/[pub]/test/html-webhacc/error-description-source.xml
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revision 1.3 by wakaba, Mon Jul 16 10:55:11 2007 UTC revision 1.6 by wakaba, Sat Jul 21 04:58:17 2007 UTC
# Line 63  Web Document Conformance Checker (BETA)< Line 63  Web Document Conformance Checker (BETA)<
63    </d:desc>    </d:desc>
64  </d:item>  </d:item>
65    
66    <d:item name="bare stago"
67        class="tokenize-error">
68      <d:message xml:lang="en">A <code>&lt;</code> character is not followed
69      by tag name or by a <code>!</code> character.</d:message>
70      <d:desc xml:lang="en">
71        <p>A <code>&lt;</code> (<code>U+003C</code>
72        <code class="charname">LESS-THAN SIGN</code>) character which is not part
73        of any markup appears in the input stream.</p>
74    
75        <p>The <code>&lt;</code> character as a data character must
76        be escaped as:
77        <pre class="html example"><code>&amp;lt;</code></pre>
78        </p>
79      </d:desc>
80    </d:item>
81    
82  <d:item name="bare nero"  <d:item name="bare nero"
83      class="tokenize-error">      class="tokenize-error">
84    <d:message xml:lang="en">The decimal representation of the code position    <d:message xml:lang="en">The decimal representation of the code position
# Line 76  Web Document Conformance Checker (BETA)< Line 92  Web Document Conformance Checker (BETA)<
92      The document is non-conforming.</p>      The document is non-conforming.</p>
93    
94      <p>The string <code>&amp;#</code> must be the first two characters      <p>The string <code>&amp;#</code> must be the first two characters
     <code>NUMBER SIGN</code>) character must be the first two characters  
95      of a reference:      of a reference:
96        <dl>        <dl>
97        <dt>Numeric character reference</dt>        <dt>Numeric character reference</dt>
# Line 91  Web Document Conformance Checker (BETA)< Line 106  Web Document Conformance Checker (BETA)<
106      </p>      </p>
107    
108      <p>To represent <code>&amp;#</code> as data characters, use      <p>To represent <code>&amp;#</code> as data characters, use
109      named entity reference:      a named entity reference for the <code>&amp;</code> character:
110        <pre class="html example"><code>&amp;amp;#</code></pre>        <pre class="html example"><code>&amp;amp;#</code></pre>
111      </p>      </p>
112    </d:desc>    </d:desc>
# Line 113  Web Document Conformance Checker (BETA)< Line 128  Web Document Conformance Checker (BETA)<
128      of the code point of the character to be referenced.</p>      of the code point of the character to be referenced.</p>
129    
130      <p>To represent <code>&amp;#x</code> as data characters, use      <p>To represent <code>&amp;#x</code> as data characters, use
131      named entity reference:      a named entity reference for the <code>&amp;</code> character:
132        <pre class="html example"><code>&amp;amp;#x</code></pre>        <pre class="html example"><code>&amp;amp;#x</code></pre>
133      </p>      </p>
134    </d:desc>    </d:desc>
135  </d:item>  </d:item>
136    
137    <d:item name="dash in comment"
138        class="tokenize-error">
139      <d:message xml:lang="en">There is a <code>--</code> sequence
140      in a comment.</d:message>
141      <d:desc xml:lang="en">
142        <p>There is a <code>-</code> (<code>U+002D</code>
143        <code class="charname">HYPHEN-MINUS</code>) character
144        at the end of the comment or a <code>--</code> sequence
145        in the comment.  The document is non-conforming.</p>
146    
147        <p>Comments cannot contain a string <code>--</code>, as in XML.
