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revision 1.15 by wakaba, Thu Nov 15 10:03:02 2007 UTC revision 1.20 by wakaba, Sat Dec 1 15:08:18 2007 UTC
# Line 18  Line 18 
18    
19  <div class="header">  <div class="header">
20  <h1>manakai's <abbr>XML</abbr> Conformance Checking</h1>  <h1>manakai's <abbr>XML</abbr> Conformance Checking</h1>
21  <h2>Working Draft <time datetime=2007-11-15>15 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 135  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 222  can be easily serialized into a valid XM Line 225  can be easily serialized into a valid XM
225  <a href="#xml-misc-warning" id=xmw-entity-value-lt><code>xml-misc-warning</code></a>.<!--  <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].  "strongly advised to avoid" in a Note in Section 2.3 of [XML10], [XML11].
227  --></li>  --></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  <li>If attribute definition whose <code>Name</code> is
232  <code>xml:space</code> has <span class=ed>declared type different from  <code>xml:space</code> has <span class=ed>declared type different from
233  (default|preserve), (default), or (preserve)</span>, then raise an  (default|preserve), (default), or (preserve)</span>, then raise an
# Line 245  declared <code>EMPTY</code>, then raise Line 251  declared <code>EMPTY</code>, then raise
251  #uniqattspec Well-formedness constraint: Unique Att Spec  #uniqattspec Well-formedness constraint: Unique Att Spec
252  #NoExternalRefs Well-formedness constraint: No External Entity References  #NoExternalRefs Well-formedness constraint: No External Entity References
253  #CleanAttrVals Well-formedness constraint: No < in Attribute Values  #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  @@ Need detailed review, but maybe should be in parsing phase
267    
268  #vc-check-rmd Validity constraint: Standalone Document Declaration  #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>  </ul>
289  </div>  </div>
# Line 280  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 310  U+000D will be serialized as &#x000D; (s Line 344  U+000D will be serialized as &#x000D; (s
344  will be raised).</span></li>  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-s><var>s</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>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  <li>If <var>s</var> begins with the string <code>xml</code> (in any
367  case combination), then raise an  case combination), then raise an
368  <a href="#xml-misc-warning" id=xmw-reserved-name><code>xml-misc-warning</code></a>.  <a href="#xml-misc-warning" id=xmw-reserved-name><code>xml-misc-warning</code></a>.
# Line 323  case combination), then raise an Line 371  case combination), then raise an
371  <code>xmlns</code>, <code>xmlns:<var>*</var></code>,  <code>xmlns</code>, <code>xmlns:<var>*</var></code>,
372  pi name <code>xml-stylesheet</code>.</span><!--  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.":  "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  xml:base and xml:id specifications violate to this sentense!  xmlns, xml-stylesheet, xml:base and xml:id specifications violate to this sentense!
375  --></li>  --></li>
376  <!-- COLON in Name is a lowercase "should not" in a Note of [XML10],  <!-- COLON in Name is a lowercase "should not" in a Note of [XML10],
377  [XML11]. -->  [XML11]. -->
378  <li class=ed>@@</li>  <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> contains any character  <li>If <var>pid</var> is <code>null</code>, abort these steps.</li>
397    that is outside of the range of <code>#x20 | #xD | #xA |  <li>If <var>pid</var> contains a character that is <em>not</em> in the
398    [a-zA-Z0-9] | [-'()+,./:=?;!*#@$_%]</code><!-- @@ TODO: formal def -->,  character class <a href="#class-PubidChar"><code>PubidChar</code></a>, then
399    then it is an  raise an
400    <a href="#xml-well-formedness-error" id=wfe-pubid-char><code>xml-well-formedness-error</code></a>.</li>  <a href="#xml-well-formedness-error" id=wfe-pubid-char><code>xml-well-formedness-error</code></a>.</li>
401    <li>If <var>pid</var> contains one of <code class=char>U+0009</code>    <li>If <var>pid</var> contains one of <code class=char>U+0009</code>
402    <code class=charname>CHARACTER TABULATION</code>,    <code class=charname>CHARACTER TABULATION</code>,
403    <code class=char>U+000A</code> <code class=charname>CARRIAGE RETURN</code>,    <code class=char>U+000A</code> <code class=charname>CARRIAGE RETURN</code>,
# Line 358  algorithm below <em class=rfc2119>MUST</ Line 409  algorithm below <em class=rfc2119>MUST</
409    <code class=char>U+0020</code> <code class=charname>SPACE</code> character    <code class=char>U+0020</code> <code class=charname>SPACE</code> character
410    immediately followed by another <code class=char>U+0020</code>    immediately followed by another <code class=char>U+0020</code>
411    <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
412    <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>.
