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revision 1.3 by wakaba, Sun Dec 2 04:46:21 2007 UTC revision 1.18 by wakaba, Tue Dec 4 11:08:48 2007 UTC
# Line 3  Line 3 
3  <head>  <head>
4  <title>DOM Document Type Definition Module</title>  <title>DOM Document Type Definition Module</title>
5  <link rel="stylesheet" href="http://suika.fam.cx/www/style/html/spec">  <link rel="stylesheet" href="http://suika.fam.cx/www/style/html/spec">
6    <link rel="stylesheet" href="http://suika.fam.cx/www/style/def/dom">
7  <link rel="license" href="http://suika.fam.cx/c/gnu/fdl">  <link rel="license" href="http://suika.fam.cx/c/gnu/fdl">
8  </head>  </head>
9  <body class="has-abstract">  <body class="has-abstract">
10    
11  <div class="header">  <div class="header">
12  <h1>DOM Document Type Definition Module</h1>  <h1>DOM Document Type Definition Module</h1>
13  <h2>Working Draft <time datetime=2007-12-01>1 December 2007</time></h2>  <h2>Working Draft <time datetime=2007-12-04>4 December 2007</time></h2>
14    
15  <dl class="versions-uri">  <dl class="versions-uri">
16  <dt>This Version</dt>  <dt>This Version</dt>
# Line 124  raised is undefined.</p> Line 125  raised is undefined.</p>
125  interface.</p>  interface.</p>
126    
127  <p class=ed>@@ ref to DOM Binding Spec</p>  <p class=ed>@@ ref to DOM Binding Spec</p>
128    
129    <p>If the <code>strictErrorChecking</code> attribute of the
130    <code>Document</code> node is <code>false</code>, the methods are
131    not required to raise exceptions <span class=ed>[DOM3]</span>.</p>
132    
133    <div class=ed>
134    <p>Conformant product classes: implementation, XML parser (XML document ->
135    DOM converter), XML serializer (DOM -> XML document covnerter).
136    XML Infoset -> DOM converter, and DOM -> XML Infoset converter.</p>
137    </div>
138  </div>  </div>
139    
140  <div class=section id=dom-dtdef>  <div class=section id=dom-dtdef>
# Line 138  consists of three interfaces:</p> Line 149  consists of three interfaces:</p>
149  <li><a href="#AttributeDefinition"><code>AttributeDefinition</code></a></li>  <li><a href="#AttributeDefinition"><code>AttributeDefinition</code></a></li>
150  </ul>  </ul>
151    
152  <p>In addition, it adds methods, attributes, and/or constants to interfaces  <p>In addition, it modifies interfaces
153  <a href="#Node"><code>Node</code></a>,  <a href="#Node"><code>Node</code></a>,
154    <a href="#DocumentType"><code>DocumentType</code></a>,
155  <a href="#Entity"><code>Entity</code></a>,  <a href="#Entity"><code>Entity</code></a>,
156  <a href="#EntityReference"><code>EntityReference</code></a>, and  <a href="#EntityReference"><code>EntityReference</code></a>,
157  <a href="#Notation"><code>Notation</code></a>.  <a href="#Notation"><code>Notation</code></a>, and
158  It modifies semantics of some of methods and attributes in  <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a>.</p>
 <a href="#Node"><code>Node</code></a> and  
 <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a>  
 interfaces, for the support of new interfaces.</p>  
159    
160  <div class=section id=features>  <div class=section id=features>
161  <h3>Feature Name</h3>  <h3>Feature Name</h3>
# Line 171  feature names with or without version nu Line 180  feature names with or without version nu
180  aforementioned cases.</p>  aforementioned cases.</p>
181  </div>  </div>
182    
183    <div class=section id=section-node>
184    <h3>Modifications to the <code id=Node>Node</code> Interface</h3>
185    
186    <p>The implementation of the
187    <a href="#Node"><code>Node</code></a> interface
188    <em class=rfc2119>MUST</em> be modified as following:</p>
189    <pre class=idl><code>// Additions to the Node interface
190    
191    // Additions to the NodeType definition group
192    const unsigned short <a href="#ELEMENT_TYPE_DEFINITION_NODE">ELEMENT_TYPE_DEFINITION_NODE</a> = 81001;
193    const unsigned short <a href="#ATTRIBUTE_DEFINITION_NODE">ATTRIBUTE_DEFINITION_NODE</a> = 81002;
194    </pre>
195    
196    <p>This specification adds two new types (subinterfaces) of
197    <a href="#Node"><code>Node</code></a>: element type definition (node type
198    <a href="#ELEMENT_TYPE_DEFINITION_NODE"><code>ELEMENT_TYPE_DEFINITION_NODE</code></a>,
199    interface
200    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>) and
201    attribute definition (node type
202    <a href="#ATTRIBUTE_DEFINITION_NODE"><code>ATTRIBUTE_DEFINITION_NODE</code></a>,
203    interface
204    <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>).  For
205    these kinds of nodes, methods and attributes in the
206    <a href="#Node"><code>Node</code></a> interface must behave as following:</p>
207    
208    <dl>
209    <dt><code id=attributes>attributes</code></dt>
210      <dd>
211        <p>On getting, the attribute <em class=rfc2119>MUST</em> return
212        <code>null</code>.</p>
213      </dd>
214    <dt><code id=baseURI>baseURI</code></dt>
215      <dd>
216        <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
217        value of the <a href="#baseURI"><code>baseURI</code></a> attribute
218        of the node in the <code>ownerDocument</code> attribute of the node.