148        Unlike SGML, there cannot be more than one comments
149        (where <i>comment</i> is an SGML term) in the comment
150        declaration.</p>
151      </d:desc>
152    </d:item>
153    
154  <d:item name="duplicate attribute"  <d:item name="duplicate attribute"
155      class="tokenize-error">      class="tokenize-error">
156    <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
157          <code><var>$0</var></code>.</d:message>
158    <d:desc xml:lang="en">    <d:desc xml:lang="en">
159      <p>There are more than one attributes with the same      <p>There are more than one attributes with the same
160      name in a tag.  The document is non-conforming.</p>      name in a tag.  The document is non-conforming.</p>
# Line 150  Web Document Conformance Checker (BETA)< Line 183  Web Document Conformance Checker (BETA)<
183    </d:desc>    </d:desc>
184  </d:item>  </d:item>
185    
186    
187    <d:item name="pio"
188        class="tokenize-error">
189      <d:message xml:lang="en">Processing instruction
190      (<code>&lt;?<var>...</var>?></code>) cannot be used.</d:message>
191      <d:desc xml:lang="en">
192        <p>Processing instructions (<code>&lt;?<var>...</var>?></code>),
193        including XML declaration (<code>&lt;?xml <var>...</var>?></code>)
194        and XML style sheet <abbr title="processing instruction">PI</abbr>
195        (<code>&lt;xml-stylesheet <var>...</var>?></code>), are not allowed
196        in the HTML syntax.  The document is non-conforming.</p>
197    
198        <p>If it is necessary to embed a processing instruction
199        in the HTML document, you must use the XML syntax instead.</p>
200    
201        <p>In the HTML syntax, XML declaration is not necessary.</p>
202    
203        <p>Instead of XML style sheet,
204        <abbr title="processing instruction">PI</abbr>s, you must
205        use the HTML <code>link</code> element whose <code>rel</code>
206        attribute is set to <code>stylesheet</code> (or
207        <code>alternate stylesheet</code> for an aleternate style sheet).</p>
208    
209        <p>Web browsers will parse processing instructions as bogus
210        comments.  Some legacy Web browsers, such as IE:mac and
211        some mobile browsers, will display processing instructions
212        as string.</p>
213      </d:desc>
214    </d:item>
215    
216  </section>  </section>
217    
218  <section id="html5-parse-errors">  <section id="html5-parse-errors">
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229    </d:desc>    </d:desc>
230  </d:item>  </d:item>
231    
232  <d:item name="in table"  <d:item name="DOCTYPE in the middle"
233        class="parse-error">
234      <d:message xml:lang="en">A <code>DOCTYPE</code> appears after any
235      element or data character has been seen.</d:message>
236      <d:desc xml:lang="en">
237        <p>A <code>DOCTYPE</code> appears after any element or data character
238        has been seen.  The document is non-conforming.</p>
239        
240        <p>The <code>DOCTYPE</code> must be placed before any
241        tag, reference, or data character.  Only white space characters
242        and comments can be inserted before the <code>DOCTYPE</code>.</p>
243      </d:desc>
244    </d:item>
245    
246    <d:item name="in a:a"
247        class="parse-error">
248      <d:message xml:lang="en">Anchor cannot be nested.</d:message>
249      <d:desc xml:lang="en">
250        <p>HTML <code>a</code> elements cannot be nested.
251        The document is non-conforming.</p>
252    
253        <p>In the HTML syntax, a start tag of the <code>a</code>
254        implies the end tag of any opening <code>a</code> element.</p>
255      </d:desc>
256    </d:item>
257    
258    <d:item name="in body"
259      class="parse-error">      class="parse-error">
260    <d:message xml:lang="en">Tag <code>&lt;<var>$0</var>&gt;</code>    <d:message xml:lang="en">Tag <code>&lt;<var>$0</var>&gt;</code>
261    is not allowed in <code>table</code>.</d:message>    is not allowed in a <code>body</code> element.</d:message>
262    <d:desc xml:lang="en">    <d:desc xml:lang="en">
263      <p>The start or end tag of an element appears in <code>table</code>.      <p>The start or end tag of an element, which
264        cannot be a descendant of <code>body</code> element, appears
265        in the input stream while the <code>body</code> element has been opened.