413    <li class=ed>@@ Should we check formal-public-identifierness?</li>    <span class=ed>Is this really a roundtripness problem?  XML spec
414      does only define the way to match public identifiers in fact, no
415      canonical form.</span></li>
416    </ol>
417    
418    <p>To
419    <dfn id=algorithm-to-validate-a-system-identifier title="validate a system identifier">validate
420    a system identifier (<dfn id=var-sid><var>sid</var></dfn>)</dfn>, the
421    following algorithm <em class=rfc2119>MUST</em> be used:</p>
422    <ol>
423      <li>If <var>sid</var> is <code>null</code>, abort these steps.</li>
424    <li><a href="#algorithm-to-validate-an-xml-character-data" title="validate an XML string">Validate
425    <var>sid</var> as an <abbr>XML</abbr> string</a>.</li>
426      <li>If <var>sid</var> contains both <code class=char>U+0022</code>
427      <code class=charname>QUOTATION MARK</code> (<code class=char>"</code>) and
428      <code class=char>U+0027</code> <code class=charname>APOSTROPHE</code>
429      (<code class=char>'</code>) characters, raise an
430      <a href="#xml-well-formedness-error" id=wfe-sid-lit><code>xml-well-formedness-error</code></a>.</li>
431      <li>If <var>sid</var> contains at least one <code class=char>U+0023</code>
432      <code class=charname>NUMBER SIGN</code> (<code class=char>#</code>)
433      character, then raise an
434      <a href="#xml-misc-error" id=xme-sid-fragment><code>xml-misc-error</code></a>.</li>
435      <li class=ed>@@ If <var>sid</var> cannot be converted to a URI
436      reference, then raise a fact-level error (xml-misc-warning?).<!--
437      XML 1.0 has no conformance language for system identifier being
438      a URI reference. --></li>
439  </ol>  </ol>
440    
441  </div>  </div>
# Line 374  following:</p> Line 450  following:</p>
450  <dt>If <var>n</var> is an <code>Attr</code> node</dt>  <dt>If <var>n</var> is an <code>Attr</code> node</dt>
451    <dd>    <dd>
452      <ol>      <ol>
453      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li><a href="#algorithm-to-validate-an-ncname">Validate the
454      <code>localName</code> attribute value as an <code>NCName</code></a>.</li>      <code>localName</code> attribute value as an <code>NCName</code></a>.</li>
455      <li>If the <code>prefix</code> attribute value is different from      <li>If the <code>prefix</code> attribute value is different from
456      <code>null</code>, then <a href="#algorithm-to-validate-a-ncname">validate      <code>null</code>, then <a href="#algorithm-to-validate-an-ncname">validate
457      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>
458      <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
459      <code>childNodes</code> list of <var>n</var>,      <code>childNodes</code> list of <var>n</var>,
# Line 405  following:</p> Line 481  following:</p>
481      <li class=ed>@@ <code>specified</code>,      <li class=ed>@@ <code>specified</code>,
482      <code>manakaiAttributeType</code> (#ValueType Validity constraint: Attribute Value Type)</li>      <code>manakaiAttributeType</code> (#ValueType Validity constraint: Attribute Value Type)</li>