219        Note that the value might be <code>null</code>.</p>
220      </dd>
221    <dt><code id=nodeName>nodeName</code></dt>
222      <dd>
223        <p>If the node is an
224        <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>:
225        On getting, the attribute <em class=rfc2119>MUST</em> return the
226        name of the element type definition represented by the node.</p>
227    
228        <p>If the node is an
229        <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>:
230        On getting, the attribute <em class=rfc2119>MUST</em> return the
231        name of the attribute definition represented by the node.</p>
232      </dd>
233    <dt><code id=nodeType>nodeType</code></dt>
234      <dd>
235        <p>On getting, the attribute <em class=rfc2119>MUST</em> return
236        <a href="#ELEMENT_TYPE_DEFINITION_NODE"><code>ELEMENT_TYPE_DEFINITION_NODE</code></a>
237        (if the node is an
238        <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>) or
239        <a href="#ATTRIBUTE_DEFINITION_NODE"><code>ATTRIBUTE_DEFINITION_NODE</code></a>
240        (if the node is an
241        <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>).</p>
242    
243        <!-- NodeType -->
244    <p>Two constants are added to the <code id=NodeType>NodeType</code>
245    definition group of the <a href="#Node"><code>Node</code></a> interface as
246    following:</p>
247    <table>
248    <thead>
249    <tr><th scope=col>Name<th scope=col>Value<th scope=col>Description</tr>
250    </thead>
251    <tbody>
252    <tr>
253    <th scope=row><dfn id=ELEMENT_TYPE_DEFINITION_NODE class=dom-const><code>ELEMENT_TYPE_DEFINITION_NODE</code></dfn>
254    <td><code>81001</code><td>The node is an
255    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>.</tr>
256    <tr>
257    <th scope=row><dfn id=ATTRIBUTE_DEFINITION_NODE class=dom-const><code>ATTRIBUTE_DEFINITION_NODE</code></dfn>
258    <td><code>81002</code><td>The node is an
259    <a href="#ElementTypeDefinition"><code>AttributeDefinition</code></a>.</tr>
260    </tbody>
261    </table>
262      </dd>
263    <dt><code id=nodeValue>nodeValue</code> and
264    <code id=textContent>textContent</code></dt>
265      <dd>
266        <p>If the node is an
267        <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>:
268        On getting, the attributes <em class=rfc2119>MUST</em> return the
269        name of the element type.</p>
270    
271        <div class="note memo">
272          <p>Thus, on setting the attributes does nothing
273          <span class=ed>[DOM3]</span>.</p>
274        </div>
275    
276        <p>On setting, the <a href="#textContent"><code>textContent</code></a>
277        attribute <em class=rfc2119>MUST NOT</em> raise a
278        <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>.
279        <span class=ed>@@ I forgot why this requirement is necessary.</span></p>
280    
281        <p>If the node is an
282        <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>:</p>
283    
284        <pre class=ed>
285    The getter of the [CODE(DOMa)@en[[[nodeValue]]]] attribute
286    of an [CODE(DOMi)@en[[[AttributeDefinition]]]] object
287    [['''MUST''']] return the normalized default value
288    of the attribute.
289    
290    @@
291    
292    [4] The getter of the [CODE(DOMa)@en[[[textContent]]]]
293    attribute of an [CODE(DOMi)@en[[[AttributeDefinition]]]]
294    object [['''MUST''']] behave as if it were an
295    [CODE(DOMi)@en[[[Attr]]]] object.