266      The document is non-conforming.</p>      The document is non-conforming.</p>
267      </d:desc>
268    </d:item>
269    
270    <d:item name="in head:head"
271        class="parse-error">
272      <d:message xml:lang="en">Start tag <code>&lt;<var>head</var>&gt;</code>
273      is not allowed in the <code>head</code> element.</d:message>
274      <d:desc xml:lang="en">
275        <p>There is a start tag <code>&lt;head></code> in the
276        <code>&lt;head></code> element.  The document is non-conforming.</p>
277    
278        <p>In an HTML document there must not be more than
279        one <code>head</code> element, therefore no more than one
280        start tag <code>&lt;head></code> can appear in the input stream.</p>
281      </d:desc>
282    </d:item>
283    
284    <d:item name="in table"
285        class="parse-error">
286      <d:message xml:lang="en">Tag <code>&lt;<var>$0</var>&gt;</code>
287      is not allowed in a <code>table</code> element.</d:message>
288      <d:desc xml:lang="en">
289        <p>The start or end tag of an element, which
290        cannot be a child of <code>table</code> element, appears
291        in the input stream while the <code>table</code> element has been opened
292        but no other element has been opened.  The document is non-conforming.</p>
293    
294      <p>In <code>table</code>, only table related elements      <p>In <code>table</code>, only table related elements
295      are allowed; any other element must be contained in      are allowed; any other element must be contained in
# Line 216  Web Document Conformance Checker (BETA)< Line 333  Web Document Conformance Checker (BETA)<
333    
334  <d:item name="no DOCTYPE"  <d:item name="no DOCTYPE"
335      class="parse-error">      class="parse-error">
336    <d:message xml:lang="en">This document does not start with the    <d:message xml:lang="en">This document does not start with a
337    <code>DOCTYPE</code>.</d:message>    <code>DOCTYPE</code>.</d:message>
338    <d:desc>    <d:desc>
339      <p>The document does not start with a <code>DOCTYPE</code>.      <p>The document does not start with a <code>DOCTYPE</code>.
# Line 242  Web Document Conformance Checker (BETA)< Line 359  Web Document Conformance Checker (BETA)<
359    </d:desc>    </d:desc>
360  </d:item>  </d:item>
361    
362    <d:item name="not first start tag"
363        class="parse-error">
364      <d:message xml:lang="en">This <code>&lt;html></code> tag is not
365      the first start tag.</d:message>
366      <d:desc>
367        <p>There is a start tag of the <code>html</code> element
368        that it not the first start tag in the input stream.
369        The document is non-conforming.</p>
370    
371        <p>In an HTML document, there cannot be more than one
372        <code>html</code> element and therefore there cannot be
373        more than one <code>&lt;html></code> tag.  In addition,
374        nothing can be placed before the <code>&lt;html></code> tag
375        except a <code>DOCTYPE</code>, white space characters,
376        and comments.</p>
377      </d:desc>
378    </d:item>
379    
380  <d:item name="not HTML5"  <d:item name="not HTML5"
381      class="parse-error">      class="parse-error">
382    <d:message xml:lang="en">This document is written in an old version of    <d:message xml:lang="en">This document is written in an old version of
383    HTML.</d:message>    HTML.</d:message>
384    <d:desc xml:lang="en">    <d:desc xml:lang="en">
385      <p>The document contains a <code>DOCTYPE</code> declaration      <p>The document contains a <code>DOCTYPE</code> declaration
386      that is different from HTML5 <code>DOCTYPE</code> (i.e. <code>&lt;!DOCTYPE      that is different from HTML5 <code>DOCTYPE</code> (i.e.
