="ContentChecker::HTML">
1944      <d:message xml:lang="en">The specified value is not a color
1945      name or hexadecimal color number.</d:message>
1946    </d:item>
1947    
1948    <d:item name="coords:number not 3"
1949        modules="ContentChecker::HTML">
1950      <d:message xml:lang="en">The <code>coords</code> attribute have to
1951      contain three (3) numbers (specified:
1952      <code><var>{text}</var></code>).</d:message>
1953    </d:item>
1954    
1955    <d:item name="coords:number not 4"
1956        modules="ContentChecker::HTML">
1957      <d:message xml:lang="en">The <code>coords</code> attribute have to
1958      contain four (4) numbers (specified:
1959      <code><var>{text}</var></code>).</d:message>
1960    </d:item>
1961    
1962    <d:item name="coords:number lt 6"
1963        modules="ContentChecker::HTML">
1964      <d:message xml:lang="en">The <code>coords</code> attribute have to
1965      contain more than or equal to six (6) numbers (specified:
1966      <code><var>{text}</var></code>).</d:message>
1967    </d:item>
1968    
1969    <d:item name="coords:number not even"
1970        modules="ContentChecker::HTML">
1971      <d:message xml:lang="en">The <code>coords</code> attribute have to
1972      contain even number of numbers (specified:
1973      <code><var>{text}</var></code>).</d:message>
1974    </d:item>
1975    
1976    <d:item name="coords:out of range"
1977        modules="ContentChecker::HTML">
1978      <d:message xml:lang="en">The specified value <code><var>{value}</var></code>
1979      is out of range.</d:message>
1980    </d:item>
1981    
1982    <d:item name="coords:syntax error"
1983        modules="ContentChecker::HTML">
1984      <d:message xml:lang="en">The specified value is not valid.</d:message>
1985    </d:item>
1986    
1987    <d:item name="datetime:bad year"
1988        modules="ContentChecker::HTML">
1989      <d:message xml:lang="en">Year number is out of range.</d:message>
1990    </d:item>
1991    
1992    <d:item name="datetime:bad month"
1993        modules="ContentChecker::HTML">
1994      <d:message xml:lang="en">Month number is out of range.</d:message>
1995    </d:item>
1996    
1997    <d:item name="datetime:bad day"
1998        modules="ContentChecker::HTML">
1999      <d:message xml:lang="en">Day number is out of range.</d:message>
2000    </d:item>
2001    
2002    <d:item name="datetime:bad hour"
2003        modules="ContentChecker::HTML">
2004      <d:message xml:lang="en">Hour number is out of range.</d:message>
2005    </d:item>
2006    
2007    <d:item name="datetime:bad minute"
2008        modules="ContentChecker::HTML">
2009      <d:message xml:lang="en">Minute number is out of range.</d:message>
2010    </d:item>
2011    
2012    <d:item name="datetime:bad second"
2013        modules="ContentChecker::HTML">
2014      <d:message xml:lang="en">Second number is out of range.</d:message>
2015    </d:item>
2016    
2017    <d:item name="datetime:bad timezone hour"
2018        modules="ContentChecker::HTML">
2019      <d:message xml:lang="en">Hour number of the timezone component is out of
2020      range.</d:message>
2021    </d:item>
2022    
2023    <d:item name="datetime:bad timezone minute"
2024        modules="ContentChecker::HTML">
2025      <d:message xml:lang="en">Minute number of the timezone component is out of
2026      range.</d:message>
2027    </d:item>
2028    
2029    <d:item name="datetime:syntax error"
2030        modules="ContentChecker::HTML">
2031      <d:message xml:lang="en">The attribute value is not a datetime.</d:message>
2032    </d:item>
2033    
2034    <d:item name="dateortime:syntax error"
2035        modules="ContentChecker::HTML">
2036      <d:message xml:lang="en">The value is not a date or time.</d:message>
2037    </d:item>
2038    
2039    <d:item name="enumerated:invalid"
2040        modules="ContentChecker::HTML">
2041      <d:message xml:lang="en">This attribute only allow a limited set of
2042      values and the specified value <code><var>{@}</var></code> is not one
2043      of them.</d:message>
2044      <d:desc xml:lang="en">
2045        <p>For this attribute only several values are allowed and the
2046        value of the attribute is not one of them.  The document
2047        is non-conforming.</p>
2048    
2049        <dl>
2050        <dt>HTML <code>meta</code> element, <code>http-equiv</code> attribute</dt>
2051            <dd><p>Only values <code>Default-Style</code> and <code>Refresh</code>
2052            are allowed.</p>
2053            <p>Value <code>Content-Type</code> is obsolete; for charset
2054            declaration, the <code>charset</code> attribute can be used as:
2055            <pre class="html example"><code>&lt;meta charset="<var>charset-name</var>"></code></pre>
2056            ... where <var>charset-name</var> is a name of the character encoding
2057            of the document, such as <code>utf-8</code>.</p>
2058            <p>Values <code>Content-Style-Type</code> and
2059            <code>Content-Script-Type</code> are currently not allowed.</p>
2060            <p>Value <code>Keywords</code> is not allowed.  Use
2061            <code>name</code> attribute instead of <code>http-equiv</code>
2062            attribute.</p>
2063            <p>Values <code>Expires</code>, <code>Pragma</code>,
2064            and <code>Cache-Control</code> are not allowed;
2065            use <em>real</em> HTTP header fields for cache control.</p></dd>
2066        </dl>
2067      </d:desc>
2068    </d:item>
2069    
2070    <d:item name="enumerated:invalid:http-equiv:content-type"
2071        class="attribute-value-error">
2072      <d:message xml:lang="en">Character encoding declaration syntax
2073      <code class="html bad example">&lt;meta http-equiv="Content-Type" content="text/html; charset=<var>charset-name</var>"></code>
2074      is obsolete.</d:message>
2075      <d:desc xml:lang="en">
2076        <p>Old long character encoding declaration syntax
2077        <code class="html bad example">&lt;meta http-equiv="Content-Type" content="text/html; charset=<var>charset-name</var>"></code>
2078        is in use.  The document is non‐conforming.</p>
2079    
2080        <p>The new character encoding declaration syntax is:
2081          <pre class="html example"><code>&lt;meta charset="<var>charset-name</var>"></code></pre>
2082        </p>
2083      </d:desc>
2084    </d:item>
2085    
2086    <d:item name="enumerated:non-conforming"
2087        modules="ContentChecker::HTML">
2088      <d:message xml:lang="en">Attribute value <code><var>{@}</var></code>
2089      is not allowed.</d:message>
2090    </d:item>
2091    
2092    <d:item name="duplicate http-equiv"
2093        modules="ContentChecker::HTML">
2094      <d:message xml:lang="en">There is another pragma
2095      <code><var>{value}</var></code>.</d:message>
2096    </d:item>
2097    
2098    <d:item name="duplicate ID"
2099        class="attribute-value-error"
2100        modules="ContentChecker::XML ContentChecker::HTML">
2101      <d:message xml:lang="en">This identifier has already been
2102      assigned to another element.</d:message>
2103      <!-- @@ <id=a xml:id=a>? -->
2104    </d:item>
2105    
2106    <d:item name="duplicate token"
2107        modules="ContentChecker::HTML HTML::Table">
2108      <d:message xml:lang="en">The token <code><var>{value}</var></code>
2109      appears in the attribute value twice.</d:message>
2110    </d:item>
2111    
2112    <d:item name="empty attribute value"
2113        modules="ContentChecker::HTML">
2114      <d:message xml:lang="en">The attribute value is empty.</d:message>
2115      <d:message xml:lang="ja">属性値が空です。</d:message>
2116    </d:item>
2117    
2118    <d:item name="empty style sheet title"
2119        modules="ContentChecker::HTML">
2120      <d:message xml:lang="en">The value of the <code>title</code> attribute
2121      is empty.</d:message>
2122      <d:message xml:lang="ja"><code>title</code> 属性の値が空です。</d:message>
2123      <d:desc xml:lang="en">
2124        <p>The <code>title</code> attribute value of the <code>link</code>
2125        element that defines an alternate style sheet is an empty value.</p>
2126    
2127        <p>A <code>link</code> element whose <code>rel</code> attribute
2128        is <code>alternate stylesheet</code> defines an alternate style sheet.
2129        An alternate style sheet must be associated with a name using the
2130        <code>title</code> attribute.  The name cannot be empty.</p>
2131      </d:desc>
2132    </d:item>
2133    
2134    <d:item name="float:out of range"
2135        modules="ContentChecker::HTML">
2136      <d:message xml:lang="en">The specified value is out of range.</d:message>
2137    </d:item>
2138    
2139    <d:item name="float:syntax error"
2140        modules="ContentChecker::HTML">
2141      <d:message xml:lang="en">The attribute value is not a real
2142      number.</d:message>
2143    </d:item>
2144    
2145    <d:item name="fragment points itself"
2146        modules="ContentChecker">
2147      <d:message xml:lang="en">A fragment identifier references the element
2148      itself.</d:message>
2149    </d:item>
2150    
2151    <d:item name="fragment points nothing"
2152        modules="ContentChecker">
2153      <d:message xml:lang="en">A fragment identifier references no
2154      node.</d:message>
2155    </d:item>
2156    
2157    <d:item name="hashref:syntax error"
2158        modules="ContentChecker::HTML">
2159      <d:message xml:lang="en">A hash−name reference must start with a
2160      <code>#</code> character.</d:message>
2161    </d:item>
2162    
2163    <d:item name="id ne name"
2164        modules="ContentChecker::HTML">
2165      <d:message xml:lang="en">The <code>id</code> attribute value is
2166      different from the <code>name</code> attribute value.</d:message>
2167    </d:item>
2168    
2169    <d:item name="integer:syntax error"
2170        modules="ContentChecker::HTML">
2171      <d:message xml:lang="en">The attribute value is not an integer.</d:message>
2172    </d:item>
2173    
2174    <d:item name="link type:bad context"
2175        modules="ContentChecker::HTML">
2176      <d:message xml:lang="en">The link type <code><var>{value}</var></code>
2177      cannot be specified for this element.</d:message>
2178      <d:desc xml:lang="en">
2179        <p>The specified link type cannot be used for the element.
2180        The document is non-conforming.</p>
2181    
2182        <p>Link types are associated with limited set of elements.