296    
297    The setter of the [CODE(DOMa)@en[[[textContent]]]] attribute
298    of an [CODE(DOMi)@en[[[AttributeDefinition]]]] object
299    [['''MUST''']] behave as if the following algorithm
300    is performed:
301    = If the [CODE(DOMi)@en[[[AttributeDefinition]]]]
302    object is read-only, then throw an
303    [CODE(DOMc)@en[[[NO_MODIFICATION_ALLOWED_ERR]]]].
304    = Remove any child node the node has.
305    = If the new value is not empty and not [CODE(IDL)@en[[[null]]]],
306    then create a [CODE(DOMi)@en[[[Text]]]] node
307    whose [CODE(DOMa)@en[[[data]]]] is the new value
308    and append it to the [CODE(DOMi)@en[[[AttributeDefinition]]]].
309    </pre>
310      </dd>
311    <dt class=ed>@@ ...</dt>
312    </dl>
313    
314    </div>
315    
316    <div class=section id=section-documentxdoctype>
317    <h3>The <code>DocumentXDoctype</code> Interface</h3>
318    
319    <p>The <a href="#DocumentXDoctype"><code>DocumentXDoctype</code></a> interface
320    <em class=rfc2119>MUST</em> be implemented as following:</p>
321    <pre class=idl><code>interface <dfn id=DocumentXDoctype><code>DocumentXDoctype</code></dfn> {
322      DocumentType <a href="#createDocumentTypeDefinition">createDocumentTypeDefinition</a>
323        (in DOMString <a href="#createDocumentTypeDefinition-name"><var>name</var></a>)
324        raises (DOMException);
325      <a href="#ElementTypeDefinition">ElementTypeDefinition</a> <a href="#createElementTypeDefinition">createElementTypeDefinition</a>
326        (in DOMString <a href="#createElementTypeDefinition-name"><var>name</var></a>)
327        raises (DOMException);
328      <a href="#AttributeDefinition">AttributeDefinition</a> <a href="#createAttributeDefinition">createAttributeDefinition</a>
329        (in DOMString <a href="#createAttributeDefinition-name"><var>name</var></a>)
330        raises (DOMException);
331      <a href="#Entity">Entity</a> <a href="#createGeneralEntity">createGeneralEntityDefinition</a>
332        (in DOMString <a href="#createGeneralEntity-name"><var>name</var></a>)
333        raises (DOMException);
334      <a href="#Notation">Notation</a> <a href="#createNotation">createNotation</a>
335        (in DOMString <a href="#createNotation-name"><var>name</var></a>)
336        raises (DOMException);
337    }</code></pre>
338    
339    <div class=ed>@@ cast definition</div>
340    
341    <dl>
342    <dt><dfn id=createDocumentTypeDefinition class=dom-method><code>createDocumentTypeDefinition</code></dfn>,
343    method</dt>
344      <dd>
345        <p>This method creates a <code>DocumentType</code> node with the specified
346        name, belonging to the document.</p>
347        <p>The <dfn id=createDocumentTypeDefinition-name class=dom-param><var>name</var></dfn>
348        parameter is the name of the document type.</p>
349    
350        <p>When invoked, the method <em class=rfc2119>MUST</em> create and
351        return a <code>DocumentType</code> node with the following attributes:</p>
352        <dl>
353        <dt><code>attributes</code>, <code>parentNode</code></dt>
354          <dd><code>null</code>.</dd>
355        <dt><code>elementTypes</code>, <code>generalEntities</code>, and
356        <code>notations</code></dt>
357          <dd>Empty <code>NamedNodeMap</code> objects.</dd>
358        <dt><code>entities</code></dt>
359          <dd>The same value as the <code>generalEntities</code> attribute.</dd>
360        <dt><code>childNodes</code></dt>
361          <dd>An empty <code>NodeList</code> object.</dd>
362        <dt><code>internalSubset</code>, <code>publicId</code>, and
363        <code>systemId</code></dt>
364          <dd>Empty strings.</dd>
365        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
366          <dd><code>false</code>.</dd>
367        <dt><code>nodeName</code></dt>
368          <dd><a href="#createDocumentTypeDefinition-name"><var>name</var></a>.</dd>
369        <dt><code>ownerDocument</code></dt>
370          <dd>The <code>Document</code> over which the method is invoked.</dd>
371        </dl>
372        <p>In addition, the method <em class=rfc2119>MUST</em> be marked as