387      HTML&gt;</code>).  The document is non-conforming.</p>      <code>&lt;!DOCTYPE HTML&gt;</code>).  The document is non-conforming.</p>
388    
389      <p>The document might or might not be conformant to      <p>The document might or might not be conformant to
390      some version of HTML.  However, conformance to any HTML      some version of HTML.  However, conformance to any HTML
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398      class="parse-error">      class="parse-error">
399    <d:message xml:lang="en">Element <code><var>$0</var></code> is not    <d:message xml:lang="en">Element <code><var>$0</var></code> is not
400    opened.</d:message>    opened.</d:message>
401      <d:desc>
402        <p>An end tag appears though no element with the same name
403        has been opened.  The document is non-conforming.</p>
404    
405        <p>For any end tag in HTML document, there must be a
406        corresponding start tag.</p>
407      </d:desc>
408  </d:item>  </d:item>
409    
410  </section>  </section>
# Line 279  Web Document Conformance Checker (BETA)< Line 421  Web Document Conformance Checker (BETA)<
421      context.  The document is non-conforming.</p>      context.  The document is non-conforming.</p>
422    
423      <p>Possible causes:      <p>Possible causes:
424        <dl>        <ul>
425        <dt>If the erred element is an inline-level element (such        <li><p>A data character cannot be a child
426        as <code>a</code> or <code>span</code>)</dt>        of certain sectioning elements such as <code>body</code>,
427            <dd><p>A data character cannot be a child        <code>section</code>, and <code>blockquote</code>.</p>
428            of certain sectioning elements such as <code>body</code>,  
429            <code>section</code>, and <code>blockquote</code>.</p>        <p>Any inline-level content must be put
430          in e.g. paragraph element such as <code>p</code>.</p></li>
431            <p>Any inline-level content must be put        <li><p>Though some elements such as <code>div</code>,
432            in e.g. paragraph element such as <code>p</code>.</p></dd>        <code>li</code>, and <code>td</code> allow
433        <dt>If the erred element is a block-level element (such as        <em>either one</em> of block-level or inline-level content
434        <code>div</code> or <code>h<var>n</var></code>)</dt>        is allowed.  If there is a block-level content,
435            <dd><p>Though some elements such as <code>div</code>,        any inline-level content must be put
436            <code>li</code>, and <code>td</code> allow        in e.g. paragraph element such as <code>p</code>.</p></li>
437            <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>  
438      </p>      </p>
439    </d:desc>    </d:desc>
440  </d:item>  </d:item>
# Line 345  Web Document Conformance Checker (BETA)< Line 483  Web Document Conformance Checker (BETA)<
483      <em>not</em> support form elements yet.</p>      <em>not</em> support form elements yet.</p>
484    
485      <p>Possible causes:      <p>Possible causes:
486        <dl>        <dl class="switch">
487        <dt>If the erred element is an inline-level element (such        <dt>If the element with the error is an inline-level element,
488        as <code>a</code> or <code>span</code>)</dt>        such as <code>a</code>, <code>progress</code>, or <code>img</code></dt>
489            <dd><p>An inline-level element cannot be a child            <dd><p>An inline-level element cannot be a child
490            of certain sectioning elements such as <code>body</code>,            of certain sectioning elements such as <code>body</code>,
491            <code>section</code>, and <code>blockquote</code>.</p>            <code>section</code>, and <code>blockquote</code>.</p>
492    
493            <p>Any inline-level content must be put            <p>Any inline-level content must be put
494            in e.g. paragraph element such as <code>p</code>.</p></dd>            in e.g. paragraph element such as <code>p</code>.</p></dd>
495        <dt>If the erred element is a block-level element (such as        <dt>If the element with the error is a block-level element,
496        <code>div</code> or <code>h<var>n</var></code>)</dt>        such as <code>div</code>, <code>h<var>n</var></code>, or
497          <code>section</code></dt>
498            <dd><p>Though some elements such as <code>div</code>,            <dd><p>Though some elements such as <code>div</code>,
499            <code>li</code>, and <code>td</code> allow            <code>li</code>, and <code>td</code> allow
500            <em>either one</em> of block-level or inline-level content            <em>either one</em> of block-level or inline-level content
501            is allowed.  If there is a block-level content,            is allowed.  If there is a block-level content,
502            any inline-level content must be put            any inline-level content must be put
503            in e.g. paragraph element such as <code>p</code>.</p></dd>            in e.g. paragraph element such as <code>p</code>.</p></dd>
504        <dt>If the erred element is the root <code>html</code> element</dt>        <dt>If the element with the error is a <code>noscript</code> element</dt>
505              <dd>The <code>noscript</code> element is allowed only in the context
506              where a block-level or inline-level content is expected
507              and in the <code>head</code> element.