2183        They cannot be used with other elements.</p>
2184    
2185        <p>For example, link type <code>bookmark</code>
2186        can be used with <code>a</code> or <code>area</code> element,
2187        while it cannot be used with <code>link</code> element.</p>
2188      </d:desc>
2189    </d:item>
2190    
2191    <d:item name="invalid attribute value"
2192        class="attribute-value-error"
2193        modules="ContentChecker::XML ContentChecker::HTML ContentChecker::Atom">
2194      <d:message xml:lang="en">Attribute value <code><var>{@}</var></code>
2195      is not an allowed value.</d:message>
2196    </d:item>
2197    
2198    <d:item name="length:syntax error"
2199        modules="ContentChecker::HTML">
2200      <d:message xml:lang="en">The attribute value is not a length
2201      value.</d:message>
2202    </d:item>
2203    
2204    <d:item name="link type:non-conforming"
2205        modules="ContentChecker::HTML">
2206      <d:message xml:lang="en">The link type <code><var>{value}</var></code>
2207      is non-conforming.</d:message>
2208      <d:desc xml:lang="en">
2209        <p>The specified link type is non-conforming, and therefore
2210        the document is non-conforming.</p>
2211    
2212        <dl class="switch">
2213        <dt>Link type <code>contents</code></dt>
2214          <dd>Use link type <code>index</code>.</dd>
2215        <dt>Link type <code>copyright</code></dt>
2216          <dd>Use link type <code>license</code>.</dd>
2217        <dt>Link type <code>home</code></dt>
2218          <dd>Use link type <code>index</code>.</dd>
2219        <dt>Link type <code>previous</code></dt>
2220          <dd>Use link type <code>prev</code>.</dd>
2221        <dt>Link type <code>start</code></dt>
2222          <dd>Use link type <code>first</code>.</dd>
2223        <dt>Link type <code>toc</code> or <code>top</code></dt>
2224          <dd>Use link type <code>index</code>.</dd>
2225        </dl>
2226      </d:desc>
2227    </d:item>
2228    
2229    <d:item name="meta content-type syntax error"
2230        modules="ContentChecker::HTML">
2231      <d:message xml:lang="en">The specified value is not a valid as a long
2232      character encoding declaration.</d:message>
2233    </d:item>
2234    
2235    <d:item name="mismatched charset name"
2236        modules="ContentChecker::HTML">
2237      <d:message xml:lang="en">The specified character encoding name
2238      <code><var>{value}</var></code> is different from the actual document
2239      character encoding <code><var>{text}</var></code>.</d:message>
2240      <d:desc xml:lang="en">
2241        <p>The specified character encoding name is different from
2242        the character encoding of the document.  The document
2243        is non‐conforming.</p>
2244      </d:desc>
2245    </d:item>
2246    
2247    <d:item name="mismatched charset name not checked"
2248        mopdules="ContentChecker::HTML">
2249      <d:message xml:lang="en">Whether the specified character encoding name
2250      <code><var>{value}</var></code> matches to the actual character encoding
2251      name cannot be checked since the input is not a byte stream.</d:message>
2252    </d:item>
2253    
2254    <d:item name="mode:syntax error"
2255        modules="ContentChecker::HTML">
2256      <d:message xml:lang="en">The attribute value is not a valid mode
2257      name.</d:message>
2258    </d:item>
2259    
2260    <d:item name="nninteger:out of range"
2261        modules="ContentChecker::HTML">
2262      <d:message xml:lang="en">The specified value is out of range.</d:message>
2263    </d:item>
2264    
2265    <d:item name="nninteger:syntax error"
2266        modules="ContentChecker::HTML">
2267      <d:message xml:lang="en">The attribute value is not a non‐negative
2268      integer.</d:message>
2269    </d:item>
2270    
2271    <d:item name="no referenced map"
2272        modules="ContentChecker">
2273      <d:message xml:lang="en">The <code>usemap</code> attribute references
2274      no image map.</d:message>
2275    </d:item>
2276    
2277    <d:item name="no referenced menu"
2278        modules="ContentChecker">
2279      <d:message xml:lang="en">The <code>contextmenu</code> attribute references
2280      no menu.</d:message>
2281    </d:item>
2282    
2283    <d:item name="no referenced header cell"
2284        modules="ContentChecker">
2285      <d:message xml:lang="en">There is no table header cell whose <code>id</code>
2286      is <code><var>{value}</var></code> in the same table.</d:message>
2287    </d:item>
2288    
2289    <d:item name="refresh:syntax error"
2290        modules="ContentChecker::HTML">
2291      <d:message xml:lang="en">the specified value is not a valid as part
2292      of a <code>Refresh</code> pragma.</d:message>
2293    </d:item>
2294    
2295    <d:item name="repeat:syntax error"
2296        modules="ContentChecker::HTML">
2297      <d:message xml:lang="en">The attribute value is not an integer or
2298      a string <code>template</code>.</d:message>
2299    </d:item>
2300    
2301    <d:item name="reserved browsing context name"
2302        class="attribute-value-error">
2303      <d:message xml:lang="en">Browsing context name
2304      <code><var>{@}</var></code> is reserved.</d:message>
2305      <d:desc xml:lang="en">
2306        <p>The specified browsing context name is reserved.
2307        The document is non-conforming.</p>
2308    
2309        <p>Names of browsing contexts starting with <code>_</code>
2310        (<code>U+005F</code> <code class="charname">LOW LINE</code>)
2311        are reserved so that it must not be used.</p>
2312    
2313        <p>Old version of HTML, non-HTML markup languages, and
2314        Web browsers define or implements special reserved
2315        browsing context names <code>_blank</code>,
2316        <code>_main</code>, and <code>_replace</code>.
2317        However, they are <em>not</em> conforming attribute values.</p>
2318      </d:desc>
2319    </d:item>
2320    
2321    <d:item name="Reserved Prefixes and Namespace Names:Name"
2322        modules="ContentChecker::XML">
2323      <d:message xml:lang="en">Namespace name <code><var>{text}</var></code>
2324      is reserved and cannot be used for an arbitrary prefix.</d:message>
2325    </d:item>
2326    
2327    <d:item name="Reserved Prefixes and Namespace Names:Prefix"
2328        modules="ContentChecker::XML">
2329      <d:message xml:lang="en">Namespace prefix <code><var>{text}</var></code>
2330      is reserved and cannot be used for an arbitrary namespace name.</d:message>
2331    </d:item>
2332    
2333    <d:item name="link type:proposed"
2334        modules="ContentChecker::HTML">
2335      <d:message xml:lang="en">Link type <code><var>{value}</var></code>
2336      is proposed but not accepted yet; it <em>should not</em> be
2337      used until it has been accepted.</d:message>
2338      <d:desc>
2339        <p>The link type is in the <i>proposed</i> status; it
2340        <em>should not</em> be used until it has been
2341        accepted.</p>
2342    
2343        <p><strong>Warning</strong>: The data served to the
2344        conforming checker might be out of date; it might have already
2345        been accepted or rejected.  The document might or might not be
2346        conforming depending on the status.  See WHATWG Wiki
2347        for the latest information.</p>
2348      </d:desc>
2349    </d:item>
2350    
2351    <d:item name="sizes:syntax error"
2352        modules="ContentChecker::HTML">
2353      <d:message xml:lang="en">The specified value <code><var>{value}</var></code>
2354      is not a valid value.</d:message>
2355    </d:item>
2356    
2357    <d:item name="space in ID"
2358        modules="ContentChecker::HTML">
2359      <d:message xml:lang="en">White space characters are not allowed
2360      in the <code>id</code> attribute.</d:message>
2361    </d:item>
2362    
2363    <d:item name="template:not template"
2364        modules="ContentChecker ContentChecker::HTML">
2365      <d:message xml:lang="en">The node referenced by the <code>template</code>
2366      attribute is not a template.</d:message>
2367    </d:item>
2368    
2369    <d:item name="window name:empty"
2370        modules="ContentChecker::HTML">
2371      <d:message xml:lang="en">Browsing context name must not be empty.</d:message>
2372    </d:item>
2373    
2374    <d:item name="window name:reserved"
2375        modules="ContentChecker::HTML">
2376      <d:message xml:lang="en">Browsing context name
2377      <code><var>{value}</var></code> is reserved.</d:message>
2378    </d:item>
2379    
2380    <d:item name="word not allowed"
2381        modules="ContentChecker::HTML">
2382      <d:message xml:lang="en">The word <code><var>{value}</var></code> is not
2383      allowed in this attribute.</d:message>
2384    </d:item>
2385    
2386    <d:item name="XML 1.0 NCName:syntax error"
2387        modules="RDFXML">
2388      <d:message xml:lang="en">The specified value is not a legal XML Namespaces
2389      1.0 <code>NCName</code>.</d:message>
2390    </d:item>
2391    
2392    <d:item name="xml:lang ne lang"
2393        modules="ContentChecker::XML ContentChecker::HTML">
2394      <d:message xml:lang="en">The value of the <code>xml:lang</code> attribute
2395      is different from the value of the <code>lang</code> attribute.</d:message>
2396      <d:message xml:lang="ja"><code>xml:lang</code> 属性の値が <code>lang</code>
2397      属性の値と異なります。</d:message>
2398      <d:desc xml:lang="en">
2399        <p>The value of the <code>xml:lang</code> attribute (either the
2400        <code>lang</code> attribute in the <code>xml</code> (i.e.
2401        <code>http://www.w3.org/XML/1998/namespace</code>) namespace, or
2402        the <code>xml:lang</code> attribute in no namespace) for the element has
2403        different value than that of the <code>lang</code> attribute in no
2404        namespace.</p>
2405    
2406        <p>For historical reason, there are two attributes applicable to HTML
2407        elements to specify language information of an element: <code>lang</code>
2408        and <code>xml:lang</code>.  In HTML documents, only <code>lang</code>
2409        attribute in no namespace is allowed and take effect; the
2410        <code>xml:lang</code> attribute in no namespace is ignored in HTML
2411        documents.  In XHTML documents, both <code>lang</code> and
2412        <code>xml:lang</code> attributes are allowed.</p>
2413    
2414        <p>In general, <em>only the <code>lang</code> attribute</em> need to be
2415        specified for an element.</p>
2416    
2417        <p>If both <code>lang</code> and <code>xml:lang</code> attributes are
2418        specified on the same element, their values must be the same value.</p>
2419      </d:desc>
2420      <d:desc xml:lang="ja">
2421        <p><code>xml:lang</code> 属性 (<code>xml</code> (=
2422        <code>http://www.w3.org/XML/1998/namespace</code>) 名前空間の
2423        <code>lang</code> 属性や名前空間に属さない
2424        <code>xml:lang</code> 属性) の値が同じ要素の名前空間に属さない
2425        <code>lang</code> 属性の値と異なっています。</p>
2426    
2427        <p>歴史的な理由により、 HTML 要素の言語指定のための属性は
2428        <code>lang</code> と <code>xml:lang</code> の2つがあります。 HTML
2429        文書では名前空間に属さない <code>lang</code> 属性だけが認められており、
2430        かつ効力があります。名前空間に属さない
2431        <code>xml:lang</code> 属性は HTML 文書では無視されます。 XHTML 文書では
2432        <code>lang</code> 属性も <code>xml:lang</code> 属性も認められています。</p>
2433    
2434        <p>通常、要素の言語情報は <em><code>lang</code>
2435        属性だけ</em>を使って指定すれば十分です。</p>
2436    
2437        <p><code>lang</code> 属性と <code>xml:lang</code>
2438        属性の両方を同じ要素に指定する場合、
2439        両者の値は同じでなければなりません。</p>
2440      </d:desc>
2441    </d:item>
2442    
2443    </section>
2444    
2445    <section id="table-model-errors">
2446    <h2>Table Model Errors</h2>
2447    
2448    <d:item name="cell overlapping"
2449        modules="HTML::Table">
2450      <d:message xml:lang="en">Cell slot (<var>{text}</var>) is filled by
2451      multiple cells.</d:message>
2452    </d:item>
2453    
2454    <d:item name="colspan creates column with no anchored cell"
2455        modules="HTML::Table">
2456      <d:message xml:lang="en">This <code>colspan</code> attribute
2457      results in creating a table column that does not contain
2458      any cell anchored to it.</d:message>
2459    </d:item>
2460    
2461    <d:item name="column with no anchored cell"
2462        modules="HTML::Table">
2463      <d:message xml:lang="en">This column has no anchored cell.</d:message>
2464    </d:item>
2465    
2466    <d:item name="table:no cell in last row"
2467        class="table-model-error">
2468      <d:message xml:lang="en">The table has no cell (<code>td</code> or
2469      <code>th</code>) in the last row.</d:message>
2470    </d:item>
2471    
2472    <d:item name="table:rowspan extends table"
2473        class="table-model-error">
2474      <d:message xml:lang="en">This <code>rowspan</code> attribute
2475      results in creating a table row that does not contain
2476      any cell anchored to it.</d:message>
2477      <d:desc xml:lang="en">
2478        <p>The <code>rowspan</code> attribute value of the cell
2479        is so specified that it extends a table in the row axis.
