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revision 1.11 by wakaba, Tue Nov 13 13:00:14 2007 UTC revision 1.19 by wakaba, Sat Dec 1 14:51:45 2007 UTC
# Line 17  Line 17 
17  <body class="has-abstract">  <body class="has-abstract">
18    
19  <div class="header">  <div class="header">
20  <h1>manakai's XML Conformance Checking</h1>  <h1>manakai's <abbr>XML</abbr> Conformance Checking</h1>
21  <h2>Working Draft <time datetime=2007-11-13>13 November 2007</time></h2>  <h2>Working Draft <time datetime=2007-12-01>1 December 2007</time></h2>
22    
23  <dl class="versions-uri">  <dl class="versions-uri">
24  <dt>This Version</dt>  <dt>This Version</dt>
# Line 120  In addition, the order in which <a href= Line 120  In addition, the order in which <a href=
120  raised is undefined.</p>  raised is undefined.</p>
121  </div>  </div>
122    
 <div class="section" id=checking-dom>  
 <h2>Checking <abbr>DOM</abbr></h2>  
   
 <p>The following algorithms and definitions are applied to  
 <abbr>XML</abbr> documents; especially, they are not applied  
 to <abbr>HTML</abbr> documents.<!-- TODO: ref to HTML5 --></p>  
123    
124  <div class=section id=error-categories>  <div class=section id=error-categories>
125  <h3>Error Classification</h3>  <h2>Error Classification</h2>
126    
127  <p class=ed>If a <code>Document</code> node has no  <p class=ed>If a <code>Document</code> node has no
128  xml-well-formedness-error, entity-error, and unknown-error,  xml-well-formedness-error, entity-error, and unknown-error,
# Line 141  into a well$B!>(Bformed XML document. Line 135  into a well$B!>(Bformed XML document.
135  can be easily serialized into a valid XML document.</p>  can be easily serialized into a valid XML document.</p>
136  </div>  </div>
137    
138    <p class=ed>To be a conforming <a href="http://www.w3.org/TR/2006/REC-xml-20060816/#dt-validating">validating XML processor</a>,
139    ...</p>
140    
141  <p>Errors are classified into these  <p>Errors are classified into these
142  <dfn id=error-category title="error category">error categories</dfn>:</p>  <dfn id=error-category title="error category">error categories</dfn>:</p>
143    
# Line 159  can be easily serialized into a valid XM Line 156  can be easily serialized into a valid XM
156    </dd>    </dd>
157  <dt><dfn id=round-trip-error><code>round-trip-error</code></dfn></dt>  <dt><dfn id=round-trip-error><code>round-trip-error</code></dfn></dt>
158    <dd class=ed>@@</dd>    <dd class=ed>@@</dd>
159    <dt><dfn id=round-trip-warning><code>round-trip-warning</code></dfn></dt>
160      <dd>
161        <p>A <a href="#round-trip-warning"><code>round-trip-warning</code></a>
162        will be raised when a construct, which might not be restored to the same
163        construct when it is serialized and then re-parsed by a conforming
164        processor, is encountered.</p>
165        <div class="example memo">
166          <p>For a <code>Comment</code> node a
167          <a href="#round-trip-warning"><code>round-trip-warning</code></a> will
168          be raised, since <abbr>XML</abbr> processors are not required to
169          report texts of comments for applications.</p>
170        </div>
171      </dd>
172  <dt class=ed><dfn id=unknown-error><code>unknown-error</code></dfn>?</dt>  <dt class=ed><dfn id=unknown-error><code>unknown-error</code></dfn>?</dt>
173    <dd class=ed>@@</dd>    <dd class=ed>@@</dd>
174  <dt><dfn id=xml-misc-error><code>xml-misc-error</code></dt>  <dt><dfn id=xml-misc-error><code>xml-misc-error</code></dt>
# Line 179  can be easily serialized into a valid XM Line 189  can be easily serialized into a valid XM
189    <a href="@@/#dt-fatal">fatal error</a>)    <a href="@@/#dt-fatal">fatal error</a>)
190    that is not classified to any other <a href="#error-category">error    that is not classified to any other <a href="#error-category">error
191    category</a>. <span class=ed>@@ What errors fall into this category?</span></dd>    category</a>. <span class=ed>@@ What errors fall into this category?</span></dd>
192    <dt><dfn id=xml-misc-recommendation><code>xml-misc-recommendation</code></dfn></dt>
193      <dd>
194        <p>An
195        <a href="#xml-misc-recommendation"><code>xml-misc-recommendation</code></a>
196        will be raised if a <em class=rfc2119>SHOULD</em>$B!>(Blevel requirement
197        in <abbr>XML</abbr> specification is not met.</p>
198      </dd>
199  <dt><dfn id=xml-validity-error><code>xml-validity-error</code></dfn></dt>  <dt><dfn id=xml-validity-error><code>xml-validity-error</code></dfn></dt>
200    <dd>A violation of validity constraint in XML document.</dd>    <dd>A violation of validity constraint in XML document.</dd>
201  <dt><dfn id=xml-well-formedness-error><code>xml-well-formedness-error</code></dfn></dt>  <dt><dfn id=xml-well-formedness-error><code>xml-well-formedness-error</code></dfn></dt>
# Line 196  can be easily serialized into a valid XM Line 213  can be easily serialized into a valid XM
213    
214  </div>  </div>
215    
216    <div class=section id=parsing-xml>
217    <h2>Parsing <abbr>XML</abbr> Document</h2>
218    
219    <ul>
220    <li>If the <abbr>XML</abbr> document does not begin with an
221    <abbr>XML</abbr> declaration, then raise an
222    <a href="#xml-misc-recommentation" id=xmr-xml-decl><code>xml-misc-recommendation</code></a>.</li>
223    <li>If the replacement text of an entity declaration is
224    <code>&lt;</code>, then raise an
225    <a href="#xml-misc-warning" id=xmw-entity-value-lt><code>xml-misc-warning</code></a>.<!--
226    "strongly advised to avoid" in a Note in Section 2.3 of [XML10], [XML11].
227    --></li>
228    <li>If there is an element type declaration whose <code>Name</code>
229    value is already declared, then raise an
230    <a href="#xml-validity-error" id=vc-edunique><code>xml-validity-error</code></a>.</li>
231    <li>If attribute definition whose <code>Name</code> is
232    <code>xml:space</code> has <span class=ed>declared type different from
233    (default|preserve), (default), or (preserve)</span>, then raise an
234    <a href="#xml-misc-error" id=xme-ad-xml-space><code>xml-misc-error</code></a>.