483      <!-- xml:space MUST be declared to be valid. -->      <!-- xml:space MUST be declared to be valid. -->
484        <li>Let <dfn id=var-v><var>v</var></dfn> be the value of the
485        attribute <code>value</code> of <var>n</var>.</li>
486        <li>Validate the <var>n</var> against the <span class=ed>declared
487        type</span> as following:
488          <dl class=switch>
489          <dt class=ed><code>ID_ATTR</code></dt>
490            <dd>
491              <ol>
492              <li><span class=ed>Validate <var>v</var> as an
493              <code>Name</code>.</span>  If it fails, then raise an
494              <a href="#xml-validity-error" id=vc-id-name><code>xml-validity-error</code></a>.</li>
495              <li><span class=ed>If <code>ID</code> <var>v</var> is defined,</span>
496              then raise an  
497              <a href="#xml-validity-error" id=vc-id-duplication><code>xml-validity-error</code></a>.</li>
498              </ol>
499            </dd>
500          <dt class=ed>IDREF_ATTR</dt>
501            <dd>
502              <ol>
503              <li><span class=ed>Validate <var>v</var> as an
504              <code>Name</code>.</span>  If it fails, then raise an
505              <a href="#xml-validity-error" id=vc-idref-name><code>xml-validity-error</code></a>.</li>
506              <li><span class=ed>If <code>ID</code> <var>v</var> is NOT
507              defined,</span> then raise an  
508              <a href="#xml-validity-error" id=vc-idref-match><code>xml-validity-error</code></a>.</li>
509              </ol>
510            </dd>
511          <dt class=ed>IDREFS_ATTR</dt>
512            <dd class=ed>@@</dd>
513          <dt class=ed>ENTITY_ATTR</dt>
514            <dd>
515              <ol>
516              <li><span class=ed>Validate <var>v</var> as an
517              <code>Name</code>.</span>  If it fails, then raise an
518              <a href="#xml-validity-error" id=vc-entname-name><code>xml-validity-error</code></a>.</li>
519              <li><span class=ed>If <code>Entity</code> <var>v</var> is NOT
520              defined,</span> then raise an  
521              <a href="#xml-validity-error" id=vc-entname-match><code>xml-validity-error</code></a>.</li>
522              </ol>
523            </dd>
524          <dt class=ed>ENTITIES_ATTR</dt>
525            <dd class=ed>@@</dd>
526          <dt class=ed>NMTOKEN_ATTR</dt>
527            <dd>
528              <ol>
529              <li><span class=ed>Validate <var>v</var> as an
530              <code>Nmtoken</code>.</span>  If it fails, then raise an
531              <a href="#xml-validity-error" id=vc-nmtok-name><code>xml-validity-error</code></a>.</li>
532              </ol>
533            </dd>
534          <dt class=ed>NMTOKENS_ATTR</dt>
535            <dd class=ed>@@</dd>
536          <dt class=ed>NOTATION_ATTR</dt>
537            <dd class=ed><var>v</var> must be one of enumerated values.
538            If not, then raise an
539            <a href="#xml-validity-error" id=vc-notatn-match><code>xml-validity-error</code></a>.</dd>
540          <dt class=ed>ENUMERATED_ATTR</dt>
541            <dd class=ed><var>v</var> must be one of enumerated values.