373        containing five general entity declarations: <code>amp</code>,
374        <code>lt</code>, <code>gt</code>, <code>quot</code>, and
375        <code>apos</code>.</p>
376      </dd>
377    <dt><dfn id=createElementTypeDefinition class=dom-method><code>createElementTypeDefinition</code></dfn>,
378    method</dt>
379      <dd>
380        <p>This method creates a <code>ElementTypeDefinition</code> node with the
381        specified name, belonging to the document.</p>
382        <p>The <dfn id=createElementTypeDefinition-name class=dom-param><var>name</var></dfn>
383        parameter is the name of the element type defined by the element
384        type definition.</p>
385    
386        <p>When invoked, the method <em class=rfc2119>MUST</em> create and
387        return an
388        <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
389        node with the following attributes:</p>
390        <dl>
391        <dt><a href="#attributeDefinitions"><code>attributeDefinitions</code></a></dt>
392          <dd>An empty <code>NamedNodeMap</code> object.</dd>
393        <dt><code>attributes</code>, <code>parentNode</code></dt>
394          <dd><code>null</code>.</dd>
395        <dt><code>childNodes</code></dt>
396          <dd>An empty <code>NodeList</code> object.</dd>
397        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
398          <dd><code>false</code>.</dd>
399        <dt><code>nodeName</code></dt>
400          <dd><a href="#createElementTypeDefinition-name"><var>name</var></a>.</dd>
401        <dt><code>ownerDocument</code></dt>
402          <dd>The <code>Document</code> node over which the method is invoked.</dd>
403        <dt><a href="#ownerDocumentTypeDefinition"><code>ownerDocumentTypeDefinition</code></a></dt>
404          <dd><code>null</code>.</dd>
405        <dt class=ed>@@ Ensure all attributes are defined</dt>
406        </dl>
407      </dd>
408    <dt><dfn id=createAttributeDefinition class=dom-method><code>createAttributeDefinition</code></dfn>,
409    method</dt>
410      <dd>
411        <p>This method creates a <code>AttributeDefinition</code> node with the
412        specified name, belonging to the document.</p>
413        <p>The <dfn id=createAttributeDefinition-name class=dom-param><var>name</var></dfn>
414        parameter is the name of the attribute defined by the attribute
415        definition.</p>
416    
417        <p>When invoked, the method <em class=rfc2119>MUST</em> create and
418        return an
419        <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
420        node with the following attributes:</p>
421        <dl>
422        <dt><code>allowedTokens</code></dt>
423          <dd>An empty <code>DOMStringList</code> object.</dd>
424        <dt><code>attributes</code>,
425        <a href="#ownerElementTypeDefinition"><code>ownerElementTypeDefinition</code></a>,
426        and <code>parentNode</code></dt>
427          <dd><code>null</code>.</dd>
428        <dt><code>childNodes</code></dt>
429          <dd>An empty <code>NodeList</code> object.</dd>
430        <dt><code>declaredType</code></dt>
431          <dd><a href="#NO_TYPE_ATTR"><code>NO_TYPE_ATTR</code></a>.</dd>
432        <dt><code>defaultType</code></dt>
433          <dd><a href="#UNKNOWN_DEFAULT"><code>UNKNOWN_DEFAULT</code></a>.</dd>
434        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
435          <dd><code>false</code>.</dd>
436        <dt><code>nodeName</code></dt>
437          <dd><a href="#createAttributeDefinition-name"><var>name</var></a>.</dd>
438        <dt><code>ownerDocument</code></dt>
439          <dd>The <code>Document</code> node over which the method is invoked.</dd>
440        <dt class=ed>@@ Ensure all attributes are defined</dt>
441        </dl>
442    
443        <div class=ed>
444        <p>@@ Should we keep these statements?:
445    However, if the &lt;cfg::cfg|xml-id> configuration
446    parameter is set to <code>true</code> and the <var>name</var>
447    is <code>xml:id</code>, then the [CODE(DOMa)@en[[[declaredType]]]]
448    attribute is set to <code>ID_ATTR</code>.