235    <span class=ed>@@ duplication with
236    <a href="#xml-at-xml-space">#xml-at-xml-space</a>.<!--
237    <!ATTLIST e xml:space CDATA #IMPLIED xml:space CDATA #IMPLIED> --></span></li>
238    <li>If an empty-element tag is used for an element which is <em>not</em>
239    declared <code>EMPTY</code>, then raise an
240    <a href="#xml-misc-recommentation" id=xmr-emptyelemtag-not-empty><code>xml-misc-recommendation</code></a>.</li>
241    <li>If an empty-element tag is <em>not</em> used for an element which is
242    declared <code>EMPTY</code>, then raise an
243    <a href="#xml-misc-recommentation" id=xmr-empty-not-emptyelemtag><code>xml-misc-recommendation</code></a>.</li>
244    <!--
245    
246    #vc-PEinMarkupDecl Validity constraint: Proper Declaration/PE Nesting
247    #wfc-PEinInternalSubset Well-formedness constraint: PEs in Internal Subset
248    #ExtSubset Well-formedness constraint: External Subset
249    #PE-between-Decls Well-formedness constraint: PE Between Declarations
250    #GIMatch Well-formedness constraint: Element Type Match
251    #uniqattspec Well-formedness constraint: Unique Att Spec
252    #NoExternalRefs Well-formedness constraint: No External Entity References
253    #CleanAttrVals Well-formedness constraint: No < in Attribute Values
254    #vc-PEinGroup Validity constraint: Proper Group/PE Nesting
255    "For interoperability, if a parameter-entity reference appears in a choice, seq, or Mixed construct, its replacement text SHOULD contain at least one non-blank character, and neither the first nor last non-blank character of the replacement text SHOULD be a connector (| or ,)."
256    "For interoperability, an XML processor MAY at user option issue a warning when more than one attribute-list declaration is provided for a given element type, or more than one attribute definition is provided for a given attribute, but this is not an error."
257    #condsec-nesting Validity constraint: Proper Conditional Section/PE Nesting
258    #wf-Legalchar Well-formedness constraint: Legal Character
259    #textent Well-formedness constraint: Parsed Entity
260    #norecursion Well-formedness constraint: No Recursion
261    #indtd Well-formedness constraint: In DTD
262    "External parsed entities SHOULD each begin with a text declaration."
263    "It is an error for a reference to an unparsed entity to appear in the EntityValue in an entity declaration."
264    #UniqueNotationName Validity constraint: Unique Notation Name
265    
266    @@ Need detailed review, but maybe should be in parsing phase
267    
268    #vc-check-rmd Validity constraint: Standalone Document Declaration
269    
270    @@ Need dtailed review
271    
272    #wf-entdeclared Well-formedness constraint: Entity Declared
273    #vc-entdeclared Validity constraint: Entity Declared
274    "For interoperability, valid documents SHOULD declare the entities amp, lt, gt, apos, quot, in the form specified in 4.6 Predefined Entities."
275    "If the entities lt or amp are declared, they MUST be declared as internal entities whose replacement text is a character reference to the respective character (less-than sign or ampersand) being escaped; the double escaping is REQUIRED for these entities so that references to them produce a well-formed result. If the entities gt, apos, or quot are declared, they MUST be declared as internal entities whose replacement text is the single character being escaped (or a character reference to that character; the double escaping here is OPTIONAL but harmless)."
276    
277    @@ flaged and then reported in DOM check phase
278    
279    "Entities encoded in UTF-16 MUST and entities encoded in UTF-8 MAY begin with the Byte Order Mark"
280    "In the absence of external character encoding information (such as MIME headers), parsed entities which are stored in an encoding other than UTF-8 or UTF-16 MUST begin with a text declaration"
281    "In an encoding declaration, the values "UTF-8", "UTF-16", "ISO-10646-UCS-2", and "ISO-10646-UCS-4" SHOULD be used for the various encodings and transformations of Unicode / ISO/IEC 10646, the values "ISO-8859-1", "ISO-8859-2", ... "ISO-8859-n" (where n is the part number) SHOULD be used for the parts of ISO 8859, and the values "ISO-2022-JP", "Shift_JIS", and "EUC-JP" SHOULD be used for the various encoded forms of JIS X-0208-1997. It is RECOMMENDED that character encodings registered (as charsets) with the Internet Assigned Numbers Authority [IANA-CHARSETS], other than those just listed, be referred to using their registered names; other encodings SHOULD use names starting with an "x-" prefix."
282    
283    @@ in parsing phase
284    
285    "It is a fatal error when an XML processor encounters an entity with an encoding that it is unable to process. It is a fatal error if an XML entity is determined (via default, encoding declaration, or higher-level protocol) to be in a certain encoding but contains byte sequences that are not legal in that encoding."
286    
287    -->
288    </ul>
289    </div>
290    
291    <div class="section" id=checking-dom>
292    <h2>Checking <abbr>DOM</abbr></h2>
293    
294    <p>The following algorithms and definitions are applied to
295    <abbr>XML</abbr> documents; especially, they are not applied
296    to <abbr>HTML</abbr> documents.<!-- TODO: ref to HTML5 --></p>
297    
298  <div class=section id=definitions>  <div class=section id=definitions>
299  <h3>Definitions</h3>  <h3>Definitions</h3>
300    
# Line 215  is that of the <code>Document</code> nod Line 314  is that of the <code>Document</code> nod
314    
315    
316  <div class=section id=checking-components>  <div class=section id=checking-components>
317  <h3>Checking Components</h3>  <h3>Conformance Checking Algorithms for Components</h3>
318    
319  <p>The algorithm  <p>To
320  <dfn id=algorithm-to-validate-an-xml-character-data title-"to validate an XML character data">to  <dfn id=algorithm-to-validate-an-xml-character-data title="validate an XML string">to
321  validate an <abbr>XML</abbr> character data  validate an <abbr>XML</abbr> string (<dfn id=var-s><var>s</var></dfn>)</dfn>,
322  (<dfn id=var-s><var>s</var></dfn>)</dfn> is defined as following:</p>  the following algorithm <em class=rfc2119>MUST</em> be used:</p>
323  <ol>  <ol>
324  <li>If <var>s</var> contains a character that is <em>not</em> in  <li>If <var>s</var> contains a character that is <em>not</em> in
325  the character class <a href="#class-Char10"><code>Char10</code></a>,  the character class <a href="#class-Char10"><code>Char10</code></a>,
# Line 235  class <a href="#class-ControlChar10"><co Line 334  class <a href="#class-ControlChar10"><co
334  then raise an  then raise an
335  <a href="#xml-misc-warning" id=xmw-control-char><code>xml-misc-warning</code></a>.</li>  <a href="#xml-misc-warning" id=xmw-control-char><code>xml-misc-warning</code></a>.</li>
336  <li class=ed>@@ XML 1.1 support</li>  <li class=ed>@@ XML 1.1 support</li>
337  <li class=ed>@@ If U+000D, round-trip-error</li>  <li>If <var>s</var> contains a <code class=char>U+000D</code>
338    <code class=charname>CARRIAGE RETURN</code> character, then
339    raise a
340    <a href="#round-trip-error" id=rte-cr><code>round-trip-error</code></a>.