508              It cannot be used in e.g. <code>ul</code>, <code>table</code>,
509              or <code>select</code>.</dd>
510          <dt>If the element with the error is the <code>html</code> element
511          that is the root element of an XHTML document</dt>
512            <dd><p>In an XHTML document, the root <code>html</code>            <dd><p>In an XHTML document, the root <code>html</code>
513            element must have an <code>xmlns</code> attribute            element must have an <code>xmlns</code> attribute
514            whose value is set to            whose value is set to
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518    </d:desc>    </d:desc>
519  </d:item>  </d:item>
520    
521    <d:item name="ps element missing"
522        class="content-model-error">
523      <d:message xml:lang="en">There is no <code><var>$0</var></code>
524      element before this element.</d:message>
525      <d:desc xml:lang="en">
526        <p>There must be an element before another element, but there
527        is not.  The document is non-conforming.</p>
528    
529        <p>For example, there must be a <code>dt</code> element
530        before any <code>dd</code> element.</p>
531      </d:desc>
532    </d:item>
533    
534  </section>  </section>
535    
536  <section id="attribute-errors">  <section id="attribute-errors">
# Line 402  Web Document Conformance Checker (BETA)< Line 561  Web Document Conformance Checker (BETA)<
561      <p>The <code>xml:lang</code> attribute is not allowed in      <p>The <code>xml:lang</code> attribute is not allowed in
562      HTML document.  The document is non-conforming.</p>      HTML document.  The document is non-conforming.</p>
563    
564      <p>The <code>xml:lang</code> attribute in <code>null</code>      <p>The <code>lang</code> attribute in the <code>null</code>
565      namespace for HTML elements is defined as conforming only for      namespace for HTML elements is defined as conforming <em>only</em> for
566      XML document.</p>      XML document.</p>
567    
568      <p>To specify natural language information in HTML document,      <p>To specify natural language information in HTML document,
569      use <code>lang</code> attribute instead.</p>      use <code>lang</code> attribute instead.</p>
570    
571        <p>XHTML 1.0 Appendix C was encouraged to specify both
572        <code>lang</code> and <code>xml:lang</code> attributes with
573        the same value.  Such a duplication has <em>no effect</em> in practice.
574        Use only one of <code>lang</code> (in HTML) or <code>xml:lang</code> (in
575        XML).</p>
576    
577      <!-- @@ ISSUE: xml:lang in non-HTML element in DOM5 HTML created      <!-- @@ ISSUE: xml:lang in non-HTML element in DOM5 HTML created
578           from an HTML document? -->           from an HTML document? -->
579    </d:desc>    </d:desc>
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604      XML document.  The document is non-conforming.</p>      XML document.  The document is non-conforming.</p>
605    
606      <p>The <code>lang</code> attribute in <code>null</code>      <p>The <code>lang</code> attribute in <code>null</code>
607      namespace for HTML elements is defined as conforming only for      namespace for HTML elements is defined as conforming <em>only</em> for
608      HTML document.</p>      HTML document.</p>
609    
610      <p>To specify natural language information in XML document,      <p>To specify natural language information in XML document,
# Line 468  Web Document Conformance Checker (BETA)< Line 634  Web Document Conformance Checker (BETA)<
634  <d:item name="enumerated:invalid"  <d:item name="enumerated:invalid"
635      class="attribute-value-error">      class="attribute-value-error">
636    <d:message xml:lang="en">This attribute only allow a limited set of    <d:message xml:lang="en">This attribute only allow a limited set of
637    values and the specified value is not one of them.</d:message>    values and the specified value <code><var>{@}</var></code> is not one
638      of them.</d:message>
639  </d:item>  </d:item>
640    
641  <d:item name="duplicate ID"  <d:item name="duplicate ID"
# Line 478  Web Document Conformance Checker (BETA)< Line 645  Web Document Conformance Checker (BETA)<
645    <!-- @@ <id=a xml:id=a>? -->    <!-- @@ <id=a xml:id=a>? -->
646  </d:item>  </d:item>
647    
648    <d:item name="link type:bad context"
649        class="attribute-value-error">
650      <d:message xml:lang="en">The link type <code><var>$0</var></code>
651      cannot be specified for this element.</d:message>
652      <d:desc xml:lang="en">
653        <p>The specified link type cannot be used for the element.