2480        However, the extended row does not contain any cell by itself.
2481        The document is non-conforming.</p>
2482    
2483        <p>For example, the table below is non-conforming:
2484          <pre class="html bad example"><code>&lt;table>
2485    &lt;tbody>
2486    &lt;tr>&lt;td rowspan=2>&lt;/td>&lt;/tr>
2487    &lt;/tbody>
2488    &lt;/table></code></pre>
2489        ... since the second row contains only
2490        a cell that spans between first and second rows.</p>
2491      </d:desc>
2492    </d:item>
2493    
2494    <d:item name="row with no anchored cell"
2495        modules="HTML::Table">
2496      <d:message xml:lang="en">This row has no anchored cell.</d:message>
2497    </d:item>
2498    
2499    <d:item name="rowspan creates row with no anchored cell"
2500        modules="HTML::Table">
2501      <d:message xml:lang="en">This <code>rowspan</code> attribute
2502      results in creating a table row that does not contain
2503      any cell anchored to it.</d:message>
2504    </d:item>
2505    
2506    
2507    </section>
2508    
2509    <section id="imt-warnings">
2510    <h2>Internet Media Type Errors</h2>
2511    
2512    <d:item name="boundary:syntax error"
2513        modules="IMTChecker">
2514      <d:message xml:lang="en">The specified value is not a valid value
2515      as a multipart boundary.</d:message>
2516    </d:item>
2517    
2518    <d:item name="e4x:syntax error"
2519        modules="IMTChecker">
2520      <d:message xml:lang="en">The specified value is not a valid value
2521      for the attribute <code>e4x</code>.</d:message>
2522    </d:item>
2523    
2524    <d:item name="IMT:attribute syntax error"
2525        modules="IMTChecker">
2526      <d:message xml:lang="en">The specified value,
2527      <code><var>{value}</var></code>, is syntactically not a valid
2528      attribute name.</d:message>
2529    </d:item>
2530    
2531    <d:item name="IMT:composite"
2532        modules="ContentChecker::Atom">
2533      <d:message xml:lang="en">The specified media type is a composite
2534      type, which is not allowed in this context.</d:message>
2535    </d:item>
2536    
2537    <d:item name="IMT:limited use subtype"
2538        modules="IMTChecker">
2539      <d:message xml:lang="en">An Internet Media Type whose intended usage
2540      is limited use, <code><var>{value}</var></code> is used.</d:message>
2541    </d:item>
2542    
2543    <d:item name="IMT:syntax error"
2544        modules="ContentChecker::HTML ContentChecker::Atom">
2545      <d:message xml:lang="en">The specified value is not an Internet Media
2546      Type.</d:message>
2547    </d:item>
2548    
2549    <d:item name="IMT:obsolete parameter"
2550        modules="IMTChecker">
2551      <d:message xml:lang="en">An obsolete parameter
2552      <code><var>{value}</var></code> is used.</d:message>
2553    </d:item>
2554    
2555    <d:item name="IMT:obsolete subtype"
2556        modules="IMTChecker">
2557      <d:message xml:lang="en">An obsolete Internet Media Type
2558      <code><var>{value}</var></code> is used.</d:message>
2559      <d:message xml:lang="ja">廃止されたインターネット媒体型
2560      <code><var>{value}</var></code> が使われています。</d:message>
2561      <d:desc xml:lang="en">
2562        <p>The specified Internet Media Type is registered with its intended
2563        usage as <i>OBSOLETE</i>.</p>
2564        
2565        <dl class="swtich">
2566        <dt>Media type <code>text/ecmascript</code></dt>
2567          <dd>Media type <code>text/ecmascript</code> is obsoleted in
2568          favor of <code>application/ecmascript</code>.  Note that
2569          <em><code>text/javascript</code></em> would be the better alternative
2570          in many cases.</dd>
2571        <dt>Media type <code>text/javascript</code></dt>
2572          <dd>Media type <code>text/javascript</code> is obsoleted by
2573          <abbr>IETF</abbr> with backward incompatible alternate
2574          <code>application/javascript</code> for architectural
2575          purity.<!-- @@ ref? -->  Those who prefer reality to academic
2576          purity <em>may ignore</em> this warning.</dd>
2577        </dl>
2578      </d:desc>
2579    </d:item>
2580    
2581    <d:item name="IMT:parameter missing"
2582        modules="IMTChecker">
2583      <d:message xml:lang="en">Parameter <code><var>{text}</var></code> have to
2584      be specified for the Internet Media Type
2585      <code><var>{value}</var></code>.</d:message>
2586    </d:item>
2587    
2588    <d:item name="IMT:parameter not allowed"
2589        modules="IMTChecker">
2590      <d:message xml:lang="en">Parameter <code><var>{value}</var></code> is not
2591      allowed for this Internet Media Type.</d:message>
2592    </d:item>
2593    
2594    <d:item name="IMT:private subtype"
2595        modules="IMTChecker">
2596      <d:message xml:lang="en">Use of a private Internet Media Type
2597      <code><var>{value}</var></code> is not encouraged.</d:message>
2598    </d:item>
2599    
2600    <d:item name="IMT:private type"
2601        modules="IMTChecker">
2602      <d:message xml:lang="en">Use of a private type
2603      <code><var>{value}</var></code> is not encouraged.</d:message>
2604    </d:item>
2605    
2606    <d:item name="IMT:subtype syntax error"
2607        modules="IMTChecker">
2608      <d:message xml:lang="en">Value <code><var>{value}</var></code> is
2609      syntactically not a valid subtype value of an Internet Media Type.</d:message>
2610    </d:item>
2611    
2612    <d:item name="IMT:type syntax error"
2613        modules="IMTChecker">
2614      <d:message xml:lang="en">Value <code><var>{value}</var></code> is
2615      syntactically not a valid type.</d:message>
2616    </d:item>
2617    
2618    <d:item name="IMT:unknown parameter"
2619        modules="IMTChecker">
2620      <d:message xml:lang="en">An unknown parameter <code><var>{value}</var></code>
2621      is used.  The conformance checker cannot determine whether use of this
2622      parameter is valid or not.</d:message>
2623    </d:item>
2624    
2625    <d:item name="IMT:unknown subtype"
2626        modules="IMTChecker">
2627      <d:message xml:lang="en">An unknown Internet Media Type
2628      <code><var>{value}</var></code> is used.  At the time of the update of
2629      the conformance checker's Internet Media Type database, the subtype is
2630      not reigstered to the IANA registry.  The subtype, however, might be
2631      registerd to the IANA registry thereafter.  Please consult the IANA
2632      registry.</d:message>
2633    </d:item>
2634    
2635    <d:item name="IMT:unregistered subtype"
2636        modules="IMTChecker">
2637      <d:message xml:lang="en">Use of an Internet Media Type
2638      <code><var>{value}</var></code> is not encouraged since it is not
2639      part of the IANA registry.</d:message>
2640    </d:item>
2641    
2642    <d:item name="IMT:unregistered type"
2643        modules="IMTChecker">
2644      <d:message xml:lang="en">Use of a type
2645      <code><var>{value}</var></code> is not encouraged since it is not
2646      a standardized type.</d:message>
2647    </d:item>
2648    
2649    <d:item name="not IMT"
2650        modules="ContentChecker::Atom">
2651      <d:message xml:lang="en">A value that is not an Internet Media Type
2652      is not allowed here.</d:message>
2653    </d:item>
2654    
2655    </section>
2656    
2657    <section id="uri-errors">
2658    <h2>URL Errors</h2>
2659    
2660    <d:item name="syntax error:iri3987"
2661        modules="URIChecker CacheManifest">
2662      <d:message xml:lang="en">The specified value is syntactically not an
2663      IRI.</d:message>
2664    </d:item>
2665    
2666    <d:item name="syntax error:iriref3987"
2667        modules="URIChecker">
2668      <d:message xml:lang="en">The specified value is syntactically not an IRI
2669      reference.</d:message>
2670      <d:desc xml:lang="en">
2671        <p>The specified value does not satisfy the syntactical requirements
2672        for IRI references.  The document is non-conforming.</p>
2673    
2674        <p>Possible causes:
2675          <ul>
2676          <li>The string might contain one or more white space characters.
2677          Especially, the <code> </code> (<code>U+0020</code>
2678          <code class="charname">SPACE</code>) character cannot be
2679          used in IRI references.</li>
2680          </ul>
2681        </p>
2682      </d:desc>
2683    </d:item>
2684    
2685    <d:item name="syntax error:rdfuriref"
2686        modules="URIChecker">
2687      <d:message xml:lang="en">The specified value is syntactically not an RDF
2688      URI reference.</d:message>
2689    </d:item>
2690    
2691    <d:item name="syntax error:uri2396"
2692        modules="URIChecker">
2693      <d:message xml:lang="en">The specified value is syntactically not a
2694      URI according to RFC 2396.</d:message>
2695    </d:item>
2696    
2697    <d:item name="syntax error:uri3986"
2698        modules="URIChecker">
2699      <d:message xml:lang="en">The specified value is syntactically not a
2700      URI.</d:message>
2701    </d:item>
2702    
2703    <d:item name="URL:address format"
2704        modules="URIChecker">
2705      <d:message xml:lang="en">URL host address format
2706      <code><var>{text}</var></code> is not defined.</d:message>
2707    </d:item>
2708    
2709    <d:item name="URL:default port"
2710        modules="URIChecker">
2711      <d:message xml:lang="en">Default port number should be omitted.</d:message>
2712    </d:item>
2713    
2714    <d:item name="URL:dot-segment"
2715        modules="URIChecker">
2716      <d:message xml:lang="en">A dot-segment (<code>.</code> or
2717      <code>..</code>) occurs in an absolute reference.</d:message>
2718      <d:desc>
2719        <p>Dot-segment (<code>.</code> or <code>..</code>) should
2720        not occur in an absolute reference.</p>
2721    
2722        <p>In relative references, dot-segments are used to represent
2723        the current (<code>.</code>) or the parent (<code>..</code>)
2724        hierarchy of the path.  Though they are also allowed
2725        in absolute references, it should be resolved to the
2726        canonical form before it has been published.</p>
2727      </d:desc>
2728    </d:item>
2729    
2730    <d:item name="URL:empty host"
2731        modules="URIChecker">
2732      <d:message xml:lang="en">The host component of the URL is empty.</d:message>
2733    </d:item>
2734    
2735    <d:item name="URL:empty path"
2736        modules="URIChecker">
2737      <d:message xml:lang="en">The URL does not end with
2738      a <code>/</code> character.</d:message>
2739      <d:item xml:lang="en">
2740        <p>The IRI does not end with a <code>/</code>.  If there is an
2741        authority component in an IRI, a <code>/</code> should be present
2742        instead of empty path component.</p>
2743    
2744        <p>For example, <code>http://www.example.com<strong>/</strong></code>
2745        is preferred to <code>http://www.example.com</code>.</p>
2746      </d:item>
2747    </d:item>
2748    
2749    <d:item name="URL:empty port"
2750        modules="URIChecker">
2751      <d:message xml:lang="en">The port component of the URL is empty.</d:message>
2752    </d:item>
2753    
2754    <d:item name="URL fragment not allowed"
2755        modules="CacheManifest">
2756      <d:message xml:lang="en">The fragment component of the URL is not
2757      allowed.</d:message>
2758    </d:item>
2759    
2760    <d:item name="URL:long host"
2761        modules="URIChecker">
2762      <d:message xml:lang="en">The host component of the URL
2763      is too long.</d:message>
2764    </d:item>
2765    
2766    <d:item name="URL:lowercase hexadecimal digit"
2767        modules="URIChecker">
2768      <d:message xml:lang="en">A lowercase hexadecimal digit is used
2769      in percent-encoding.</d:message>
2770      <d:desc xml:lang="en">
2771        <p>The hexadecimal digit in percent-encoding string in the IRI
2772        is in lowercase.  Though the IRI <em>is</em> conforming,
2773        it should be in uppercase.</p>
2774      </d:desc>
2775    </d:item>
2776    
2777    <d:item name="URL:non-DNS host"
2778        modules="URIChecker">
2779      <d:message xml:lang="en">The host component of the URL
2780      is not a DNS host name.</d:message>
2781    </d:item>
2782    
2783    <d:item name="URL:non UTF-8 host"
2784        modules="URIChecker">
2785      <d:message xml:lang="en">The host component of the URL
2786      is not encoded in UTF-8.</d:message>
2787    </d:item>
2788    
2789    <d:item name="URL:password"
2790        modules="URIChecker">
2791      <d:message xml:lang="en">Password should not be included in a URL
2792      for the security.</d:message>
2793    </d:item>
2794    
2795    <d:item name="URL:percent-encoded unreserved"
2796        modules="URIChecker">
2797      <d:message xml:lang="en">An unreserved character is
2798      percent-encoded.</d:message>
2799      <d:desc xml:lang="en">
2800        <p>An unreserved character is percent-encoded in the IRI.