341    <span class=ed>@@ We should not raise duplicate errors for U+000D
342    in attribute values.  In addition, we should support a mode where
343    U+000D will be serialized as &#x000D; (so that no round-trip-error
344    will be raised).</span></li>
345  </ol>  </ol>
346    
347  <p>The algorithm  <p>To
348  <dfn id=algorithm-to-validate-a-name title="to validate a Name">to validate a  <dfn id=algorithm-to-validate-a-name title="validate a Name">validate a
349  <code>Name</code> (<dfn id=var-name><var>name</var></dfn>)</dfn> is defined  <code>Name</code> (<dfn id=var-name-s><var>s</var></dfn>)</dfn>, the following
350  as following:</p>  algorithm <em class=rfc2119>MUST</em> be used:</p>
351  <ol>  <ol>
352  <li class=ed>@@</li>  <li>If <var>s</var> is an empty string, then raise an
353    <a href="#xml-well-formedness-error" id=wfe-name-empty><code>xml-well-formedness-error</code></a>.
354    Abort these steps.</li>
355    <li><a href="#algorithm-to-validate-an-xml-character-data" title="validate an XML string">Validate
356    <var>s</var> as an <abbr>XML</abbr> string</a>.</li>
357    <li>If the first character in <var>s</var> is a character that is
358    <em>not</em> in the character class
359    <a href="#class-NameStartChar10"><code>NameStartChar10</code></a>, then raise
360    an
361    <a href="#xml-well-formedness-error" id=wfe-name-startchar><code>xml-well-formedness-error</code></a>.</li>
362    <li>If a character other than the first character in <var>s</var> is a
363    character that is <em>not</em> in the character class
364    <a href="#class-NameChar10"><code>NameChar10</code></a>, then raise an
365    <a href="#xml-well-formedness-error" id=wfe-name-char><code>xml-well-formedness-error</code></a>.</li>
366    <li>If <var>s</var> begins with the string <code>xml</code> (in any
367    case combination), then raise an
368    <a href="#xml-misc-warning" id=xmw-reserved-name><code>xml-misc-warning</code></a>.
369    <span class=ed>@@ except for attribute names <code>xml:lang</code>,
370    <code>xml:space</code>, <code>xml:base</code>, <code>xml:id</code>,
371    <code>xmlns</code>, <code>xmlns:<var>*</var></code>,
372    pi name <code>xml-stylesheet</code>.</span><!--
373    "names beginning with a match to (('X'|'x')('M'|'m')('L'|'l')) are reserved for standardization in this or future versions of this specification.":
374    xmlns, xml-stylesheet, xml:base and xml:id specifications violate to this sentense!
375    --></li>
376    <!-- COLON in Name is a lowercase "should not" in a Note of [XML10],
377    [XML11]. -->
378    <li class=ed>@@ XML 1.1 support</li>
379  </ol>  </ol>
380    
381  <p>The algorithm  <p>To
382  <dfn id=algorithm-to-validate-a-ncname title="to validate an NCName">to  <dfn id=algorithm-to-validate-an-ncname title="validate an NCName">validate
383  validate an <code>NCName</code> (<dfn id=var-name><var>name</var></dfn>)</dfn>  an <code>NCName</code> (<dfn id=var-ncname-s><var>s</var></dfn>)</dfn>, the
384  is defined as following:</p>  following algorithm <em class=rfc2119>MUST</em> be used:</p>
385  <ol>  <ol>
386    <li><a href="#algorithm-to-validate-a-name" title="validate a Name">Validate
387    <var>s</var> as a <code>Name</code></a>.</li>
388  <li class=ed>@@</li>  <li class=ed>@@</li>
389  </ol>  </ol>
390    
391  <p>To <dfn id=algorithm-to-validate-a-public-identifier title="validate a public identifier">validate  <p>To
392    <dfn id=algorithm-to-validate-a-public-identifier title="validate a public identifier">validate
393  a public identifier (<dfn id=var-pid><var>pid</var></dfn>)</dfn>, the  a public identifier (<dfn id=var-pid><var>pid</var></dfn>)</dfn>, the
394  algorithm below <em class=rfc2119>MUST</em> be used:</p>  following algorithm <em class=rfc2119>MUST</em> be used:</p>
395  <ol>  <ol>
396      <li>If <var>pid</var> is <code>null</code>, abort these steps.</li>
397    <li>If <var>pid</var> contains any character    <li>If <var>pid</var> contains any character
398    that is outside of the range of <code>#x20 | #xD | #xA |    that is outside of the range of <code>#x20 | #xD | #xA |
399    [a-zA-Z0-9] | [-'()+,./:=?;!*#@$_%]</code><!-- @@ TODO: formal def -->,    [a-zA-Z0-9] | [-'()+,./:=?;!*#@$_%]</code><!-- @@ TODO: formal def -->,
# Line 274  algorithm below <em class=rfc2119>MUST</ Line 410  algorithm below <em class=rfc2119>MUST</
410    <code class=char>U+0020</code> <code class=charname>SPACE</code> character    <code class=char>U+0020</code> <code class=charname>SPACE</code> character
411    immediately followed by another <code class=char>U+0020</code>    immediately followed by another <code class=char>U+0020</code>
412    <code class=charname>SPACE</code> character in <var>pid</var>, then it is a    <code class=charname>SPACE</code> character in <var>pid</var>, then it is a
413    <a href="#round-trip-error" id=rte-pubid-space><code>round-trip-error</code></a>.</li>    <a href="#round-trip-error" id=rte-pubid-space><code>round-trip-error</code></a>.