542            If not, then raise an
543            <a href="#xml-validity-error" id=vc-enum><code>xml-validity-error</code></a>.</dd>
544          <dt class=ed>@@</dt>
545          </dl>
546        </li>
547        <li>If <span class=ed>type ID and default is NOT #IMPLIED or #REQUIRED</span>, then
548        raise an
549        <a href="#xml-validity-error" id=vc-id-default><code>xml-validity-error</code></a>.</li>
550        <li class=ed>@@ #FixedAttr Validity constraint: Fixed Attribute Default</li>
551        <li class=ed>@@ strict serialization error for U+000D, U+000A, and
552        U+0009 characters, leading/trailing U+0020, and U+0020{2,} string?</li>
553      </ol>      </ol>
554    </dd>    </dd>
555  <dt>If <var>n</var> is an <code>AttributeDefinition</code> node</dt>  <dt>If <var>n</var> is an <code>AttributeDefinition</code> node</dt>
# Line 429  following:</p> Line 574  following:</p>
574        <a href="#algorithm-to-check-a-node" title="check a node">check        <a href="#algorithm-to-check-a-node" title="check a node">check
575        <var>n<sub><var>c</var></sub></var></a> recusrively.</li>        <var>n<sub><var>c</var></sub></var></a> recusrively.</li>
576        </ol></li>        </ol></li>
577        <li class=ed>If <code>NOTATION_ATTR</code>, enumerated values MUST
578        be declared.  If not, then raise an
579        <a href="#xml-validity-error" id=vc-notatn-declared><code>xml-validity-error</code></a>.</li>
580        <li class=ed>If <code>NOTATION_ATTR</code> or <code>ENUMERATED_ATTR</code>,
581        values MUST all be distinct.  If not, then raise an
582        <a href="#xml-validity-error" id=vc-no-duplicate-tokens><code>xml-validity-error</code></a>.</li>
583        <li class=ed>If <code>NOTATION_ATTR</code> on an <code>EMPTY</code>
584        element, then raise an
585        <a href="#xml-validity-error" id=vc-no-notation-empty><code>xml-validity-error</code></a>.</li>
586        <li class=ed>@@ #defattrvalid Validity constraint: Attribute Default Value Syntactically Correct</li>
587      </ol>      </ol>
588    </dd>    </dd>
589  <dt>If <var>n</var> is a <code>CDATASection</code> node</dt>  <dt>If <var>n</var> is a <code>CDATASection</code> node</dt>
590    <dd>    <dd>
591      <ol>      <ol>
592      <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
593      <code>data</code> attribute value as an <abbr>XML</abbr> character      <code>data</code> attribute value as an <abbr>XML</abbr> character
594      data</a>.</li>      data</a>.</li>
595      <li>If the <code>data</code> attribute value contains      <li>If the <code>data</code> attribute value contains
# Line 450  following:</p> Line 605  following:</p>
605      <ol>      <ol>
606      <li>Raise an      <li>Raise an
607      <a href="#round-trip-warning" id=rtw-comment><code>round-trip-warning</code></a>.</li>      <a href="#round-trip-warning" id=rtw-comment><code>round-trip-warning</code></a>.</li>
608      <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
609      <code>data</code> attribute value as an <abbr>XML</abbr> character      <code>data</code> attribute value as an <abbr>XML</abbr> character
610      data</a>.</li>      data</a>.</li>
611      <li>If the <code>data</code> attribute value contains      <li>If the <code>data</code> attribute value contains
# Line 517  following:</p> Line 672  following:</p>
672  <dt>If <var>n</var> is a <code>DocumentType</code> node</dt>  <dt>If <var>n</var> is a <code>DocumentType</code> node</dt>
673    <dd>    <dd>
674      <ol>      <ol>
675      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li><a href="#algorithm-to-validate-an-ncname">Validate the
676      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>
677      <li>Follow the following substeps:      <li>Follow the following substeps:
678        <ol>        <ol>
# Line 536  following:</p> Line 691  following:</p>
691      </li>      </li>
692      <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
693      the <code>publicId</code> attribute value as a public identifier</a>.</li>      the <code>publicId</code> attribute value as a public identifier</a>.</li>
694      <li>If the <code>systemId</code> attribute value contains      <li><a href="#algorithm-to-validate-a-system-identifier" title="validate a system identifier">Validate
695      both <code>"</code> and <code>'</code> characters, it is a      the <code>systemId</code> attribute value as a system identifier</a>.</li>
696      <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
697      <!-- publicId = non-null and systemId = null -->      <em>not</em> <code>null</code> and the <code>systemId</code> attribute
698        value of <var>n</var> is <code>null</code>, then raise an
699        <a href="#xml-well-formedness-error" id=wfe-dt-sid><code>xml-well-formedness-error</code></a>.