2801        Though it <em>is</em> conforming, it should be in the
2802        decoded (or bare) form.</p>
2803      </d:desc>
2804    </d:item>
2805    
2806    <d:item name="URL:uppercase host"
2807        modules="URIChecker">
2808      <d:message xml:lang="en">The host <code><var>{value}</var></code>
2809      should be spelt in lowercase.</d:message>
2810    </d:item>
2811    
2812    <d:item name="URL:uppercase scheme name"
2813        modules="URIChecker">
2814      <d:message xml:lang="en">URL scheme name is in uppercase.</d:message>
2815      <d:desc xml:lang="en">
2816        <p>The scheme part of the IRI is written in uppercase letter.</p>
2817    
2818        <p>Uppercase scheme names are not required to be processed
2819        correctly.</p>
2820    <!-- @@
2821     RFC 3986 3.1.
2822     > Although schemes are case-
2823       insensitive, the canonical form is lowercase and documents that
2824       specify schemes must do so with lowercase letters.
2825    
2826     > An implementation ... should only produce lowercase scheme names for
2827       consistency.
2828    -->
2829      </d:desc>
2830    </d:item>
2831    
2832    </section>
2833    
2834    <section id="mq-errors">
2835    <h2>Media Query Errors</h2>
2836    
2837    <d:item name="mq syntax error"
2838        modules="CSS::MediaQueryParser">
2839      <d:message xml:lang="en">The specified value has a syntax error as a
2840      media query.</d:message>
2841    </d:item>
2842    
2843    <d:item name="unknown media type"
2844        modules="CSS::MediaQueryParser">
2845      <d:message xml:lang="en">Media type <code><var>{value}</var></code> is
2846      not supported by the conformance checker.</d:message>
2847    </d:item>
2848    
2849    </section>
2850    
2851    <section id="selectors-errors">
2852    <h2>Selectors Errors</h2>
2853    
2854    <d:item name="an+b not closed"
2855        modules="CSS::SelectorsParser">
2856      <d:message xml:lang="en">Argument list of the pseudo-class is
2857      not closed by a <code>)</code> character.</d:message>
2858    </d:item>
2859    
2860    <d:item name="ab+b not integer"
2861        modules="CSS::SelectorsParser">
2862      <d:message xml:lang="en">Numbers in the argument
2863      <code><var>a</var>n+<var>b</var></code> have to be integers.</d:message>
2864    </d:item>
2865    
2866    <d:item name="an+b syntax error"
2867        modules="CSS::SelectorsParser">
2868      <d:message xml:lang="en">Argument <code><var>a</var>n+<var>b</var></code> is
2869      syntactically incorrect.</d:message>
2870    </d:item>
2871    
2872    <d:item name="attr selector not closed"
2873        modules="CSS::SelectorsParser">
2874      <d:message xml:lang="en">Attribute selector is not closed by
2875      a <code>]</code> character.</d:message>
2876    </d:item>
2877    
2878    <d:item name="lang selector not closed"
2879        modules="CSS::SelectorsParser">
2880      <d:message xml:lang="en">Argument list of the <code>:lang</code>
2881      selector is not closed by a <code>)</code> character.</d:message>
2882    </d:item>
2883    
2884    <d:item name="namespace prefix:not declared"
2885        modules="CSS::SelectorsParser">
2886      <d:message xml:lang="en">Namespace prefix <code><var>{value}</var></code>
2887      is not declared.</d:message>
2888    </d:item>
2889    
2890    <d:item name="no attr local name"
2891        modules="CSS::SelectorsParser">
2892      <d:message xml:lang="en">Attribute local name is missing.</d:message>
2893    </d:item>
2894    
2895    <d:item name="no attr match"
2896        modules="CSS::SelectorsParser">
2897      <d:message xml:lang="en">Attribute matching operator (e.g.
2898      <code>=</code>) is missing.</d:message>
2899    </d:item>
2900    
2901    <d:item name="no attr name"
2902        modules="CSS::SelectorsParser">
2903      <d:message xml:lang="en">Attribute name is missing.</d:message>
2904    </d:item>
2905    
2906    <d:item name="no attr namespace separator"
2907        modules="CSS::SelectorsParser">
2908      <d:message xml:lang="en">Attribute namespace wildcard <code>*</code>
2909      is not followed by a <code>|</code> character.</d:message>
2910    </d:item>
2911    
2912    <d:item name="no attr value"
2913        modules="CSS::SelectorsParser">
2914      <d:message xml:lang="en">Attribute value is missing.</d:message>
2915    </d:item>
2916    
2917    <d:item name="no class name selector"
2918        modules="CSS::SelectorsParser">
2919      <d:message xml:lang="en">Class name is missing.</d:message>
2920      <!-- "." not followed by a class name -->
2921    </d:item>
2922    
2923    <d:item name="no combinator"
2924        modules="CSS::SelectorsParser">
2925      <d:message xml:lang="en">Combinator is missing.</d:message>
2926    </d:item>
2927    
2928    <d:item name="no contains string"
2929        modules="CSS::SelectorsParser">
2930      <d:message xml:lang="en">No string is specified in the argument
2931      list of the <code>:-manakai-contains</code> pseudo-class
2932      selector.</d:message>
2933    </d:item>
2934    
2935    <d:item name="no lang tag"
2936        modules="CSS::SelectorsParser">
2937      <d:message xml:lang="en">Language tag argument is missing.</d:message>
2938    </d:item>
2939    
2940    <d:item name="no local name selector"
2941        modules="CSS::SelectorsParser">
2942      <d:message xml:lang="en">Local name part of the type selector (or
2943      <code>*</code> for the universal selector) is missing.</d:message>
2944      <!-- "|" not followed by a name or "*" -->
2945    </d:item>
2946    
2947    <d:item name="no pseudo-class name"
2948        modules="CSS::SelectorsParser">
2949      <d:message xml:lang="en">Pseudo-class name is missing.</d:message>
2950    </d:item>
2951    
2952    <d:item name="no pseudo-element name"
2953        modules="CSS::SelectorsParser">
2954      <d:message xml:lang="en">Pseudo-element name is missing.</d:message>
2955    </d:item>
2956    
2957    <d:item name="no sss"
2958        modules="CSS::SelectorsParser">
2959      <d:message xml:lang="en">Sequence of simple selectors is
2960      expected.</d:message>
2961    </d:item>
2962    
2963    <d:item name="not not closed"
2964        modules="CSS::SelectorsParser">
2965      <d:message xml:lang="en">Argument list of the <code>:not</code> selector
2966      is not closed by a <code>)</code> character.</d:message>
2967    </d:item>
2968    
2969    <d:item name="ss after pseudo-element"
2970        modules="CSS::SelectorsParser">
2971      <d:message xml:lang="en">Simple selector is not allowed after a
2972      pseudo element.</d:message>
2973    </d:item>
2974    
2975    <d:item name="unknown pseudo-class"
2976        modules="CSS::SelectorsParser">
2977      <d:message xml:lang="en">Pseudo-class <code>:<var>{value}</var></code>
2978      is not supported by the conformance checker.</d:message>
2979    </d:item>
2980    
2981    <d:item name="unknown pseudo-element"
2982        modules="CSS::SelectorsParser">
2983      <d:message xml:lang="en">Pseudo-element <code>::<var>{value}</var></code>
2984      is not supported by the conformance checker.</d:message>
2985    </d:item>
2986    
2987    </section>
2988    
2989    <section id="css-errors">
2990    <h2>CSS Errors</h2>
2991    
2992    <d:item name="at-rule not allowed"
2993        modules="CSS::Parser">
2994      <d:message xml:lang="en">An <code>@<var>{text}</var></code> rule is not
2995      allowed here.</d:message>
2996    </d:item>
2997    
2998    <d:item name="at-rule syntax error"
2999        modules="CSS::Parser">
3000      <d:message xml:lang="en">The <code>@<var>{text}</var></code> rule is
3001      syntactically incorrect.</d:message>
3002    </d:item>
3003    
3004    <d:item name="block not closed"
3005        modules="CSS::Parser">
3006      <d:message xml:lang="en">Block is not closed before the end of
3007      file.</d:message>
3008    </d:item>
3009    
3010    <d:item name="CSS duplication"
3011        modules="CSS::Parser">
3012      <d:message xml:lang="en">Component <code>&lt;<var>{text}</var>></code> is
3013      already specified.</d:message>
3014    </d:item>
3015    
3016    <d:item name="CSS cursor hand"
3017        modules="CSS::Parser">
3018      <d:message xml:lang="en">Value <code>hand</code> is not valid as
3019      <code>&lt;'cursor'></code>.</d:message>
3020    </d:item>
3021    
3022    <d:item name="CSS syntax error"
3023        modules="CSS::Parser">
3024      <d:message xml:lang="en">Specified value is syntactically not a correct
3025      <code>&lt;<var>{text}</var>></code>.</d:message>
3026    </d:item>
3027    
3028    <d:item name="no declaration block"
3029        modules="CSS::Parser">
3030      <d:message xml:lang="en">No declaration block is found after a group of
3031      selectors.</d:message>
3032    </d:item>
3033    
3034    <d:item name="no property colon"
3035        modules="CSS::Parser">
3036      <d:message xml:lang="en">A <code>:</code> character is missing after
3037      a property name.</d:message>
3038    </d:item>
3039    
3040    <d:item name="no property name"
3041       modules="CSS::Parser">
3042      <d:message xml:lang="en">Property name is expected.</d:message>
3043    </d:item>
3044    
3045    <d:item name="no property semicolon"
3046       modules="CSS::Parser">
3047      <d:message xml:lang="en">A <code>;</code> character is missing at the
3048      end of the property.</d:message>
3049    </d:item>
3050    
3051    <d:item name="priority syntax error"
3052        modules="CSS::Parser">
3053      <d:message xml:lang="en">Priority part of the declaration is syntactically
3054      incorrect.</d:message>
3055    </d:item>
3056    
3057    <d:item name="unknown at-rule"
3058        modules="CSS::Parser">
3059      <d:message xml:lang="en">The <code>@<var>{value}</var></code> rule is
3060      not supported by the conformance checker.</d:message>
3061    </d:item>
3062    
3063    <d:item name="unknown property"
3064        modules="CSS::Parser">
3065      <d:message xml:lang="en">Property <code><var>{value}</var></code> is
3066      not supported by the conformance checker.</d:message>
3067    </d:item>
3068    
3069    </section>
3070    
3071    <section id="cache-manifest-errors">
3072    <h2>Cache Manifest Errors</h2>
3073    
3074    <d:item name="both in entries and whitelist"
3075        modules="CacheManifest">
3076      <d:message xml:lang="en">This URL is found both in the explicit or
3077      fallback entries and in the online whitelist.</d:message>
3078    </d:item>
3079    
3080    <d:item name="different origin from manifest"
3081        modules="CacheManifest">
3082      <d:message xml:lang="en">The specified URL has different origin from
3083      the manifest.</d:message>
3084    </d:item>
3085    
3086    <d:item name="different scheme from manifest"
3087        modules="CacheManifest">
3088      <d:message xml:lang="en">The scheme component of the URL is
3089      different from that of the manifest URL.  The URL is ignored.</d:message>
3090    </d:item>
3091    
3092    <d:item name="duplicate oc namespace"
3093        modules="CacheManifest">
3094      <d:message xml:lang="en">This oppotunistic caching namespace is already
3095      specified.</d:message>
3096    </d:item>
3097    
3098    <d:item name="no fallback entry URL"
3099        modules="CacheManifest">
3100      <d:message xml:lang="en">Fallback entry URL is missing.</d:message>
3101    </d:item>
3102    
3103    <d:item name="not manifest"
3104        modules="CacheManifest">
3105      <d:message xml:lang="en">This document is not a cache manifest.</d:message>
3106      <d:desc xml:lang="en">
3107        <p>The specified document is <em>not</em> a cache manifest.