414      <span class=ed>Is this really a roundtripness problem?  XML spec
415      does only define the way to match public identifiers in fact, no
416      canonical form.</span></li>
417    <li class=ed>@@ Should we check formal-public-identifierness?</li>    <li class=ed>@@ Should we check formal-public-identifierness?</li>
418  </ol>  </ol>
419    
420    <p>To
421    <dfn id=algorithm-to-validate-a-system-identifier title="validate a system identifier">validate
422    a system identifier (<dfn id=var-sid><var>sid</var></dfn>)</dfn>, the
423    following algorithm <em class=rfc2119>MUST</em> be used:</p>
424    <ol>
425      <li>If <var>sid</var> is <code>null</code>, abort these steps.</li>
426    <li><a href="#algorithm-to-validate-an-xml-character-data" title="validate an XML string">Validate
427    <var>sid</var> as an <abbr>XML</abbr> string</a>.</li>
428      <li>If <var>sid</var> contains both <code class=char>U+0022</code>
429      <code class=charname>QUOTATION MARK</code> (<code class=char>"</code>) and
430      <code class=char>U+0027</code> <code class=charname>APOSTROPHE</code>
431      (<code class=char>'</code>) characters, raise an
432      <a href="#xml-well-formedness-error" id=wfe-sid-lit><code>xml-well-formedness-error</code></a>.</li>
433      <li>If <var>sid</var> contains at least one <code class=char>U+0023</code>
434      <code class=charname>NUMBER SIGN</code> (<code class=char>#</code>)
435      character, then raise an
436      <a href="#xml-misc-error" id=xme-sid-fragment><code>xml-misc-error</code></a>.</li>
437      <li class=ed>@@ If <var>sid</var> cannot be converted to a URI
438      reference, then raise a fact-level error (xml-misc-warning?).<!--
439      XML 1.0 has no conformance language for system identifier being
440      a URI reference. --></li>
441    </ol>
442    
443  </div>  </div>
444    
445  <div class=section id=checking-node>  <div class=section id=checking-node>
# Line 290  following:</p> Line 452  following:</p>
452  <dt>If <var>n</var> is an <code>Attr</code> node</dt>  <dt>If <var>n</var> is an <code>Attr</code> node</dt>
453    <dd>    <dd>
454      <ol>      <ol>
455      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li><a href="#algorithm-to-validate-an-ncname">Validate the
456      <code>localName</code> attribute value as an <code>NCName</code></a>.</li>      <code>localName</code> attribute value as an <code>NCName</code></a>.</li>
457      <li>If the <code>prefix</code> attribute value is different from      <li>If the <code>prefix</code> attribute value is different from
458      <code>null</code>, then <a href="#algorithm-to-validate-a-ncname">validate      <code>null</code>, then <a href="#algorithm-to-validate-an-ncname">validate
459      the <code>prefix</code> attribute value as an <code>NCName</code></a>.</li>      the <code>prefix</code> attribute value as an <code>NCName</code></a>.</li>
460      <li>For each node <dfn id=var-attr-nc><var>n<sub><var>c</var></sub></var></dfn> in the      <li>For each node <dfn id=var-attr-nc><var>n<sub><var>c</var></sub></var></dfn> in the
461      <code>childNodes</code> list of <var>n</var>,      <code>childNodes</code> list of <var>n</var>,
# Line 308  following:</p> Line 470  following:</p>
470        <a href="#algorithm-to-check-a-node" title="check a node">check        <a href="#algorithm-to-check-a-node" title="check a node">check
471        <var>n<sub><var>c</var></sub></var></a> recusrively.</li>        <var>n<sub><var>c</var></sub></var></a> recusrively.</li>
472        </ol></li>        </ol></li>
473        <li>If <code>nodeName</code> attribute of <var>n</var> is
474        <code>xml:space</code> <span class=ed>@@ or {xml namespace}:space ?</span>
475        and <code>value</code> attribute of <var>n</var> is neither
476        <code>default</code> nor <code>preserve</code>, then it is an
477        <a href="#xml-misc-error" id=xme-attr-xml-space><code>xml-misc-error</code></a>.<!--
478        Note that <!ATTLIST e xml:space (default|preserve) "a">...
479        <e xml:space="default"/> is conforming and valid. --></li>
480        <li class=ed>@@ xml:lang value is not a language tag [RFC 3066 or its
481        successor] or an empty string, then xml-misc-warning
482        (a "fact"-level error; not an XML error).</li>
483      <li class=ed>@@ <code>specified</code>,      <li class=ed>@@ <code>specified</code>,
484      <code>manakaiAttributeType</code></li>      <code>manakaiAttributeType</code> (#ValueType Validity constraint: Attribute Value Type)</li>
485        <!-- xml:space MUST be declared to be valid. -->
486        <li>Let <dfn id=var-v><var>v</var></dfn> be the value of the
487        attribute <code>value</code> of <var>n</var>.</li>
488        <li>Validate the <var>n</var> against the <span class=ed>declared
489        type</span> as following:
490          <dl class=switch>
491          <dt class=ed><code>ID_ATTR</code></dt>
492            <dd>
493              <ol>
494              <li><span class=ed>Validate <var>v</var> as an
495              <code>Name</code>.</span>  If it fails, then raise an
496              <a href="#xml-validity-error" id=vc-id-name><code>xml-validity-error</code></a>.</li>
497              <li><span class=ed>If <code>ID</code> <var>v</var> is defined,</span>
498              then raise an  
499              <a href="#xml-validity-error" id=vc-id-duplication><code>xml-validity-error</code></a>.</li>
500              </ol>
501            </dd>
502          <dt class=ed>IDREF_ATTR</dt>
503            <dd>
504              <ol>
505              <li><span class=ed>Validate <var>v</var> as an
506              <code>Name</code>.</span>  If it fails, then raise an
507              <a href="#xml-validity-error" id=vc-idref-name><code>xml-validity-error</code></a>.</li>
508              <li><span class=ed>If <code>ID</code> <var>v</var> is NOT
509              defined,</span> then raise an  
510              <a href="#xml-validity-error" id=vc-idref-match><code>xml-validity-error</code></a>.</li>
511              </ol>
512            </dd>
513          <dt class=ed>IDREFS_ATTR</dt>
514            <dd class=ed>@@</dd>
515          <dt class=ed>ENTITY_ATTR</dt>
516            <dd>
517              <ol>
518              <li><span class=ed>Validate <var>v</var> as an
519              <code>Name</code>.</span>  If it fails, then raise an
520              <a href="#xml-validity-error" id=vc-entname-name><code>xml-validity-error</code></a>.</li>
521              <li><span class=ed>If <code>Entity</code> <var>v</var> is NOT
522              defined,</span> then raise an  
523              <a href="#xml-validity-error" id=vc-entname-match><code>xml-validity-error</code></a>.</li>
524              </ol>
525            </dd>
526          <dt class=ed>ENTITIES_ATTR</dt>
527            <dd class=ed>@@</dd>
528          <dt class=ed>NMTOKEN_ATTR</dt>
529            <dd>
530              <ol>
531              <li><span class=ed>Validate <var>v</var> as an
532              <code>Nmtoken</code>.</span>  If it fails, then raise an
533              <a href="#xml-validity-error" id=vc-nmtok-name><code>xml-validity-error</code></a>.</li>
534              </ol>
535            </dd>
536          <dt class=ed>NMTOKENS_ATTR</dt>
537            <dd class=ed>@@</dd>
538          <dt class=ed>NOTATION_ATTR</dt>
539            <dd class=ed><var>v</var> must be one of enumerated values.