700        <span class=ed>@@ publicId == null?  Or, publicId == ""</span></li>
701      <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>
702      in the <code>childNodes</code> list of <var>n</var>,      in the <code>childNodes</code> list of <var>n</var>,
703        <ol>        <ol>
# Line 551  following:</p> Line 709  following:</p>
709        <a href="#algorithm-to-check-a-node" title="check a node">check        <a href="#algorithm-to-check-a-node" title="check a node">check
710        <var>n<sub><var>c</var></sub></var></a> recusrively.</li>        <var>n<sub><var>c</var></sub></var></a> recusrively.</li>
711        </ol></li>        </ol></li>
712      <li class=ed>@@ <code>entities</code>, <code>notations</code>,      <li>For each node in the <code>entities</code>, <code>notations</code>,
713      <code>elementTypes</code>, externally declared?</li>      and <code>elementTypes</code> lists of <var>n</var>,
714        <a href="#algorithm-to-check-a-node" title="check a node">check the
715        node</a> recursively.</li>
716        <li class=ed>@@ externally declared?</li>
717      </ol>      </ol>
718    </dd>    </dd>
719  <dt>If <var>n</var> is an <code>Element</code> node</dt>  <dt>If <var>n</var> is an <code>Element</code> node</dt>
720    <dd>    <dd>
721      <ol>      <ol>
722      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li><a href="#algorithm-to-validate-an-ncname">Validate the
723      <code>localName</code> attribute value as an <code>NCName</code></a>.</li>      <code>localName</code> attribute value as an <code>NCName</code></a>.</li>
724      <li>If the <code>prefix</code> attribute value is different from      <li>If the <code>prefix</code> attribute value is different from
725      <code>null</code>, then <a href="#algorithm-to-validate-a-ncname">validate      <code>null</code>, then <a href="#algorithm-to-validate-an-ncname">validate
726      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>
727      <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>
728      in the <code>childNodes</code> list of <var>n</var>,      in the <code>childNodes</code> list of <var>n</var>,
# Line 580  following:</p> Line 741  following:</p>
741        <var>n<sub><var>c</var></sub></var></a> recursively.</li>        <var>n<sub><var>c</var></sub></var></a> recursively.</li>
742        </ol></li>        </ol></li>
743      <li class=ed>@@ #elementvalid Validity constraint: Element Valid</li>      <li class=ed>@@ #elementvalid Validity constraint: Element Valid</li>
744      <li class=ed>@@ #uniqattspec Well-formedness constraint: Unique Att Spec</li>      <li>Let <var>attrs</var> be the value of the <code>attribute</code>
745        attribute of <var>n</var>.  Check conformance of <var>attrs</var>
746        as following:
747          <ol>
748          <li>If <var>attrs</var> contains an <code>Attr</code> node whose
749          <code>nodeName</code> attribute value is equal to that of another
750          <code>Attr</code> node in <var>attrs</var>, then raise an
751          <a href="#xml-well-formedness-error" id=wfe-uniqattspec><code>xml-well-formedness-error</code></a>.<!--
752          #uniqattspec Well-formedness constraint: Unique Att Spec --></li>
753          <li class=ed>@@ #RequiredAttr Validity constraint: Required Attribute</li>
754          </ol>
755        </li>
756      </ol>      </ol>
757    </dd>    </dd>
758  <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 590  following:</p> Line 762  following:</p>
762      <li>If the <code>childNodes</code> list of <var>n</var> contains      <li>If the <code>childNodes</code> list of <var>n</var> contains
763      any nodes, they are in      any nodes, they are in
764      <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>
765        <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>
766        <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>
767        <li class=ed>@@ #vc-MixedChildrenUnique
768        Validity constraint: No Duplicate Types</li>
769        <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>
770        <li>If there is more than one <code>AttributeDefinition</code> node
771        with <span class=ed>attribute type <code>ID</code></span> in the