3108        The document is non-conforming.</p>
3109    
3110        <p>An entity labeled as Internet media type
3111        <code>text/cache-manifest</code> must contain a cache manifest.</p>
3112    
3113        <p>A cache manifest must start with a line whose content is
3114        <code class="manifest example">CACHE MANIFEST</code>
3115        (exactly one space character between
3116        <code>CACHE</code> and <code>MANIFEST</code>).</p>
3117      </d:desc>
3118    </d:item>
3119    
3120    <d:item name="same as manifest URL"
3121        modules="CacheManifest">
3122      <d:message xml:lang="en">This URL is same as the manifest URL.</d:message>
3123    </d:item>
3124    
3125    </section>
3126    
3127    <section id="information">
3128    <h2>Stability Information</h2>
3129    
3130    <d:item name="deprecated:attr"
3131        modules="ContentChecker">
3132      <d:message xml:lang="en">This attribute is deprecated.</d:message>
3133    </d:item>
3134    
3135    <d:item name="deprecated:element"
3136        modules="ContentChecker">
3137      <d:message xml:lang="en">This element is deprecated.</d:message>
3138    </d:item>
3139    
3140    <d:item name="status:cr:element"
3141        modules="ContentChecker">
3142      <d:message xml:lang="en">This element is in the
3143      <strong>call for implementation</strong> stage.</d:message>
3144      <d:desc xml:lang="en">
3145        <p>The element is in the call for implementation stage.</p>
3146        
3147        <p>Usually, using the element is safe.  However, it is a new feature
3148        so that it might not be implemented correctly.  If it is found that
3149        the feature is hard or impossible to implement, the feature
3150        might be revised, or in some case it might be dropped.</p>
3151    
3152        <p>Elements defined by Atom 1.0 (IETF Proposed Standard), and XBL 2.0
3153        (W3C Candidate Recommendation) belong to this class.</p>
3154      </d:desc>
3155    </d:item>
3156    
3157    <d:item name="status:lc:element"
3158        modules="ContentChecker">
3159      <d:message xml:lang="en">This element is in the <strong>last
3160      call for comments</strong> stage.</d:message>
3161      <d:desc xml:lang="en">
3162        <p>The element is in the last call for comments stage.</p>
3163        
3164        <p>The element is relatively mature, though the standardization
3165        is not done yet.  It may be used for experiments.  Since it is a new
3166        feature, it might not be implemented correctly or at all.  If it is
3167        found that the feature is hard or impossible to implement, the feature
3168        might be revised or might be dropped.</p>
3169    
3170        <p>Elements defined by Web Forms 2.0 as well as some elements
3171        defined by HTML5 belong to this class.</p>
3172      </d:desc>
3173    </d:item>
3174    
3175    <d:item name="status:wd:element"
3176        modules="ContentChecker">
3177      <d:message xml:lang="en">This element is documented in a <strong>working
3178      draft</strong>.</d:message>
3179      <d:desc xml:lang="en">
3180        <p>The element is documented in a working or editor's draft
3181        and not yet completed.</p>
3182        
3183        <p>The element should not be used for any practical purpose.
3184        The feature might be drastically changed later or might be
3185        entirely removed.</p>
3186    
3187        <p>Most of new elements defined by HTML5 belong to this class.</p>
3188      </d:desc>
3189    </d:item>
3190    
3191    <d:item name="status:non-standard:element"
3192        modules="ContentChecker">
3193      <d:message xml:lang="en">This element is <strong>not part of any
3194      standard</strong> the conformance checker knows.</d:message>
3195      <d:desc xml:lang="en">
3196        <p>The element is not part of any standard or draft the conformance
3197        checker is aware of.</p>
3198        
3199        <p>The element should not be used for any practical purpose unless
3200        there is really a standard that defines the element.</p>
3201      </d:desc>
3202    </d:item>
3203    
3204    <d:item name="status:cr:attr"
3205        modules="ContentChecker">
3206      <d:message xml:lang="en">This attribute is in the
3207      <strong>call for implementation</strong> stage.</d:message>
3208      <d:desc xml:lang="en">
3209        <p>The attribute is in the call for implementation stage.</p>
3210        
3211        <p>Usually, using the attribute is safe.  However, it is a new feature
3212        so that it might not be implemented correctly.  If it is found that
3213        the feature is hard or impossible to implement, the feature
3214        might be revised, or in some case it might be dropped.</p>
3215      </d:desc>
3216    </d:item>
3217    
3218  s:URI::empty path;should;This IRI should explicitly end with <code>/</code>.  <d:item name="status:lc:attr"
3219  m:URI::syntax error;must;This IRI is not syntactically valid.      modules="ContentChecker">
3220      <d:message xml:lang="en">This attribute is in the <strong>last
3221      call for comments</strong> stage.</d:message>
3222      <d:desc xml:lang="en">
3223        <p>The attribute is in the last call for comments stage.</p>
3224        
3225        <p>The attribute is relatively mature, though the standardization
3226        is not done yet.  It may be used for experiments.  Since it is a new
3227        feature, it might not be implemented correctly or at all.  If it is
3228        found that the feature is hard or impossible to implement, the feature
3229        might be revised or might be dropped.</p>
3230      </d:desc>
3231    </d:item>
3232    
3233    <d:item name="status:wd:attr"
3234        modules="ContentChecker">
3235      <d:message xml:lang="en">This attribute is documented in a <strong>working
3236      draft</strong>.</d:message>
3237      <d:desc xml:lang="en">
3238        <p>The attribute is documented in a working or editor's draft
3239        and not yet completed.</p>
3240        
3241        <p>The attribute should not be used for any practical purpose.
3242        The feature might be drastically changed later or might be
3243        entirely removed.</p>
3244      </d:desc>
3245    </d:item>
3246    
3247    <d:item name="status:non-standard:attr"
3248        modules="ContentChecker">
3249      <d:message xml:lang="en">This attribute is <strong>not part of any
3250      standard</strong> the conformance checker knows.</d:message>
3251      <d:desc xml:lang="en">
3252        <p>The attribute is not part of any standard or draft the conformance
3253        checker is aware of.</p>
3254        
3255        <p>The attribute should not be used for any practical purpose unless
3256        there is really a standard that defines the attribute.</p>
3257      </d:desc>
3258    </d:item>
3259    </section>
3260    
3261    <section id="langtag-errors">
3262    <h2>Language Tag Errors</h2>
3263    
3264    <d:item name="langtag:extension:duplication"
3265        modules="LangTag">
3266      <d:message xml:lang="en">There is another extension subtag
3267      <code><var>{value}</var></code>.</d:message>
3268    </d:item>
3269    
3270    <d:item name="langtag:illegal"
3271        modules="LangTag">
3272      <d:message xml:lang="en">Subtag <code><var>{value}</var></code> is
3273      syntactically invalid.</d:message>
3274    </d:item>
3275    
3276    <d:item name="langtag:language:case"
3277        modules="LangTag">
3278      <d:message xml:lang="en">It is a good practice to represent ISO 639-1
3279      language code <code><var>{value}</var></code> in lowercase.</d:message>
3280    </d:item>
3281    
3282    <d:item name="langtag:language:mul"
3283        modules="LangTag">
3284      <d:message xml:lang="en">Langauge tag <code>mul</code> should not be
3285      used.</d:message>
3286    </d:item>
3287    
3288    <d:item name="langtag:language:nosemantics"
3289        modules="LangTag">
3290      <d:message xml:lang="en">No semantics is defined for language subtag
3291      <code><var>{value}</var></code>.</d:message>
3292    </d:item>
3293    
3294    <d:item name="langtag:language:syntax"
3295        modules="LangTag">
3296      <d:message xml:lang="en">The language subtag <code><var>{value}</var></code>
3297      is syntactically invalid.</d:message>
3298    </d:item>
3299    
3300    <d:item name="langtag:language:und"
3301        modules="LangTag">
3302      <d:message xml:lang="en">Langauge tag <code>und</code> should not be
3303      used.</d:message>
3304    </d:item>
3305    
3306    <d:item name="langtag:private"
3307        modules="LangTag">
3308      <d:message xml:lang="en">It would be better if a private use language
3309      tag (<code><var>{value}</var></code>) is not used.</d:message>
3310    </d:item>
3311    
3312    <d:item name="langtag:privateuse:syntax"
3313        modules="LangTag">
3314      <d:message xml:lang="en">Private use subtag <code><var>{value}</var></code>
3315      is syntactically invalid.</d:message>
3316    </d:item>
3317    
3318    <d:item name="langtag:region:case"
3319        modules="LangTag">
3320      <d:message xml:lang="en">It is a good practice to represent ISO 3166
3321      country code <code><var>{value}</var></code> in uppercase.</d:message>
3322    </d:item>
3323    
3324    <d:item name="langtag:region:nosemantics"
3325        modules="LangTag">
3326      <d:message xml:lang="en">No semantics is defined for region subtag
3327      <code><var>{value}</var></code>.</d:message>
3328    </d:item>
3329    
3330    <d:item name="langtag:region:private"
3331        modules="LangTag">
3332      <d:message xml:lang="en">Use of private use country code
3333      <code><var>{value}</var></code> is not allowed.</d:message>
3334    </d:item>
3335    
3336    </section>
3337    
3338    <section id="rdfxml-errors">
3339    <h2>RDF/XML Errors</h2>
3340    
3341    <d:item name="bad rdf namespace"
3342        modules="RDFXML">
3343      <d:message xml:lang="en">The namespace URI of an element that
3344      represents an RDF concept must be
3345      <code>http://www.w3.org/1999/02/22-rdf-syntax-ns#</code>.</d:message>
3346    </d:item>
3347    
3348    <d:item name="duplicate rdf id"
3349        modules="RDFXML">
3350      <d:message xml:lang="en">The specified value is already used as an
3351      ID.</d:message>
3352    </d:item>
3353    
3354    <d:item name="duplicate unqualified attr"
3355        modules="RDFXML">
3356      <d:message xml:lang="en">Both unqualified attribute and namespace‐qualified
3357      RDF attribute are specified, which is not allowed.</d:message>
3358    </d:item>
3359    
3360    <d:item name="parse type other"
3361        modules="RDFXML">
3362      <d:message xml:lang="en">An invalid value is specified to
3363      the <code>parseType</code> attribute.</d:message>
3364    </d:item>
3365    
3366    <d:item name="second node element"
3367        modules="RDFXML">
3368      <d:message xml:lang="en">There is another element, such that
3369      this element is not allowed.</d:message>
3370    </d:item>
3371    
3372    <d:item name="unqualified attr"
3373        modules="RDFXML">
3374      <d:message xml:lang="en">Unqualified attribute is not allowed.</d:message>
3375    </d:item>
3376    
3377    <d:item name="unqualified rdf attr"
3378        modules="RDFXML">
3379      <d:message xml:lang="en">RDF attribute should be
3380      namespace‐qualified.</d:message>
3381    </d:item>
3382    
3383  </section>  </section>
3384    
3385  <section id="unsupported-messages">  <section id="unsupported-messages">
3386  <h2><i>Unsupported</i> Messages</h2>  <h2><i>Unsupported</i> Messages</h2>
3387    
3388  <d:item name="unsupported:attribute"  <d:item name="unknown element"
3389      class="unsupported">      modules="ContentChecker">
3390    <d:message xml:lang="en">This attribute is not supported by the    <d:message xml:lang="en">Conformance checking for element
3391    conformance checker; <em>it might or might not be conforming</em>.</d:message>    <code><var>{local-name}</var></code> is not supported; <em>it might or
3392      might not be conforming</em>.</d:message>
3393    <d:desc xml:lang="en">    <d:desc xml:lang="en">
3394      <p>The conformant checker does not support the attribute.      <p>The conformant checker does not support the element.