540            If not, then raise an
541            <a href="#xml-validity-error" id=vc-notatn-match><code>xml-validity-error</code></a>.</dd>
542          <dt class=ed>ENUMERATED_ATTR</dt>
543            <dd class=ed><var>v</var> must be one of enumerated values.
544            If not, then raise an
545            <a href="#xml-validity-error" id=vc-enum><code>xml-validity-error</code></a>.</dd>
546          <dt class=ed>@@</dt>
547          </dl>
548        </li>
549        <li>If <span class=ed>type ID and default is NOT #IMPLIED or #REQUIRED</span>, then
550        raise an
551        <a href="#xml-validity-error" id=vc-id-default><code>xml-validity-error</code></a>.</li>
552        <li class=ed>@@ #FixedAttr Validity constraint: Fixed Attribute Default</li>
553        <li class=ed>@@ strict serialization error for U+000D, U+000A, and
554        U+0009 characters, leading/trailing U+0020, and U+0020{2,} string?</li>
555      </ol>      </ol>
556    </dd>    </dd>
557  <dt>If <var>n</var> is an <code>AttributeDefinition</code> node</dt>  <dt>If <var>n</var> is an <code>AttributeDefinition</code> node</dt>
558    <dd>    <dd>
559      <ol>      <ol>
560      <li class=ed></li>      <li class=ed></li>
561        <li>If <code>nodeName</code> attribute of <var>n</var> is
562        <code>xml:space</code> <span class=ed>@@ or {xml namespace}:space ?</span>
563        and <span class=ed>its declared type is different from (default|preserve),
564        (default), or (preserve)</span>, then raise an
565        <a href="#xml-misc-error" id=xme-at-xml-space><code>xml-misc-error</code></a>.</li>
566      <li>For each node <dfn id=var-ad-nc><var>n<sub><var>c</var></sub></var></dfn> in the      <li>For each node <dfn id=var-ad-nc><var>n<sub><var>c</var></sub></var></dfn> in the
567      <code>childNodes</code> list of <var>n</var>,      <code>childNodes</code> list of <var>n</var>,
568        <ol>        <ol>
# Line 329  following:</p> Line 576  following:</p>
576        <a href="#algorithm-to-check-a-node" title="check a node">check        <a href="#algorithm-to-check-a-node" title="check a node">check
577        <var>n<sub><var>c</var></sub></var></a> recusrively.</li>        <var>n<sub><var>c</var></sub></var></a> recusrively.</li>
578        </ol></li>        </ol></li>
579        <li class=ed>If <code>NOTATION_ATTR</code>, enumerated values MUST
580        be declared.  If not, then raise an
581        <a href="#xml-validity-error" id=vc-notatn-declared><code>xml-validity-error</code></a>.</li>
582        <li class=ed>If <code>NOTATION_ATTR</code> or <code>ENUMERATED_ATTR</code>,
583        values MUST all be distinct.  If not, then raise an
584        <a href="#xml-validity-error" id=vc-no-duplicate-tokens><code>xml-validity-error</code></a>.</li>
585        <li class=ed>If <code>NOTATION_ATTR</code> on an <code>EMPTY</code>
586        element, then raise an
587        <a href="#xml-validity-error" id=vc-no-notation-empty><code>xml-validity-error</code></a>.</li>
588        <li class=ed>@@ #defattrvalid Validity constraint: Attribute Default Value Syntactically Correct</li>
589      </ol>      </ol>
590    </dd>    </dd>
591  <dt>If <var>n</var> is a <code>CDATASection</code> node</dt>  <dt>If <var>n</var> is a <code>CDATASection</code> node</dt>
592    <dd>    <dd>
593      <ol>      <ol>
594      <li><a href="#algorithm-to-validate-an-xml-character-data">Validate the      <li><a href="#algorithm-to-validate-an-xml-character-data" title="validate an XML string">Validate the
595      <code>data</code> attribute value as an <abbr>XML</abbr> character      <code>data</code> attribute value as an <abbr>XML</abbr> character
596      data</a>.</li>      data</a>.</li>
597      <li>If the <code>data</code> attribute value contains      <li>If the <code>data</code> attribute value contains
598      a string <code>]]></code>, then it is an      a string <code>]]></code>, then raise an
599      <a href="#xml-well-formedness-error" id=wfe-cs-mse><code>xml-well-formedness-error</code></a>.</li>      <a href="#xml-well-formedness-error" id=wfe-cs-mse><code>xml-well-formedness-error</code></a>.<!-- "for compatibility" --></li>
600      <li>If the <code>childNodes</code> list of <var>n</var> contains      <li>If the <code>childNodes</code> list of <var>n</var> contains
601      any nodes, they are in      any nodes, they are in
602      <a href="#xml-well-formedness-error" id=wfe-cs-child><code>xml-well-formedness-error</code></a>.</li>      <a href="#xml-well-formedness-error" id=wfe-cs-child><code>xml-well-formedness-error</code></a>.</li>
# Line 348  following:</p> Line 605  following:</p>
605  <dt>If <var>n</var> is a <code>Comment</code> node</dt>  <dt>If <var>n</var> is a <code>Comment</code> node</dt>
606    <dd>    <dd>
607      <ol>      <ol>
608      <li><a href="#algorithm-to-validate-an-xml-character-data">Validate the      <li>Raise an
609        <a href="#round-trip-warning" id=rtw-comment><code>round-trip-warning</code></a>.</li>
610        <li><a href="#algorithm-to-validate-an-xml-character-data" title="validate an XML string">Validate the
611      <code>data</code> attribute value as an <abbr>XML</abbr> character      <code>data</code> attribute value as an <abbr>XML</abbr> character
612      data</a>.</li>      data</a>.</li>
613      <li>If the <code>data</code> attribute value contains      <li>If the <code>data</code> attribute value contains
614      a string <code>--</code>, or if it ends with a character      a string <code>--</code>, or if it ends with a character
615      <code>-</code>, then it is an      <code>-</code>, then raise an
616      <a href="#xml-well-formedness-error" id=wfe-comment-com><code>xml-well-formedness-error</code></a>.</li>      <a href="#xml-well-formedness-error" id=wfe-comment-com><code>xml-well-formedness-error</code></a>.<!--
617        "for compatibility" --></li>
618      <li>If the <code>childNodes</code> list of <var>n</var> contains      <li>If the <code>childNodes</code> list of <var>n</var> contains
619      any nodes, they are in      any nodes, they are in
620      <a href="#xml-well-formedness-error" id=wfe-comment-child><code>xml-well-formedness-error</code></a>.</li>      <a href="#xml-well-formedness-error" id=wfe-comment-child><code>xml-well-formedness-error</code></a>.</li>
# Line 414  following:</p> Line 674  following:</p>
674  <dt>If <var>n</var> is a <code>DocumentType</code> node</dt>  <dt>If <var>n</var> is a <code>DocumentType</code> node</dt>