772        <code>NamedNodeMap</code> list contained in the
773        <code>attributeDefinitions</code> attribute of <var>n</var>, then raise an
774        <a href="#xml-validity-error" id=vc-one-id-per-el><code>xml-validity-error</code></a>.</li>
775        <li>If there is more than one <code>AttributeDefinition</code> node
776        with <span class=ed>attribute type <code>NOTATION</code></span> in the
777        <code>NamedNodeMap</code> list contained in the
778        <code>attributeDefinitions</code> attribute of <var>n</var>, then raise an
779        <a href="#xml-validity-error" id=vc-one-notation-per><code>xml-validity-error</code></a>.</li>
780        <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>
781      </ol>      </ol>
782    </dd>    </dd>
783  <dt>If <var>n</var> is an <code>Entity</code> node</dt>  <dt>If <var>n</var> is an <code>Entity</code> node whose
784    <code>notationName</code> attribute value is <code>null</code> (i.e. a
785    parsed entity)</dt>
786    <dd>    <dd>
787      <ol>      <ol>
788      <li>An <a href="#entity-error" id=ee-entity-node><code>entity-error</code></a> <span class=ed>@@ if !notationName</span>.</li>      <li>Raise an
789      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <a href="#entity-error" id=ee-entity-node><code>entity-error</code></a>.</li>
790        <li><a href="#algorithm-to-validate-an-ncname">Validate the
791      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>
792      <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
793      the <code>publicId</code> attribute value as a public identifier</a>.</li>      the <code>publicId</code> attribute value as a public identifier</a>.</li>
794      <li>If the <code>systemId</code> attribute value contains      <li><a href="#algorithm-to-validate-a-system-identifier" title="validate a system identifier">Validate
795      both <code>"</code> and <code>'</code> characters, it is a      the <code>systemId</code> attribute value as a system identifier</a>.</li>
796      <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
797      <!-- publicId = non-null and systemId = null -->      <em>not</em> <code>null</code> and the <code>systemId</code> attribute
798      <li class=ed>@@ <code>notationName</code></li>      value of <var>n</var> is <code>null</code>, then raise an
799        <a href="#xml-well-formedness-error" id=wfe-entity-sid><code>xml-well-formedness-error</code></a>.</li>
800      <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>
801      in the <code>childNodes</code> list of <var>n</var>,      in the <code>childNodes</code> list of <var>n</var>,
802        <ol>        <ol>
# Line 623  following:</p> Line 815  following:</p>
815        </ol></li>        </ol></li>
816      </ol>      </ol>
817    </dd>    </dd>
818    <dt>If <var>n</var> is an <code>Entity</code> node whose
819    <code>notationName</code> attribute value is <em>not</em> <code>null</code>
820    (i.e. an unparsed entity)</dt>
821      <dd>
822        <ol>
823        <li><a href="#algorithm-to-validate-an-ncname">Validate the
824        <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>
825        <li><a href="#algorithm-to-validate-a-public-identifier" title="validate a public identifier">Validate
826        the <code>publicId</code> attribute value as a public identifier</a>.</li>
827        <li><a href="#algorithm-to-validate-a-system-identifier" title="validate a system identifier">Validate
828        the <code>systemId</code> attribute value as a system identifier</a>.</li>
829        <li>If the <code>systemId</code> attribute value of <var>n</var> is
830        <code>null</code>, then raise an
831        <a href="#xml-well-formedness-error" id=wfe-uentity-sid><code>xml-well-formedness-error</code></a>.</li>
832        <li><a href="#algorithm-to-validate-an-ncname">Validate the
833        <code>notationName</code> attribute value of <var>n</var> as an
834        <code>NCName</code></a>.</li>
835        <li class=ed>@@ #not-declared Validity constraint: Notation Declared</li>
836        <li>If the <code>childNodes</code> list of <var>n</var> contains
837        any nodes, they are in
838        <a href="#xml-well-formedness-error" id=wfe-uentity-child><code>xml-well-formedness-error</code></a>.</li>