449    [CODE(DOMa)@en[[[defaultType]]]]?</p>
450        </div>
451      </dd>
452    <dt><dfn id=createGeneralEntity class=dom-method><code>createGeneralEntity</code></dfn>,
453    method</dt>
454      <dd>
455        <p>This method creates a <a href="#Entity"><code>Entity</code></a> node
456        with the specified name, which represents a general entity, belonging to
457        the document.</p>
458        <p>The <dfn id=createGeneralEntity-name class=dom-param><var>name</var></dfn>
459        parameter is the name of the general entity.</p>
460    
461        <p>When invoked, the method <em class=rfc2119>MUST</em> create and return
462        an <a href="#Entity"><code>Entity</code></a> node with the following
463        attributes:</p>
464        <dl>
465        <dt><code>attributes</code>, <code>notationName</code>,
466        <a href="#ownerDocumentTypeDefinition"><code>ownerDocumentTypeDefinition</code></a>,
467        and <code>parentNode</code></dt>
468          <dd><code>null</code>.</dd>
469        <dt><code>childNodes</code></dt>
470          <dd>An empty <code>NodeList</code> object.</dd>
471        <dt><code>manakaiDeclarationBaseURI</code>,
472        <code>manakaiEntityBaseURI</code>, and
473        <code>manakaiEntityURI</code> <span class=ed>@@ ref</span></dt>
474          <dd>No explicit value is set.</dd>
475        <dt><code>manakaiHasReplacementTree</code> and
476        <code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
477          <dd><code>false</code>.</dd>
478        <dt><code>nodeName</code></dt>
479          <dd><a href="#createGeneralEntity-name"><var>name</var></a>.</dd>
480          <dd>
481            <div class="note memo">
482              <p>It is not an error for
483              <a href="#createGeneralEntity-name"><var>name</var></a> matching
484              to the name of one of predefined general parsed entities in
485              <abbr>XML</abbr> or <abbr>HTML</abbr>.  For example,
486              <a href="#createGeneralEntity-name"><var>name</var></a> might be
487              <code>amp</code>, resulting in an
488              <a href="#Entity"><code>Entity</code></a> node
489              with its <code>nodeName</code> attribute set to <code>amp</code>.</p>
490            </div>
491          </dd>
492        <dt><code>ownerDocument</code></dt>
493          <dd>The <code>Document</code> node over which the method is invoked.</dd>
494        <dt><code>publicId</code>, and <code>systemId</code></dt>
495          <dd><code>null</code>.</dd>
496          <dd class=ed>@@ publicId and systemId should be empty string?</dd>
497        <dt class=ed>@@ Ensure all attributes are defined</dd>
498        </dl>
499      </dd>
500    <dt><dfn id=createNotation class=dom-method><code>createNotation</code></dfn>,
501    method</dt>
502      <dd>
503        <p>This method creates a <code>Notation</code> node with the
504        specified name, belonging to the document.</p>
505        <p>The <dfn id=createNotation-name class=dom-param><var>name</var></dfn>
506        parameter is the name of the notation.</p>
507    
508        <p>When invoked, the method <em class=rfc2119>MUST</em> create and return
509        a <code>Notation</code> node with the following attributes:</p>
510        <dl>
511        <dt><code>attributes</code>,
512        <a href="#ownerDocumentTypeDefinition"><code>ownerDocumentTypeDefinition</code></a>,
513        and <code>parentNode</code></dt>
514          <dd><code>null</code>.</dd>
515        <dt><code>childNodes</code></dt>
516          <dd>An empty <code>NodeList</code> object.</dd>
517        <dt><code>manakaiDeclarationBaseURI</code></dt>
518          <dd>No explicit value is set.</dd>
519        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
520          <dd><code>false</code>.</dd>
521        <dt><code>nodeName</code></dt>
522          <dd><a href="#createNotation-name"><var>name</var></a>.</dd>
523        <dt><code>ownerDocument</code></dt>
524          <dd>The <code>Document</code> node over which the method is invoked.</dd>
525        <dt><code>publicId</code> and <code>systemId</code></dt>
526          <dd><code>null</code>.</dd>
527          <dd class=ed>@@ publicId and systemId should be empty string?</dd>
528        <dt class=ed>@@ Ensure all attributes are defined</dt>
529        </dl>
530      </dd>
531    </dl>
532    
533    <p>These methods <em class=rfc2119>MUST</em> raise an
534    <code>INVALID_CHARACTER_ERR</code> exception <span class=ed>@@ ref</span>
535    if <var>name</var> is <em>not</em> a legal <code>Name</code> according to
536    the <abbr>XML</abbr> version in use, as specified in the
537    <code>xmlVersion</code> attribute of the <code>Document</code> node.</p>
538    
539    <div class="note memo">