675    <dd>    <dd>
676      <ol>      <ol>
677      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li><a href="#algorithm-to-validate-an-ncname">Validate the
678      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>
679        <li>Follow the following substeps:
680          <ol>
681          <li>If <code>ownerDocument</code> attribute of <var>n</var> is
682          <code>null</code>, then abort these substeps.</li>
683          <li>If <code>documentElement</code> attribute of the node
684          set to <code>ownerDocument</code> attribute of <var>n</var> is
685          <code>null</code>, then abort these substeps.</li>
686          <li>If <code>nodeName</code> attribute of the node set to
687          <code>documentElement</code> attribute of the node set to
688          <code>ownerDocument</code> attribute of <var>n</var> is
689          different from <code>nodeName</code> of <var>n</var>,
690          then raise an
691          <a href="#xml-validity-error" id=vc-roottype><code>xml-validity-error</code></a>.</li></li>
692          </ol>
693        </li>
694      <li><a href="#algorithm-to-validate-a-public-identifier" title="validate a public identifier">Validate      <li><a href="#algorithm-to-validate-a-public-identifier" title="validate a public identifier">Validate
695      the <code>publicId</code> attribute value as a public identifier</a>.</li>      the <code>publicId</code> attribute value as a public identifier</a>.</li>
696      <li>If the <code>systemId</code> attribute value contains      <li><a href="#algorithm-to-validate-a-system-identifier" title="validate a system identifier">Validate
697      both <code>"</code> and <code>'</code> characters, it is a      the <code>systemId</code> attribute value as a system identifier</a>.</li>
698      <a href="#xml-well-formedness-error" id=wfe-dt-system-id><code>xml-well-formedness-error</code></a>.</li>      <li>If the <code>publicId</code> attribute value of <var>n</var> is
699      <!-- publicId = non-null and systemId = null -->      <em>not</em> <code>null</code> and the <code>systemId</code> attribute
700        value of <var>n</var> is <code>null</code>, then raise an
701        <a href="#xml-well-formedness-error" id=wfe-dt-sid><code>xml-well-formedness-error</code></a>.
702        <span class=ed>@@ publicId == null?  Or, publicId == ""</span></li>
703      <li>For each node <dfn id=var-dt-nc><var>n<sub><var>c</var></sub></var></dfn>      <li>For each node <dfn id=var-dt-nc><var>n<sub><var>c</var></sub></var></dfn>
704      in the <code>childNodes</code> list of <var>n</var>,      in the <code>childNodes</code> list of <var>n</var>,
705        <ol>        <ol>
# Line 433  following:</p> Line 711  following:</p>
711        <a href="#algorithm-to-check-a-node" title="check a node">check        <a href="#algorithm-to-check-a-node" title="check a node">check
712        <var>n<sub><var>c</var></sub></var></a> recusrively.</li>        <var>n<sub><var>c</var></sub></var></a> recusrively.</li>
713        </ol></li>        </ol></li>
714      <li class=ed>@@ <code>entities</code>, <code>notations</code>,      <li>For each node in the <code>entities</code>, <code>notations</code>,
715      <code>elementTypes</code>, externally declared?</li>      and <code>elementTypes</code> lists of <var>n</var>,
716        <a href="#algorithm-to-check-a-node" title="check a node">check the
717        node</a> recursively.</li>
718        <li class=ed>@@ externally declared?</li>
719      </ol>      </ol>
720    </dd>    </dd>
721  <dt>If <var>n</var> is an <code>Element</code> node</dt>  <dt>If <var>n</var> is an <code>Element</code> node</dt>
722    <dd>    <dd>
723      <ol>      <ol>
724      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li><a href="#algorithm-to-validate-an-ncname">Validate the
725      <code>localName</code> attribute value as an <code>NCName</code></a>.</li>      <code>localName</code> attribute value as an <code>NCName</code></a>.</li>
726      <li>If the <code>prefix</code> attribute value is different from      <li>If the <code>prefix</code> attribute value is different from
727      <code>null</code>, then <a href="#algorithm-to-validate-a-ncname">validate      <code>null</code>, then <a href="#algorithm-to-validate-an-ncname">validate
728      the <code>prefix</code> attribute value as an <code>NCName</code></a>.</li>      the <code>prefix</code> attribute value as an <code>NCName</code></a>.</li>
729      <li>For each node <dfn id=var-element-nc><var>n<sub><var>c</var></sub></var></dfn>      <li>For each node <dfn id=var-element-nc><var>n<sub><var>c</var></sub></var></dfn>
730      in the <code>childNodes</code> list of <var>n</var>,      in the <code>childNodes</code> list of <var>n</var>,
# Line 461  following:</p> Line 742  following:</p>
742        <a href="#algorithm-to-check-a-node" title="check a node">check        <a href="#algorithm-to-check-a-node" title="check a node">check
743        <var>n<sub><var>c</var></sub></var></a> recursively.</li>        <var>n<sub><var>c</var></sub></var></a> recursively.</li>
744        </ol></li>        </ol></li>
745        <li class=ed>@@ #elementvalid Validity constraint: Element Valid</li>
746        <li>Let <var>attrs</var> be the value of the <code>attribute</code>
747        attribute of <var>n</var>.  Check conformance of <var>attrs</var>
748        as following:
749          <ol>
750          <li>If <var>attrs</var> contains an <code>Attr</code> node whose
751          <code>nodeName</code> attribute value is equal to that of another
752          <code>Attr</code> node in <var>attrs</var>, then raise an
753          <a href="#xml-well-formedness-error" id=wfe-uniqattspec><code>xml-well-formedness-error</code></a>.<!--
754          #uniqattspec Well-formedness constraint: Unique Att Spec --></li>
755          <li class=ed>@@ #RequiredAttr Validity constraint: Required Attribute</li>
756          </ol>
757        </li>
758      </ol>      </ol>
759    </dd>    </dd>
760  <dt>If <var>n</var> is an <code>ElementTypeDefinition</code> node</dt>  <dt>If <var>n</var> is an <code>ElementTypeDefinition</code> node</dt>
# Line 470  following:</p> Line 764  following:</p>
764      <li>If the <code>childNodes</code> list of <var>n</var> contains      <li>If the <code>childNodes</code> list of <var>n</var> contains
765      any nodes, they are in      any nodes, they are in