654        The document is non-conforming.</p>
655    
656        <p>Link types are associated with limited set of elements.
657        They cannot be used with other elements.</p>
658    
659        <p>For example, link type <code>bookmark</code>
660        can be used with <code>a</code> or <code>area</code> element,
661        while it cannot be used with <code>link</code> element.</p>
662      </d:desc>
663    </d:item>
664    
665    <d:item name="link type:non-conforming"
666        class="attribute-value-error">
667      <d:message xml:lang="en">The link type <code><var>$0</var></code>
668      is non-conforming.</d:message>
669      <d:desc xml:lang="en">
670        <p>The specified link type is non-conforming, and therefore
671        the document is non-conforming.</p>
672    
673        <dl>
674        <dt>Link type <code>contents</code></dt>
675          <dd>Use link type <code>index</code>.</dd>
676        <dt>Link type <code>copyright</code></dt>
677          <dd>Use link type <code>license</code>.</dd>
678        <dt>Link type <code>home</code></dt>
679          <dd>Use link type <code>index</code>.</dd>
680        <dt>Link type <code>start</code></dt>
681          <dd>Use link type <code>first</code>.</dd>
682        <dt>Link type <code>toc</code></dt>
683          <dd>Use link type <code>index</code>.</dd>
684        </dl>
685      </d:desc>
686    </d:item>
687    
688  <d:item name="reserved browsing context name"  <d:item name="reserved browsing context name"
689      class="attribute-value-error">      class="attribute-value-error">
690    <d:message xml:lang="en">This browsing context name is reserved.</d:message>    <d:message xml:lang="en">Browsing context name
691    <d:item>    <code><var>{@}</var></code> is reserved.</d:message>
692      <d:desc xml:lang="en">
693      <p>The specified browsing context name is reserved.      <p>The specified browsing context name is reserved.
694      The document is non-conforming.</p>      The document is non-conforming.</p>
695    
# Line 494  Web Document Conformance Checker (BETA)< Line 702  Web Document Conformance Checker (BETA)<
702      browsing context names <code>_blank</code>,      browsing context names <code>_blank</code>,
703      <code>_main</code>, and <code>_replace</code>.      <code>_main</code>, and <code>_replace</code>.
704      However, they are <em>not</em> conforming attribute values.</p>      However, they are <em>not</em> conforming attribute values.</p>
705    </d:item>    </d:desc>
706    </d:item>
707    
708    </section>
709    
710    <section id="attribute-value-warnings">
711    <h2>Attribute Value Warnings</h2>
712    
713    <d:item name="link type:proposed" level="s"
714        class="attribute-value-warning should">
715      <d:message xml:lang="en">Link type <code><var>$0</var></code>
716      is proposed but not accepted yet; it <em>should not</em> be
717      used until it has been accepted.</d:message>
718      <d:desc>
719        <p>The link type is in the <i>proposed</i> status; it
720        <em>should not</em> be used until it has been
721        accepted.</p>
722    
723        <p><strong>Warning</strong>: The data served to the
724        conforming checker might be out of date; it might have already
725        been accepted or rejected, depending on which the document
726        might be conforming or non-conforming.  See WHATWG Wiki
727        for the latest information.</p>
728      </d:desc>
729  </d:item>  </d:item>
730    
731  </section>  </section>
# Line 515  Web Document Conformance Checker (BETA)< Line 746  Web Document Conformance Checker (BETA)<
746    <code>th</code>) in the last row.</d:message>    <code>th</code>) in the last row.</d:message>
747  </d:item>  </d:item>
748    
749    <d:item name="table:rowspan extends table"
750        class="table-model-error">
751      <d:message xml:lang="en">This <code>rowspan</code> attribute
752      results in creating a table row that does not contain
753      any cell anchored to it.</d:message>
754      <d:desc xml:lang="en">
755        <p>The <code>rowspan</code> attribute value of the cell
756        is so specified that it extends a table in the row axis.