839        </ol>
840      </dd>
841  <dt>If <var>n</var> is an <code>EntityReference</code> node</dt>  <dt>If <var>n</var> is an <code>EntityReference</code> node</dt>
842    <dd>    <dd>
843      <ol>      <ol>
844      <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>
845      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li><a href="#algorithm-to-validate-an-ncname">Validate the
846      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>
847      <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>
848      in the <code>childNodes</code> list of <var>n</var>,      in the <code>childNodes</code> list of <var>n</var>,
# Line 650  following:</p> Line 865  following:</p>
865  <dt>If <var>n</var> is a <code>Notation</code> node</dt>  <dt>If <var>n</var> is a <code>Notation</code> node</dt>
866    <dd>    <dd>
867      <ol>      <ol>
868      <li><a href="#algorithm-to-validate-a-ncname">Validate the      <li><a href="#algorithm-to-validate-an-ncname">Validate the
869      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>      <code>nodeName</code> attribute value as an <code>NCName</code></a>.</li>
870      <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
871      the <code>publicId</code> attribute value as a public identifier</a>.</li>      the <code>publicId</code> attribute value as a public identifier</a>.</li>
872      <li>If the <code>systemId</code> attribute value contains      <li><a href="#algorithm-to-validate-a-system-identifier" title="validate a system identifier">Validate
873      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>  
874      <li>If the <code>childNodes</code> list of <var>n</var> contains      <li>If the <code>childNodes</code> list of <var>n</var> contains
875      any nodes, they are in      any nodes, they are in
876      <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 668  following:</p> Line 882  following:</p>
882      <li>If the <code>target</code> attribute value matches to the string      <li>If the <code>target</code> attribute value matches to the string
883      <code>xml</code> in any case combination, then raise a      <code>xml</code> in any case combination, then raise a
884      <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>
885      <li>Otherwise, <a href="#algorithm-to-validate-a-ncname">validate the      <li>Otherwise, <a href="#algorithm-to-validate-an-ncname">validate the
886      <code>target</code> attribute value as an <code>NCName</code></a>.</li>      <code>target</code> attribute value as an <code>NCName</code></a>.</li>
887      <li>Then,      <li>Then,
888      <a href="#algorithm-to-validate-an-xml-character-data" title="validate an XML character data">validate      <a href="#algorithm-to-validate-an-xml-character-data" title="validate an XML string">validate
889      the <code>data</code> attribute value as an <abbr>XML</abbr> character      the <code>data</code> attribute value as an <abbr>XML</abbr> character
890      data</a>.</li>      data</a>.</li>
891      <li>If the <code>data</code> attribute value contains a string      <li>If the <code>data</code> attribute value contains a string
# Line 692  following:</p> Line 906  following:</p>
906  <dt>If <var>n</var> is a <code>Text</code> node</dt>  <dt>If <var>n</var> is a <code>Text</code> node</dt>
907    <dd>    <dd>
908      <ol>      <ol>
909      <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
910      <code>data</code> attribute value as an <abbr>XML</abbr> character      <code>data</code> attribute value as an <abbr>XML</abbr> character
911      data</a>.</li>      data</a>.</li>
912      <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 776  as amended by Line 990  as amended by
990  <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>
991  </div>  </div>
992    
993    <p>The character class <dfn id=class-NameStartChar10><code>NameStartChar10</code></dfn>
994    contains the following characters:</p>
995    <ul class=ed>
996    </ul>
997    <div class="note memo">
998    <p>This character class contains all characters allowed as the first character
999    of a string matching to the production rule
1000    <a href="http://www.w3.org/TR/2006/REC-xml-20060816/#NT-Name"><code>Name</code></a>