766      <a href="#xml-well-formedness-error" id=wfe-et-child><code>xml-well-formedness-error</code></a>.</li>      <a href="#xml-well-formedness-error" id=wfe-et-child><code>xml-well-formedness-error</code></a>.</li>
767      </ol>      <li class=ed>@@ <q cite="http://www.w3.org/TR/2006/REC-xml-20060816/#elemdecls">At user option, an XML processor MAY issue a warning when a declaration mentions an element type for which no declaration is provided, but this is not an error.</q></li>
768    </dd>      <li class=ed>@@ <q cite="http://www.w3.org/TR/2006/REC-xml-20060816/#sec-element-content">For compatibility, it is an error if the content model allows an element to match more than one occurrence of an element type in the content model. </q></li>
769  <dt>If <var>n</var> is an <code>Entity</code> node</dt>      <li class=ed>@@ #vc-MixedChildrenUnique
770    <dd>      Validity constraint: No Duplicate Types</li>
771      <ol>      <li class=ed>@@ <q cite="http://www.w3.org/TR/2006/REC-xml-20060816/#attdecls">At user option, an XML processor MAY issue a warning if attributes are declared for an element type not itself declared, but this is not an error.</q></li>
772      <li>An <a href="#entity-error" id=ee-entity-node><code>entity-error</code></a> <span class=ed>@@ if !notationName</span>.</li>      <li>If there is more than one <code>AttributeDefinition</code> node
773      <li><a href="#algorithm-to-validate-a-ncname">Validate the      with <span class=ed>attribute type <code>ID</code></span> in the
774        <code>NamedNodeMap</code> list contained in the
775        <code>attributeDefinitions</code> attribute of <var>n</var>, then raise an
776        <a href="#xml-validity-error" id=vc-one-id-per-el><code>xml-validity-error</code></a>.</li>
777        <li>If there is more than one <code>AttributeDefinition</code> node
778        with <span class=ed>attribute type <code>NOTATION</code></span> in the
779        <code>NamedNodeMap</code> list contained in the
780        <code>attributeDefinitions</code> attribute of <var>n</var>, then raise an
781        <a href="#xml-validity-error" id=vc-one-notation-per><code>xml-validity-error</code></a>.</li>
782        <li class=ed>"For interoperability, the same Nmtoken  SHOULD NOT occur more than once in the enumerated attribute types of a single element type."</li>
783        </ol>
784      </dd>
785    <dt>If <var>n</var> is an <code>Entity</code> node whose
786    <code>notationName</code> attribute value is <code>null</code> (i.e. a
787    parsed entity)</dt>
788      <dd>
789        <ol>
790        <li>Raise an
791        <a href="#entity-error" id=ee-entity-node><code>entity-error</code></a>.</li>
792        <li><a href="#algorithm-to-validate-an-ncname">Validate the
793      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>
794      <li><a href="#algorithm-to-validate-a-public-identifier" title="validate a public identifier">Validate      <li><a href="#algorithm-to-validate-a-public-identifier" title="validate a public identifier">Validate
795      the <code>publicId</code> attribute value as a public identifier</a>.</li>      the <code>publicId</code> attribute value as a public identifier</a>.</li>
796      <li>If the <code>systemId</code> attribute value contains      <li><a href="#algorithm-to-validate-a-system-identifier" title="validate a system identifier">Validate
797      both <code>"</code> and <code>'</code> characters, it is a      the <code>systemId</code> attribute value as a system identifier</a>.</li>
798      <a href="#xml-well-formedness-error" id=wfe-dt-system-id><code>xml-well-formedness-error</code></a>.</li>      <li>If the <code>publicId</code> attribute value of <var>n</var> is
799      <!-- publicId = non-null and systemId = null -->      <em>not</em> <code>null</code> and the <code>systemId</code> attribute
800      <li class=ed>@@ <code>notationName</code></li>      value of <var>n</var> is <code>null</code>, then raise an
801        <a href="#xml-well-formedness-error" id=wfe-entity-sid><code>xml-well-formedness-error</code></a>.</li>
802      <li>For each node <dfn id=var-entity-nc><var>n<sub><var>c</var></sub></var></dfn>      <li>For each node <dfn id=var-entity-nc><var>n<sub><var>c</var></sub></var></dfn>
803      in the <code>childNodes</code> list of <var>n</var>,      in the <code>childNodes</code> list of <var>n</var>,
804        <ol>        <ol>
# Line 503  following:</p> Line 817  following:</p>
817        </ol></li>        </ol></li>
818      </ol>      </ol>
819    </dd>    </dd>
820    <dt>If <var>n</var> is an <code>Entity</code> node whose
821    <code>notationName</code> attribute value is <em>not</em> <code>null</code>
822    (i.e. an unparsed entity)</dt>
823      <dd>
824        <ol>
825        <li><a href="#algorithm-to-validate-an-ncname">Validate the
826        <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>
827        <li><a href="#algorithm-to-validate-a-public-identifier" title="validate a public identifier">Validate
828        the <code>publicId</code> attribute value as a public identifier</a>.</li>
829        <li><a href="#algorithm-to-validate-a-system-identifier" title="validate a system identifier">Validate
830        the <code>systemId</code> attribute value as a system identifier</a>.</li>
831        <li>If the <code>systemId</code> attribute value of <var>n</var> is
832        <code>null</code>, then raise an
833        <a href="#xml-well-formedness-error" id=wfe-uentity-sid><code>xml-well-formedness-error</code></a>.</li>
834        <li><a href="#algorithm-to-validate-an-ncname">Validate the
835        <code>notationName</code> attribute value of <var>n</var> as an
836        <code>NCName</code></a>.</li>
837        <li class=ed>@@ #not-declared Validity constraint: Notation Declared</li>
838        <li>If the <code>childNodes</code> list of <var>n</var> contains
839        any nodes, they are in
840        <a href="#xml-well-formedness-error" id=wfe-uentity-child><code>xml-well-formedness-error</code></a>.</li>
841        </ol>
842      </dd>
843  <dt>If <var>n</var> is an <code>EntityReference</code> node</dt>  <dt>If <var>n</var> is an <code>EntityReference</code> node</dt>
844    <dd>    <dd>
845      <ol>      <ol>
846      <li>An <a href="#entity-error" id=ee-er-node><code>entity-error</code></a>.</li>      <li>An <a href="#entity-error" id=ee-er-node><code>entity-error</code></a>.</li>
847      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li><a href="#algorithm-to-validate-an-ncname">Validate the
848      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>