3395      It cannot determine whether the document is conforming or not.</p>      It cannot determine whether the document is conforming or not.</p>
3396    </d:desc>    </d:desc>
3397  </d:item>  </d:item>
3398    
3399  <d:item name="unsupported:element"  <d:item name="unknown attribute"
3400      class="unsupported">      modules="ContentChecker ContentChecker::HTML ContentChecker::Atom">
3401    <d:message xml:lang="en">This element is not supported by the    <d:message xml:lang="en">Conformance checking for attribute
3402    conformance checker; <em>it might or might not be conforming</em>.</d:message>    <code><var>{local-name}</var></code> of element
3403      <code><var>{element-local-name}</var></code> is not supported;
3404      <em>it might or might not be conforming</em>.</d:message>
3405    <d:desc xml:lang="en">    <d:desc xml:lang="en">
3406      <p>The conformant checker does not support the element.      <p>The conformant checker does not support the attribute.
3407      It cannot determine whether the document is conforming or not.</p>      It cannot determine whether the document is conforming or not.</p>
3408    </d:desc>    </d:desc>
3409  </d:item>  </d:item>
3410    
3411  <d:item name="unsupported:link type"  <d:item name="unknown link type"
3412      class="unsupported">      modules="ContentChecker::HTML">
3413    <d:message xml:lang="en">The link type <code>$0</code> is not standardized    <d:message xml:lang="en">Link type <code><var>{value}</var></code> is not
3414    or registered at the time of the release of the conformance checker;    standardized or registered at the time of the release of the conformance
3415    <em>it is non-conforming unless it has now been registered</em>.</d:message>    checker; <em>it is non-conforming unless it now has been
3416      registered</em>.</d:message>
3417    <d:desc xml:lang="en">    <d:desc xml:lang="en">
3418      <p>The <code>rel</code> attribute is defined as a list of link types.      <p>The <code>rel</code> attribute is defined as a list of link types.
3419      Some common link types are defined in the HTML5 specification.      Some common link types are defined in the HTML5 specification.
# Line 214  m:URI::syntax error;must;This IRI is not Line 3425  m:URI::syntax error;must;This IRI is not
3425      The link type might have been added to the registry since then.      The link type might have been added to the registry since then.
3426      In such case it might be conforming.  Otherwise, the      In such case it might be conforming.  Otherwise, the
3427      document is non-conforming.</p>      document is non-conforming.</p>
3428    
3429        <dl>
3430        <dt>Link types <code>shortcut icon</code></dt>
3431            <dd>Link type <code>shortcut</code> is not registered.
3432            Use only <code>icon</code> for linking to so-called favicon.</dd>
3433        </dl>
3434      </d:desc>
3435    </d:item>
3436    
3437    <d:item name="event handler"
3438        modules="ContentChecker::HTML">
3439      <d:message xml:lang="en">Conformance checking for event handler attribute
3440      is not supported; <em>it might or might not be conforming.</em></d:message>
3441    </d:item>
3442    
3443    <d:item name="media query"
3444        modules="ContentChecker::HTML">
3445      <d:message xml:lang="en">Conformance checking for media query
3446      is not supported; <em>it might or might not be conforming.</em></d:message>
3447    </d:item>
3448    
3449    <d:item name="addr-spec not supported"
3450        modules="ContentChecker::Atom">
3451      <d:message xml:lang="en">Conformance checking for an <code>addr-spec</code>
3452      is not supported; <em>it might or might not be conforming.</em></d:message>
3453    </d:item>
3454    
3455    <d:item name="XML script lang"
3456        modules="ContentChecker::HTML">
3457      <d:message xml:lang="en">Conformance checking for script
3458      language <code><var>{text}</var></code> is not supported;
3459      <em>it might or might not be conforming.</em></d:message>
3460    </d:item>
3461    
3462    <d:item name="XML style lang"
3463        modules="ContentChecker::HTML">
3464      <d:message xml:lang="en">Conformance checking for style
3465      language <code><var>{text}</var></code> is not supported;
3466      <em>it might or might not be conforming.</em></d:message>
3467    </d:item>
3468    
3469    <d:item name="atom|content not supported"
3470        modules="ContentChecker::Atom">
3471      <d:message xml:lang="en">Conformance checking for an Atom
3472      <code>content</code> element with <code>type</code>
3473      <code><var>{text}</var></code> is not supported.</d:message>
3474    </d:item>
3475    
3476    <d:item name="help not available"
3477        modules="cc-script">
3478      <d:message xml:lang="en">No more information is available.</d:message>
3479      <d:message xml:lang="ja">これ以上の詳しい情報はありません。</d:message>
3480      <d:desc xml:lang="en">
3481        <p>No more information is available for this topic.</p>
3482      </d:desc>
3483      <d:desc xml:lang="ja">
3484        <p>これについての詳しい情報はありません。</p>
3485    </d:desc>    </d:desc>
3486  </d:item>  </d:item>
3487    
3488  </section>  </section>
3489    
3490    <d:cat name="Input">
3491      <d:text xml:lang="en">Input</d:text>
3492      <d:text xml:lang="ja">入力</d:text>
3493    </d:cat>
3494    
3495    <d:cat name="By URL">
3496      <d:text xml:lang="en">By URL</d:text>
3497      <d:text xml:lang="ja">URL で指定</d:text>
3498    </d:cat>
3499    
3500    <d:cat name="By direct input">
3501      <d:text xml:lang="en">By direct input</d:text>
3502      <d:text xml:lang="ja">直接入力</d:text>
3503    </d:cat>
3504    
3505    <d:cat name="Options">
3506      <d:text xml:lang="en">More options</d:text>
3507      <d:text xml:lang="ja">検査オプション</d:text>
3508    </d:cat>
3509    
3510    <d:cat name="Check error page">
3511      <d:text xml:lang="en">Check an error page</d:text>
3512      <d:text xml:lang="ja">誤り頁を検査する</d:text>
3513    </d:cat>
3514    
3515    <d:cat name="Content type">
3516      <d:text xml:lang="en">Content type</d:text>
3517      <d:text xml:lang="ja">内容型</d:text>
3518    </d:cat>
3519    
3520    <d:cat name="Charset">
3521      <d:text xml:lang="en">Character encoding</d:text>
3522      <d:text xml:lang="ja">文字符号化</d:text>
3523    </d:cat>
3524    
3525    <d:cat name="As specified">
3526      <d:text xml:lang="en">As specified</d:text>
3527      <d:text xml:lang="ja">指定通り</d:text>
3528    </d:cat>
3529    
3530    <d:cat name="Japanese charsets">
3531      <d:text xml:lang="en">Japanese character encodings</d:text>
3532      <d:text xml:lang="ja">日本語用文字符号化</d:text>
3533    </d:cat>
3534    
3535    <d:cat name="European charsets">
3536      <d:text xml:lang="en">European character encodings</d:text>
3537      <d:text xml:lang="ja">欧米言語用文字符号化</d:text>
3538    </d:cat>
3539    
3540    <d:cat name="Asian charsets">
3541      <d:text xml:lang="en">Asian character encodings</d:text>
3542      <d:text xml:lang="ja">アジア諸語用文字符号化</d:text>
3543    </d:cat>
3544    
3545    <d:cat name="Unicode charsets">
3546      <d:text xml:lang="en">Unicode character encodings</d:text>
3547      <d:text xml:lang="ja">Unicode 系文字符号化</d:text>
3548    </d:cat>
3549    
3550    <d:cat name="Document source to check">
3551      <d:text xml:lang="en">Document source to check</d:text>
3552      <d:text xml:lang="ja">検査する文書のソース</d:text>
3553    </d:cat>
3554    
3555    <d:cat name="Check">
3556      <d:text xml:lang="en">Check</d:text>
3557      <d:text xml:lang="ja">検査</d:text>
3558    </d:cat>
3559    
3560    <d:cat name="Setting innerHTML">
3561      <d:text xml:lang="en">Setting <code>innerHTML</code> of HTML element</d:text>
3562      <d:text xml:lang="ja"><code>innerHTML</code> に値を設定する HTML 要素</d:text>
3563    </d:cat>
3564    
3565    <d:cat name="Information">
3566      <d:text xml:lang="en">Information</d:text>
3567      <d:text xml:lang="ja">情報</d:text>
3568    </d:cat>
3569    
3570    <d:cat name="HTTP Header">
3571      <d:text xml:lang="en"><abbr title="Hypertext Transfer Protocol">HTTP</abbr>
3572          Header</d:text>
3573      <d:text xml:lang="ja"><abbr lang="en" title="Hypertext Transfer Protocol">HTTP</abbr>
3574          頭部</d:text>
3575    </d:cat>
3576    
3577    <d:cat name="Parse Errors Section">
3578      <d:text xml:lang="en">Parse Errors</d:text>
3579      <d:text xml:lang="ja">構文誤り</d:text>
3580    </d:cat>
3581    
3582    <d:cat name="Parse Errors">
3583      <d:text xml:lang="en">Parse Errors</d:text>
3584      <d:text xml:lang="ja">構文誤り</d:text>
3585    </d:cat>
3586    
3587    <d:cat name="Document Source">
3588      <d:text xml:lang="en">Document Source</d:text>
3589      <d:text xml:lang="ja">文書のソース</d:text>
3590    </d:cat>
3591    
3592    <d:cat name="Source">
3593      <d:text xml:lang="en">Source</d:text>
3594      <d:text xml:lang="ja">ソース</d:text>
3595    </d:cat>
3596    
3597    <d:cat name="Tables Section">
3598      <d:text xml:lang="en">Structure of Tables</d:text>
3599      <d:text xml:lang="ja">表の構造</d:text>
3600    </d:cat>
3601    
3602    <d:cat name="Tables">
3603      <d:text xml:lang="en">Tables</d:text>
3604      <d:text xml:lang="ja">表</d:text>
3605    </d:cat>
3606    
3607    <d:cat name="Document Tree">
3608      <d:text xml:lang="en">Document Tree</d:text>
3609      <d:text xml:lang="ja">文書木</d:text>
3610    </d:cat>
3611    
3612    <d:cat name="Tree">
3613      <d:text xml:lang="en">Tree</d:text>