757        However, the extended row does not contain any cell by itself.
758        The document is non-conforming.</p>
759    
760        <p>For example, the table below is non-conforming:
761          <pre class="html non-conforming example"><code>&lt;table>
762    &lt;tbody>
763    &lt;tr>&lt;td rowspan=2>&lt;/td>&lt;/tr>
764    &lt;/tbody>
765    &lt;/table></code></pre>
766        ... is non-conforming, since the second row contains only
767        a cell that spans the first and the second rows.</p>
768      </d:desc>
769    </d:item>
770    
771  </section>  </section>
772    
773  <section id="imt-warnings">  <section id="imt-warnings">
# Line 522  Web Document Conformance Checker (BETA)< Line 775  Web Document Conformance Checker (BETA)<
775    
776  <d:item name="IMT:obsolete subtype"  <d:item name="IMT:obsolete subtype"
777      class="should" level="s">      class="should" level="s">
778    <d:message xml:lang="en">An <em>obsolete</em> subtype is used.</d:message>    <d:message xml:lang="en"><code><var>{@}</var></code>: An <em>obsolete</em>
779      subtype is used.</d:message>
780  </d:item>  </d:item>
781    
782  <d:item name="IMT:private subtype"  <d:item name="IMT:private subtype"
783      class="should" level="s">      class="should" level="s">
784    <d:message xml:lang="en">A private (<code>x-</code> or <code>x.</code>)    <d:message xml:lang="en"><code><var>{@}</var></code>: A private
785    subtype is used.</d:message>    (<code>x-</code> or <code>x.</code>) subtype is used.</d:message>
786  </d:item>  </d:item>
787    
788  <d:item name="IMT:unregistered subtype"  <d:item name="IMT:unregistered subtype"
789      class="should" level="s">      class="should" level="s">
790    <d:message xml:lang="en">The subtype is not registered to IANA.</d:message>    <d:message xml:lang="en"><code><var>{@}</var></code>: The subtype is
791      not registered to IANA.</d:message>
792  <!-- TODO: Unknown message?? -->  <!-- TODO: Unknown message?? -->
793  </d:item>  </d:item>
794    
# Line 544  Web Document Conformance Checker (BETA)< Line 799  Web Document Conformance Checker (BETA)<
799    
800  <d:item name="URI::syntax error"  <d:item name="URI::syntax error"
801      class="must" level="m">      class="must" level="m">
802    <d:message xml:lang="en">This string is not an IRI syntactically.</d:message>    <d:message xml:lang="en">The specified value is syntactically not an IRI
803      reference.</d:message>
804      <d:desc xml:lang="en">
805        <p>The specified value does not satisfy the syntactical requirements
806        for IRI references.  The document is non-conforming.</p>
807    
808        <p>Possible causes:
809          <ul>
810          <li>The string might contain one or more white space characters.