849      <li>For each node <dfn id=var-er-nc><var>n<sub><var>c</var></sub></var></dfn>      <li>For each node <dfn id=var-er-nc><var>n<sub><var>c</var></sub></var></dfn>
850      in the <code>childNodes</code> list of <var>n</var>,      in the <code>childNodes</code> list of <var>n</var>,
# Line 530  following:</p> Line 867  following:</p>
867  <dt>If <var>n</var> is a <code>Notation</code> node</dt>  <dt>If <var>n</var> is a <code>Notation</code> node</dt>
868    <dd>    <dd>
869      <ol>      <ol>
870      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li><a href="#algorithm-to-validate-an-ncname">Validate the
871      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>
872      <li><a href="#algorithm-to-validate-a-public-identifier" title="validate a public identifier">Validate      <li><a href="#algorithm-to-validate-a-public-identifier" title="validate a public identifier">Validate
873      the <code>publicId</code> attribute value as a public identifier</a>.</li>      the <code>publicId</code> attribute value as a public identifier</a>.</li>
874      <li>If the <code>systemId</code> attribute value contains      <li><a href="#algorithm-to-validate-a-system-identifier" title="validate a system identifier">Validate
875      both <code>"</code> and <code>'</code> characters, it is a      the <code>systemId</code> attribute value as a system identifier</a>.</li>
     <a href="#xml-well-formedness-error" id=wfe-dt-system-id><code>xml-well-formedness-error</code></a>.</li>  
876      <li>If the <code>childNodes</code> list of <var>n</var> contains      <li>If the <code>childNodes</code> list of <var>n</var> contains
877      any nodes, they are in      any nodes, they are in
878      <a href="#xml-well-formedness-error" id=wfe-notation-child><code>xml-well-formedness-error</code></a>.</li>      <a href="#xml-well-formedness-error" id=wfe-notation-child><code>xml-well-formedness-error</code></a>.</li>
# Line 545  following:</p> Line 881  following:</p>
881  <dt>If <var>n</var> is a <code>ProcessingInstruction</code> node</dt>  <dt>If <var>n</var> is a <code>ProcessingInstruction</code> node</dt>
882    <dd>    <dd>
883      <ol>      <ol>
884      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li>If the <code>target</code> attribute value matches to the string
885      <code>target</code> attribute value as an <code>NCName</code></a>.</li>      <code>xml</code> in any case combination, then raise a
     <li>If the <code>target</code> attribute value matches to  
     <code>XML</code> case-insensitively, then it is a  
886      <a href="#xml-well-formedness-error" id=wfe-pi-xml><code>xml-well-formedness-error</code></a>.</li>      <a href="#xml-well-formedness-error" id=wfe-pi-xml><code>xml-well-formedness-error</code></a>.</li>
887      <li><a href="#algorithm-to-validate-an-xml-character-data">Validate the      <li>Otherwise, <a href="#algorithm-to-validate-an-ncname">validate the
888      <code>data</code> attribute value as an <abbr>XML</abbr> character      <code>target</code> attribute value as an <code>NCName</code></a>.</li>
889        <li>Then,
890        <a href="#algorithm-to-validate-an-xml-character-data" title="validate an XML string">validate
891        the <code>data</code> attribute value as an <abbr>XML</abbr> character
892      data</a>.</li>      data</a>.</li>
893      <li>If the <code>data</code> attribute value contains      <li>If the <code>data</code> attribute value contains a string
894      a string <code>?></code>, or starts with either      <code>?></code>, then raise a
895      <code class=char>U+0009</code>, <code class=char>U+000A</code>,      <a href="#xml-well-formedness-error" id=wfe-pi-pic><code>xml-well-formedness-error</code></a>.</li>
896      <code class=char>U+000D</code>, or <code class=char>U+0020</code>      <li>If the <code>data</code> attribute value starts with either
897      character, then it is a      <code class=char>U+0009</code> <code class=charname>CHARACTER
898      <a href="#round-trip-error" id=rte-pi-data><code>round-trip-error</code></a>.</li>      TABULATION</code>, <code class=char>U+000A</code> <code class=charname>LINE
899        FEED</code>, <code class=char>U+000D</code> <code class=charname>CARRIAGE
900        RETURN</code>, or <code class=char>U+0020</code>
901        <code class=charname>SPACE</code> character, then raise a
902        <a href="#round-trip-error" id=rte-pi-s><code>round-trip-error</code></a>.</li>
903      <li>If the <code>childNodes</code> list of <var>n</var> contains      <li>If the <code>childNodes</code> list of <var>n</var> contains
904      any nodes, they are in      any nodes, then raise an
905      <a href="#xml-well-formedness-error" id=wfe-pi-child><code>xml-well-formedness-error</code></a>.</li>      <a href="#xml-well-formedness-error" id=wfe-pi-child><code>xml-well-formedness-error</code></a>.</li>
906      </ol>      </ol>
907    </dd>    </dd>
908  <dt>If <var>n</var> is a <code>Text</code> node</dt>  <dt>If <var>n</var> is a <code>Text</code> node</dt>
909    <dd>    <dd>
910      <ol>      <ol>
911      <li><a href="#algorithm-to-validate-an-xml-character-data">Validate the      <li><a href="#algorithm-to-validate-an-xml-character-data" title="validate an XML string">Validate the
912      <code>data</code> attribute value as an <abbr>XML</abbr> character      <code>data</code> attribute value as an <abbr>XML</abbr> character
913      data</a>.</li>      data</a>.</li>
914      <li>If the <code>childNodes</code> list of <var>n</var> contains      <li>If the <code>childNodes</code> list of <var>n</var> contains
# Line 651  as amended by Line 992  as amended by
992  <a href="http://www.w3.org/XML/xml-V10-4e-errata#E02">errata</a>.</p>  <a href="http://www.w3.org/XML/xml-V10-4e-errata#E02">errata</a>.</p>
993  </div>  </div>
994    
995    <p>The character class <dfn id=class-NameStartChar10><code>NameStartChar10</code></dfn>
996    contains the following characters:</p>
997    <ul class=ed>
998    </ul>
999    
1000    <p>The character class <dfn id=class-NameChar10><code>NameChar10</code></dfn>
1001    contains the following characters:</p>
1002    <ul>
1003    <li>The characters in the character class
1004    <a href="#class-NameStartChar10">NameStartChar10</a>.</li>
1005    <li class=ed></li>
1006    </ul>
1007    
1008  </div>  </div>
1009    
1010  <div id="references" class="section reference">  <div id="references" class="section reference">
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