3614      <d:text xml:lang="ja">木</d:text>
3615    </d:cat>
3616    
3617    <d:cat name="Document">
3618      <d:text xml:lang="en">Document</d:text>
3619      <d:text xml:lang="ja">文書</d:text>
3620    </d:cat>
3621    
3622    <d:cat name="Document Structure">
3623      <d:text xml:lang="en">Document Structure</d:text>
3624      <d:text xml:lang="ja">文書構造</d:text>
3625    </d:cat>
3626    
3627    <d:cat name="Structure">
3628      <d:text xml:lang="en">Structure</d:text>
3629      <d:text xml:lang="ja">構造</d:text>
3630    </d:cat>
3631    
3632    <d:cat name="Reformatted Document Source">
3633      <d:text xml:lang="en">Reformatted Document Source</d:text>
3634      <d:text xml:lang="ja">再整形した文書のソース</d:text>
3635    </d:cat>
3636    
3637    <d:cat name="Reformatted">
3638      <d:text xml:lang="en">Reformatted</d:text>
3639      <d:text xml:lang="ja">再整形</d:text>
3640    </d:cat>
3641    
3642    <d:cat name="RDF Triples">
3643      <d:text xml:lang="en"><abbr>RDF</abbr> Triples</d:text>
3644      <d:text xml:lang="ja"><abbr lang="en">RDF</abbr> 三項組</d:text>
3645    </d:cat>
3646    
3647    <d:cat name="RDF">
3648      <d:text xml:lang="en"><abbr>RDF</abbr></d:text>
3649      <d:text xml:lang="ja"><abbr lang="en">RDF</abbr></d:text>
3650    </d:cat>
3651    
3652    <d:cat name="Structural Errors">
3653      <d:text xml:lang="en">Structural Errors</d:text>
3654      <d:text xml:lang="ja">構造的誤り</d:text>
3655    </d:cat>
3656    
3657    <d:cat name="Struct. Errors">
3658      <d:text xml:lang="en">Struct. Errors</d:text>
3659      <d:text xml:lang="ja">構造誤り</d:text>
3660    </d:cat>
3661    
3662    <d:cat name="Transfer Errors">
3663      <d:text xml:lang="en">Transfer Errors</d:text>
3664      <d:text xml:lang="ja">転送誤り</d:text>
3665    </d:cat>
3666    
3667    <d:cat name="Trans. Errors">
3668      <d:text xml:lang="en">Trans. Errors</d:text>
3669      <d:text xml:lang="ja">転送誤り</d:text>
3670    </d:cat>
3671    
3672    <d:cat name="Result">
3673      <d:text xml:lang="en">Result</d:text>
3674      <d:text xml:lang="ja">結果</d:text>
3675    </d:cat>
3676    
3677    <d:cat name="manakaiCompatMode:quirks">
3678      <d:text xml:lang="en">Quirks Mode</d:text>
3679      <d:text xml:lang="ja">奇癖モード</d:text>
3680    </d:cat>
3681    
3682    <d:cat name="manakaiCompatMode:limited quirks">
3683      <d:text xml:lang="en">Limited Quirks Mode</d:text>
3684      <d:text xml:lang="ja">限定奇癖モード</d:text>
3685    </d:cat>
3686    
3687    <d:cat name="manakaiCompatMode:no quirks">
3688      <d:text xml:lang="en">No Quirks Mode</d:text>
3689      <d:text xml:lang="ja">無奇癖モード</d:text>
3690    </d:cat>
3691    
3692    <d:cat name="manakaiIsHTML:1">
3693      <d:text xml:lang="en">HTML Document</d:text>
3694      <d:text xml:lang="ja">HTML 文書</d:text>
3695    </d:cat>
3696    
3697    <d:cat name="manakaiIsHTML:0">
3698      <d:text xml:lang="en">XML Document</d:text>
3699      <d:text xml:lang="ja">XML 文書</d:text>
3700    </d:cat>
3701    
3702    <d:cat name="manakaiCharset">
3703      <d:text xml:lang="en"><code>charset</code> parameter</d:text>
3704      <d:text xml:lang="ja"><code lang="en">charset</code> 引数</d:text>
3705    </d:cat>
3706    
3707    <d:cat name="inputEncoding">
3708      <d:text xml:lang="en">Input character encoding</d:text>
3709      <d:text xml:lang="ja">入力に用いた文字符号化</d:text>
3710    </d:cat>
3711    
3712    <d:cat name="xmlVersion">
3713      <d:text xml:lang="en">XML <code>version</code></d:text>
3714      <d:text xml:lang="ja">XML <code lang="en">version</code></d:text>
3715    </d:cat>
3716    
3717    <d:cat name="xmlEncoding">
3718      <d:text xml:lang="en">XML <code>encoding</code></d:text>
3719      <d:text xml:lang="ja">XML <code lang="en">encoding</code></d:text>
3720    </d:cat>
3721    
3722    <d:cat name="xmlStandalone">
3723      <d:text xml:lang="en">XML <code>standalone</code></d:text>
3724      <d:text xml:lang="ja">XML <code lang="en">standalone</code></d:text>
3725    </d:cat>
3726    
3727    <d:cat name="... with BOM">
3728      <d:text xml:lang="en"> (with <code class="charname"><abbr title="BYTE ORDER MARK">BOM</abbr></code>)</d:text>
3729      <d:text xml:lang="ja"> (<code class="charname" lang="en"><abbr title="BYTE ORDER MARK">BOM</abbr></code> つき)</d:text>
3730    </d:cat>
3731    
3732    <d:cat name="URL">
3733      <d:text xml:lang="en"><abbr title="Uniform Resource Locator">URL</abbr></d:text>
3734      <d:text xml:lang="ja"><abbr title="統一資源所在子">URL</abbr></d:text>
3735    </d:cat>
3736    
3737    <d:cat name="URLs">
3738      <d:text xml:lang="en"><abbr title="Uniform Resource Locators">URLs</abbr></d:text>
3739      <d:text xml:lang="ja"><abbr title="統一資源所在子">URL</abbr></d:text>
3740    </d:cat>
3741    
3742    <d:cat name="Container Node">
3743      <d:text xml:lang="en">Container Node</d:text>
3744      <d:text xml:lang="ja">この文書を含む節点</d:text>
3745    </d:cat>
3746    
3747    <d:cat name="Table Element">
3748      <d:text xml:lang="en">Table Element</d:text>
3749      <d:text xml:lang="ja">表要素</d:text>
3750    </d:cat>
3751    
3752    <d:cat name="Base URL">
3753      <d:text xml:lang="en">Base URL</d:text>
3754      <d:text xml:lang="ja">基底 URL</d:text>
3755    </d:cat>
3756    
3757    <d:cat name="Internet Media Type">
3758      <d:text xml:lang="en">Internet Media Type</d:text>
3759      <d:text xml:lang="ja">インターネット媒体型</d:text>
3760    </d:cat>
3761    
3762    <d:cat name="Character Encoding">
3763      <d:text xml:lang="en">Character Encoding</d:text>
3764      <d:text xml:lang="ja">文字符号化</d:text>
3765    </d:cat>
3766    
3767    <d:cat name="Byte Length">
3768      <d:text xml:lang="en">Byte Length</d:text>
3769      <d:text xml:lang="ja">バイト長</d:text>
3770    </d:cat>
3771    
3772    <d:cat name="Character Length">
3773      <d:text xml:lang="en">Character Length</d:text>
3774      <d:text xml:lang="ja">文字長</d:text>
3775    </d:cat>
3776    
3777    <d:cat name="... overridden">
3778      <d:text xml:lang="en"> (<i>overridden</i>)</d:text>
3779      <d:text xml:lang="ja"> (<i>上書き</i>)</d:text>
3780    </d:cat>
3781    
3782    <d:cat name="... overridden, official type is #">
3783      <d:text xml:lang="en"> (<i>overridden</i>; official type is
3784          <code lang="en" class="MIME"><var>{text}</var></code>)</d:text>
3785      <d:text xml:lang="ja"> (<i>上書き</i>, 公式型は
3786          <code lang="en" class="MIME"><var>{text}</var></code>)</d:text>
3787    </d:cat>
3788    
3789    <d:cat name="... sniffed">
3790      <d:text xml:lang="en"> (<i>sniffed</i>)</d:text>
3791      <d:text xml:lang="ja"> (<i>探知結果</i>)</d:text>
3792    </d:cat>
3793    
3794    <d:cat name="byte">
3795      <d:text xml:lang="en">byte</d:text>
3796      <d:text xml:lang="ja">バイト</d:text>
3797    </d:cat>
3798    
3799    <d:cat name="bytes">
3800      <d:text xml:lang="en">bytes</d:text>
3801      <d:text xml:lang="ja">バイト</d:text>
3802    </d:cat>
3803    
3804    <d:cat name="Explicit entries">
3805      <d:text xml:lang="en">Explicit entries</d:text>
3806      <d:text xml:lang="ja">明示的項目</d:text>
3807    </d:cat>
3808    
3809    <d:cat name="Fallback entries">
3810      <d:text xml:lang="en">Fallback entries</d:text>
3811      <d:text xml:lang="ja">滑り止め項目</d:text>
3812    </d:cat>
3813    
3814    <d:cat name="Opportunistic caching namespace">
3815      <d:text xml:lang="en">Opportunistic caching namespace</d:text>
3816      <d:text xml:lang="ja">日和見的キャッシュ化名前空間</d:text>
3817    </d:cat>
3818    
3819    <d:cat name="Fallback entry">
3820      <d:text xml:lang="en">Fallback entry</d:text>
3821      <d:text xml:lang="ja">滑り止め項目</d:text>
3822    </d:cat>
3823    
3824    <d:cat name="Online whitelist">
3825      <d:text xml:lang="en">Online whitelist</d:text>
3826      <d:text xml:lang="ja">オンライン・ホワイトリスト</d:text>
3827    </d:cat>
3828    
3829    <d:cat name="No entry">
3830      <d:text xml:lang="en">No entry</d:text>
3831      <d:text xml:lang="ja">項目なし</d:text>
3832    </d:cat>
3833    
3834    <d:cat name="Subject">
3835      <d:text xml:lang="en">Subject</d:text>
3836      <d:text xml:lang="ja">主語</d:text>
3837    </d:cat>
3838    
3839    <d:cat name="Predicate">
3840      <d:text xml:lang="en">Predicate</d:text>
3841      <d:text xml:lang="ja">述語</d:text>
3842    </d:cat>
3843    
3844    <d:cat name="Object">
3845      <d:text xml:lang="en">Object</d:text>
3846      <d:text xml:lang="ja">目的語</d:text>
3847    </d:cat>
3848    
3849    <d:cat name="character">
3850      <d:text xml:lang="en">character</d:text>
3851      <d:text xml:lang="ja">文字</d:text>
3852    </d:cat>
3853    
3854    <d:cat name="characters">
3855      <d:text xml:lang="en">characters</d:text>
3856      <d:text xml:lang="ja">文字</d:text>
3857    </d:cat>
3858    
3859    <d:cat name="Line #">
3860      <d:text xml:lang="en">Line <var>{text}</var></d:text>
3861      <d:text xml:lang="ja"><var>{text}</var> 行</d:text>
3862    </d:cat>
3863    
3864    <d:cat name="column #">
3865      <d:text xml:lang="en">column <var>{text}</var></d:text>
3866      <d:text xml:lang="ja"><var>{text}</var> 列</d:text>
3867    </d:cat>
3868    
3869    <d:cat name="Index #">
3870      <d:text xml:lang="en">Index <var>{text}</var></d:text>
3871      <d:text xml:lang="ja">索引 #<var>{text}</var></d:text>
3872    </d:cat>
3873    
3874    <d:cat name="Unknown location">
3875      <d:text xml:lang="en">Unknown location</d:text>
3876      <d:text xml:lang="ja">位置不明</d:text>
3877    </d:cat>
3878    
3879    <d:cat name="(unknown)">