811          Especially, the <code> </code> (<code>U+0020</code>
812          <code class="charname">SPACE</code>) character cannot be
813          used in IRI references.</li>
814          </ul>
815        </p>
816      </d:desc>
817  </d:item>  </d:item>
818    
819  </section>  </section>
# Line 574  Web Document Conformance Checker (BETA)< Line 843  Web Document Conformance Checker (BETA)<
843    <code>/</code>.</d:message>    <code>/</code>.</d:message>
844  </d:item>  </d:item>
845    
846    <d:item name="URI::lowercase hexadecimal digit"
847        class="should" level="s">
848      <d:message xml:lang="en">Hexadecimal digit in percent-encoding
849      should be in lowercase.</d:message>
850      <d:desc xml:lang="en">
851        <p>The hexadecimal digit in percent-encoding string in the IRI
852        is in lowercase.  Though the IRI <em>is</em> conforming,
853        it should be in uppercase.</p>
854      </d:desc>
855    </d:item>
856    
857    <d:item name="URI::percent-encoded unreserved"
858        class="should" level="s">
859      <d:message xml:lang="en">An unreserved character is
860      percent-encoded.</d:message>
861      <d:desc xml:lang="en">
862        <p>An unreserved character is percent-encoded in the IRI.
863        Though it <em>is</em> conforming, it should be in the
864        decoded (or bare) form.</p>
865      </d:desc>
866    </d:item>
867    
868    <d:item name="URI::uppercase scheme name"
869        class="should" level="s">
870      <d:message xml:lang="en">URI scheme name is in uppercase.</d:message>
871      <d:desc xml:lang="en">
872        <p>The scheme part of the IRI is written in uppercase letter.</p>
873    
874        <p>Uppercase scheme names are not required to be processed
875        correctly.</p>
876    <!-- @@
877     RFC 3986 3.1.
878     > Although schemes are case-
879       insensitive, the canonical form is lowercase and documents that
880       specify schemes must do so with lowercase letters.
881    
882     > An implementation ... should only produce lowercase scheme names for
883       consistency.
884    -->
885      </d:desc>
886    </d:item>
887    
888  </section>  </section>
889    
890  <section id="unsupported-messages">  <section id="unsupported-messages">
# Line 601  Web Document Conformance Checker (BETA)< Line 912  Web Document Conformance Checker (BETA)<
912    
913  <d:item name="link type"  <d:item name="link type"
914      class="unsupported" level="unsupported">      class="unsupported" level="unsupported">
915    <d:message xml:lang="en">The link type <code>$0</code> is not standardized    <d:message xml:lang="en">The link type <code><var>$0</var></code> is not
916    or registered at the time of the release of the conformance checker;    standardized or registered at the time of the release of the conformance
917    <em>it is non-conforming unless it has now been registered</em>.</d:message>    checker; <em>it is non-conforming unless it has now been
918      registered</em>.</d:message>
919    <d:desc xml:lang="en">    <d:desc xml:lang="en">
920      <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.
921      Some common link types are defined in the HTML5 specification.      Some common link types are defined in the HTML5 specification.
# Line 618  Web Document Conformance Checker (BETA)< Line 930  Web Document Conformance Checker (BETA)<
930    </d:desc>    </d:desc>
931  </d:item>  </d:item>
932    
933    <d:item name="event handler"
934        class="unsupported" level="unsupported">
935      <d:message xml:lang="en">Conformance checking for event handler attribute
936      is not supported; <em>it might or might not be conforming.</em></d:message>
937    </d:item>
938    
939    <d:item name="language tag"
940        class="unsupported" level="unsupported">
941      <d:message xml:lang="en">Conformance checking for language tag
942      is not supported; <em>it might or might not be conforming.</em></d:message>
943    </d:item>
944    
945    <d:item name="media query"
946        class="unsupported" level="unsupported">
947      <d:message xml:lang="en">Conformance checking for media query
948      is not supported; <em>it might or might not be conforming.</em></d:message>
949    </d:item>
950    
951    <d:item name="script"
952        class="unsupported" level="unsupported">
953      <d:message xml:lang="en">Conformance checking for script
954      language <code><var>$0</var></code> is not supported;
955      <em>it might or might not be conforming.</em></d:message>
956    </d:item>
957    
958    <d:item name="style"
959        class="unsupported" level="unsupported">
960      <d:message xml:lang="en">Conformance checking for style
961      language <code><var>$0</var></code> is not supported;
962      <em>it might or might not be conforming.</em></d:message>
963    </d:item>
964    
965  </section>  </section>
966    
967  <d:catalog>  <d:catalog>
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