1001    of <abbr>XML</abbr> 1.0
1002    <cite class="bibref normative">[<a href="#ref-XML10">XML10</a>]</cite>.</p>
1003    </div>
1004    
1005    <p>The character class <dfn id=class-NameChar10><code>NameChar10</code></dfn>
1006    contains the following characters:</p>
1007    <ul>
1008    <li>The characters in the character class
1009    <a href="#class-NameStartChar10">NameStartChar10</a>.</li>
1010    <li class=ed></li>
1011    </ul>
1012    <div class="note memo">
1013    <p>This character class contains all characters allowed as the second
1014    character of a string matching to the production rule
1015    <a href="http://www.w3.org/TR/2006/REC-xml-20060816/#NT-Name"><code>Name</code></a>
1016    of <abbr>XML</abbr> 1.0
1017    <cite class="bibref normative">[<a href="#ref-XML10">XML10</a>]</cite>.</p>
1018    </div>
1019    
1020    <p>The character class <dfn id=class-PubidChar><code>PubidChar</code></dfn>
1021    contains the following characters:</p>
1022    <ul>
1023    <li><code class=char>U+0009</code> <code class=charname>CHARACTER
1024    TABULATION</code></li>
1025    <li><code class=char>U+000A</code> <code class=charname>LINE FEED</code></li>
1026    <li><code class=char>U+000D</code> <code class=charname>CARRIAGE
1027    RETURN</code></li>
1028    <li><code class=char>U+0020</code> <code class=charname>SPACE</code></li>
1029    <li><code class=char>U+0021</code> <code class=charname>EXCLAMATION MARK</code>
1030    (<code class=char>!</code>)</li>
1031    <li><code class=char>U+0023</code> <code class=charname>DOLLAR SIGN</code>
1032    (<code class=char>$</code>)</li>
1033    <li><code class=char>U+0024</code> <code class=charname>NUMBER SIGN</code>
1034    (<code class=char>#</code>)</li>
1035    <li><code class=char>U+0025</code> <code class=charname>PERCENT SIGN</code>
1036    (<code class=char>%</code>)</li>
1037    <li><code class=char>U+0027</code> <code class=charname>APOSTROPHE</code>
1038    (<code class=char>'</code>)</li>
1039    <li><code class=char>U+0028</code> <code class=charname>LEFT PARENTHESIS</code>
1040    (<code class=char>(</code>)</li>
1041    <li><code class=char>U+0029</code> <code class=charname>RIGHT
1042    PARENTHESIS</code> (<code class=char>)</code>)</li>
1043    <li><code class=char>U+002A</code> <code class=charname>ASTERISK</code>
1044    (<code class=char>*</code>)</li>
1045    <li><code class=char>U+002B</code> <code class=charname>PLUS SIGN</code>
1046    (<code class=char>+</code>)</li>
1047    <li><code class=char>U+002C</code> <code class=charname>COMMA</code>
1048    (<code class=char>,</code>)</li>
1049    <li><code class=char>U+002D</code> <code class=charname>HYPHEN-MINUS</code>
1050    (<code class=char>-</code>)</li>
1051    <li><code class=char>U+002E</code> <code class=charname>FULL STOP</code>
1052    (<code class=char>.</code>)</li>
1053    <li><code class=char>U+002F</code> <code class=charname>SOLIDUS</code>
1054    (<code class=char>/</code>)</li>
1055    <li><code class=char>U+003A</code> <code class=charname>COLON</code>
1056    (<code class=char>:</code>)</li>
1057    <li><code class=char>U+003B</code> <code class=charname>SEMICOLON</code>
1058    (<code class=char>;</code>)</li>
1059    <li><code class=char>U+003D</code> <code class=charname>EQUAL SIGN</code>
1060    (<code class=char>=</code>)</li>
1061    <li><code class=char>U+003F</code> <code class=charname>QUESTION MARK</code>
1062    (<code class=char>?</code>)</li>
1063    <li><code class=char>U+0040</code> <code class=charname>COMMERCIAL AT</code>
1064    (<code class=char>@</code>)</li>
1065    <li><code class=char>U+005F</code> <code class=charname>LOW LINE</code>
1066    (<code class=char>_</code>)</li>
1067    </ul>
1068    <div class="note memo">
1069    <p>This character class contains all characters allowed in the production rule
1070    <a href="http://www.w3.org/TR/2006/REC-xml-20060816/#NT-PubidChar"><code>PubidChar</code></a>
1071    of <abbr>XML</abbr> 1.0
1072    <cite class="bibref normative">[<a href="#ref-XML10">XML10</a>]</cite>.</p>
1073    </div>
1074    
1075  </div>  </div>
1076    
1077  <div id="references" class="section reference">  <div id="references" class="section reference">
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