3880      <d:text xml:lang="en">(Unknown)</d:text>
3881      <d:text xml:lang="ja">(不明)</d:text>
3882    </d:cat>
3883    
3884    <d:cat name="Description">
3885      <d:text xml:lang="en">Description</d:text>
3886      <d:text xml:lang="ja">説明</d:text>
3887    </d:cat>
3888    
3889    <d:cat name="Table #">
3890      <d:text xml:lang="en">Structure of Table #<var>{text}</var></d:text>
3891      <d:text xml:lang="ja">表 #<var>{text}</var> の構造</d:text>
3892    </d:cat>
3893    
3894    <d:cat name="Subdocument #">
3895      <d:text xml:lang="en">Subdocument #<var>{text}</var></d:text>
3896      <d:text xml:lang="ja">部分文書 #<var>{text}</var></d:text>
3897    </d:cat>
3898    
3899    <d:cat name="Sub #">
3900      <d:text xml:lang="en">Sub #<var>{text}</var></d:text>
3901      <d:text xml:lang="ja">部分 #<var>{text}</var></d:text>
3902    </d:cat>
3903    
3904    <d:cat name="...">
3905      <d:text xml:lang="en">..</d:text><!-- TODO: figure hyphen? -->
3906      <d:text xml:lang="ja">〜</d:text>
3907    </d:cat>
3908    
3909    <d:cat name="Score">
3910      <d:text xml:lang="en">Score</d:text>
3911      <d:text xml:lang="ja">得点</d:text>
3912    </d:cat>
3913    
3914    <d:cat name="Subtotal">
3915      <d:text xml:lang="en">Subtotal</d:text>
3916      <d:text xml:lang="ja">小計</d:text>
3917    </d:cat>
3918    
3919    <d:cat name="Total">
3920      <d:text xml:lang="en">Total</d:text>
3921      <d:text xml:lang="ja">合計</d:text>
3922    </d:cat>
3923    
3924    <d:cat name="Main document">
3925      <d:text xml:lang="en">Main document</d:text>
3926      <d:text xml:lang="ja">主文書</d:text>
3927    </d:cat>
3928    
3929    <d:cat name="Subdocuments">
3930      <d:text xml:lang="en">Subdocuments</d:text>
3931      <d:text xml:lang="ja">部分文書</d:text>
3932    </d:cat>
3933    
3934    <d:cat name="Transfer L.">
3935      <d:text xml:lang="en"><abbr title="Transfer protocol">Transfer</abbr></d:text>
3936      <d:text xml:lang="ja"><abbr title="転送プロトコル">転送</abbr></d:text>
3937    </d:cat>
3938    
3939    <d:cat name="Encode L.">
3940      <d:text xml:lang="en"><abbr title="Character encoding">Encoding</abbr></d:text>
3941      <d:text xml:lang="ja"><abbr title="文字符号化">符号</abbr></d:text>
3942    </d:cat>
3943    
3944    <d:cat name="Char L.">
3945      <d:text xml:lang="en"><abbr title="Coded characters">Character</abbr></d:text>
3946      <d:text xml:lang="ja"><abbr title="符号化文字">文字</abbr></d:text>
3947    </d:cat>
3948    
3949    <d:cat name="Syntax L.">
3950      <d:text xml:lang="en">Syntax</d:text>
3951      <d:text xml:lang="ja">構文</d:text>
3952    </d:cat>
3953    
3954    <d:cat name="Structure L.">
3955      <d:text xml:lang="en">Structure</d:text>
3956      <d:text xml:lang="ja">構造</d:text>
3957    </d:cat>
3958    
3959    <d:cat name="Semantics L.">
3960      <d:text xml:lang="en">Semantics</d:text>
3961      <d:text xml:lang="ja">意味</d:text>
3962    </d:cat>
3963    
3964    <d:cat name="N/A">
3965      <d:text xml:lang="en">N/A</d:text>
3966      <d:text xml:lang="ja">−</d:text>
3967    </d:cat>
3968    
3969    <d:cat name="No error found.">
3970      <d:text xml:lang="en">No error found.</d:text>
3971      <d:text xml:lang="ja">誤りは見つかりませんでした。</d:text>
3972    </d:cat>
3973    
3974    <d:cat name="No transfer error found.">
3975      <d:text xml:lang="en">This document has no transfer protocol header error.</d:text>
3976      <d:text xml:lang="ja">転送プロトコルの頭部に誤りは見つかりませんでした。</d:text>
3977    </d:cat>
3978    
3979    <d:cat name="No parse error found.">
3980      <d:text xml:lang="en">This document has no parse error.</d:text>
3981      <d:text xml:lang="ja">構文解析中に誤りは見つかりませんでした。</d:text>
3982    </d:cat>
3983    
3984    <d:cat name="No structural error found.">
3985      <d:text xml:lang="en">This document has no structral error.</d:text>
3986      <d:text xml:lang="ja">構造上の誤りは見つかりませんでした。</d:text>
3987    </d:cat>
3988    
3989    <d:cat name="This checker is work in progress.">
3990      <d:text xml:lang="en">
3991        <p><strong>Important</strong>: This conformance checking service
3992        is <em>under development</em>.  The result above might be <em>wrong</em>.</p>
3993      </d:text>
3994      <d:text xml:lang="ja">
3995        <p><strong>重要</strong>: この適合性検査サービスは<em>開発中</em>です。
3996        この結果は<em>間違い</em>かもしれません。</p>
3997      </d:text>
3998    </d:cat>
3999    
4000    <d:cat name="Conformance is conforming">
4001      <d:text xml:lang="en">No conformance‐error is
4002          found in this document.</d:text>
4003      <d:text xml:lang="ja">この文書に適合性に関わる誤りは見つかりませんでした。</d:text>
4004    </d:cat>
4005    
4006    <d:cat name="Conformance is should-error">
4007      <d:text xml:lang="en">This document
4008            is <strong>likely <em>non</em>-conforming</strong>, but in rare case
4009            it might be conforming.  The checker cannot determine whether
4010            this document is in the rare case or not.</d:text>
4011      <d:text xml:lang="ja">この文書は<strong>おそらく<em>不</em>適合</strong>ですが、
4012          稀に適合している場合もあります。適合性検査器はこの文書が稀な場合に該当するかどうか判定できません。</d:text>
4013    </d:cat>
4014    
4015    <d:cat name="Conformance is non-conforming">
4016      <d:text xml:lang="en">This document is
4017            <strong><em>non</em>-conforming</strong>.</d:text>
4018      <d:text xml:lang="ja">この文書は<strong><em>不</em>適合</strong>です。</d:text>
4019    </d:cat>
4020    
4021    <d:cat name="Conformance is uncertain">
4022      <d:text xml:lang="en">The conformance
4023            checker cannot decide whether the document is conforming or
4024            not, since the document contains one or more unsupported
4025            features.  The document might or might not be conforming.</d:text>
4026      <d:text xml:lang="ja">適合性検査器はこの文書が適合するかどうか判定できませんでした。
4027          この文書は適合性検査器が対応していない機能を使っています。
4028          この文書は適合しているかもしれませんし、していないかもしれません。</d:text>
4029    </d:cat>
4030    
4031    <d:cat name="Error level m">
4032      <d:text xml:lang="en"><a href="../error-description#Error-level-m" rel="help"><em class="rfc2119">MUST</em>‐level
4033            error</a></d:text>
4034      <d:text xml:lang="ja"><a href="../error-description#Error-level-m" rel="help"><em class="rfc2119" title="REQUIRED">必須</em>級の誤り</a></d:text>
4035      <d:desc xml:lang="en">
4036        <p>A violation to a hard requirement of the specification.
4037        The document is non‐conforming.</p>
4038      </d:desc>
4039    </d:cat>
4040    
4041    <d:cat name="Error level s">
4042      <d:text xml:lang="en"><a href="../error-description#Error-level-s" rel="help"><em class="rfc2119">SHOULD</em>‐level
4043            error</a></d:text>
4044      <d:text xml:lang="ja"><a href="../error-description#Error-level-s" rel="help"><em class="rfc2119" title="RECOMMENDED">推奨</em>級の誤り</a></d:text>
4045      <d:desc xml:lang="en">
4046        <p>A violation to a requirement of the specification.
4047        The violation might be legitimize in some case.  Otherwise,
4048        the document is non‐conforming.</p>
4049      </d:desc>
4050    </d:cat>
4051    
4052    <d:cat name="Error level w">
4053      <d:text xml:lang="en"><a href="../error-description#Error-level-w" rel="help">Warning</a></d:text>
4054      <d:text xml:lang="ja"><a href="../error-description#Error-level-w" rel="help">警告</a></d:text>
4055      <d:desc xml:lang="en">
4056        <p>A warning is an advice from the conformance checker
4057        to avoid solving a problem in a confusing or possibly wrong way.
4058        It does not affect to the conformance of the document, and
4059        may sometimes be inappropriate.</p>
4060      </d:desc>
4061    </d:cat>
4062    
4063    <d:cat name="Error level i">
4064      <d:text xml:lang="en"><a href="../error-description#Error-level-i" rel="help">Information</a></d:text>
4065      <d:text xml:lang="ja"><a href="../error-description#Error-level-i" rel="help">情報</a></d:text>
4066      <d:desc xml:lang="en">
4067        <p>An informational message just provides an additional information
4068        on the feature used in the document or the status of the retrieval
4069        or so on.
4070        It does not affect to the conformance of the document.</p>
4071      </d:desc>
4072    </d:cat>
4073    
4074    <d:cat name="Error level u">
4075      <d:text xml:lang="en"><a href="../error-description#Error-level-u" rel="help">Not
4076          supported</a></d:text>
4077      <d:text xml:lang="ja"><a href="../error-description#Error-level-u" rel="help">未対応</a></d:text>
4078      <d:desc xml:lang="en">
4079        <p>Some feature that is not supported by the conformance checker
4080        is used in the document.</p>
4081      </d:desc>
4082    </d:cat>
4083    
4084  <section id="license">  <section id="license">
4085  <h2>License of This Document</h2>  <h2>License of This Document</h2>
4086    
4087  <p>Copyright 2007 <a href="http://suika.fam.cx/~wakaba/who?">Wakaba</a></p>  <p>Copyright <time>2007</time>‐<time>2008</time>
4088  <p>This library is free software; you can redistribute it  <a href="http://suika.fam.cx/~wakaba/who?" rel="author" xml:lang="ja">Wakaba</a>
4089    <code class="mail">&lt;<a href="mailto:w@suika.fam.cx">w@suika.fam.cx</a>></code>.</p>
4090    
4091    <p>This document is free software; you can redistribute it
4092  and/or modify it under the same terms as Perl itself.</p>  and/or modify it under the same terms as Perl itself.</p>
4093  </section>  </section>
4094    
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