540    <p>Non$B!>(B<abbr>XML</abbr> case is intentionally left unspecified for now,
541    since <abbr>DOM3</abbr> specification <span class=ed>@@ ref</span> does not
542    define it for <code>Document</code> methods.</p>
543    
544    <p><var>name</var> does not have to be a namespace qualified name.</p>
545    </div>
546    
547    </div>
548    
549    
550    <div class=section id=section-documenttype>
551    <h3>Modifications to the <code id=DocumentType>DocumentType</code>
552    Interface</h3>
553    
554    <p>A <a href="#DocumentType"><code>DocumentType</code></a> interface
555    <em class=rfc2119>MAY</em> contain zero or more
556    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a>
557    nodes in the <code>NodeList</code> object contained in the
558    <code>childNodes</code> attribute of the
559    <a href="#DocumentType"><code>DocumentType</code></a> node.</p>
560    
561    <p>If the <a href="#DocumentType"><code>DocumentType</code></a> node is created
562    during the process to create a <abbr>DOM</abbr> from an <abbr>XML</abbr>
563    document, the <code>NodeList</code> object in the <code>childNodes</code>
564    object <em class=rfc2119>MUST</em> contains the
565    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a>
566    nodes representing the processing instructions in the document type
567    definition of the document processed <span class=ed>@@ ref</span> by
568    the <abbr>XML</abbr> processor.  If the
569    <a href="#DocumentType"><code>DocumentType</code></a> node is marked
570    as read$B!>(Bonly, then all the child nodes <em class=rfc2119>MUST</em>
571    also be marked as read$B!>(Bonly.</p>
572    
573    <p>If a <a href="#DocumentType"><code>DocumentType</code></a> node is created
574    from a document type declaration information item <span class=ed>@@ ref</span>,
575    the <code>NodeList</code> object in the <code>childNodes</code> attribute
576    of the node <em class=rfc2119>MUST</em> contain the
577    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a> nodes
578    created from the processing instruction information items in the list in the
579    [children] property of the document type declaration item in the same
580    order.</p>
581    
582    <p>If a <a href="#DocumentType"><code>DocumentType</code></a> node is mapped to
583    a document type declaration information item, the list in the [children]
584    property <em class=rfc2119>MUST</em> contain the processng instruction
585    information items created from the
586    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a> nodes
587    in the <code>NodeList</code> object in the <code>childNodes</code> attribute
588    of the <a href="#DocumentType"><code>DocumentType</code></a> node.</p>
589    
590    <p>The implementation of the
591    <a href="#DocumentType"><code>DocumentType</code></a> interface
592    <em class=rfc2119>MUST</em> be modified as following:</p>
593    <pre class=idl><code>// Modifications to the DocumentType interface
594      attribute DOMString <a href="#publicId">publicId</a>;
595      attribute DOMString <a href="#systemId">systemId</a>;
596    
597      attribute DOMString <a href="#internalSubset">internalSubset</a>;
598    </code></pre>
599    
600    <p>The <code id=publicId>publicId</code> attribute and the
601    <code id=systemId>systemId</code> attribute of
602    <a href="#DocumentType"><code>DocumentType</code></a>,
603    <a href="#Entity"><code>Entity</code></a>, and
604    <a href="#Notation"><code>Notation</code></a> interfaces are no longer
605    read$B!>(Bonly.</p>
606    
607    <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
608    <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
609    exception if the node is read$B!>(Bonly <span class=ed>@@ ref</span>.  
610    Otherwise, it <em class=rfc2119>MUST</em> set the specified value as the value
611    associated to the attribute.  No normalization, relative reference resolution,
612    or lexical validation is performed. <span class=ed>@@ If the new
613    value is <code>null</code>, ...</span></p>
614    
615    <div class="note memo">
616    <p>Setting an invalid identifier might make the node unserializable.
617    Setting a public identifier while leaveing system identifier unspecified
618    would also make the <a href="#DocumentType"><code>DocumentType</code></a>
619    or <a href="#Entity"><code>Entity</code></a> node unserializable.</p>
620    </div>
621    
622    <div class=ed>
623    <p>ISSUE: In HTML5, Firefox 1.5, and Opera 9, not specifying public or system identifier results in empty strings.</p>
624    </div>
625    
626    <p>The <code id=internalSubset>internalSubset</code> attribute of the
627    <a href="#DocumentType"><code>DocumentType</code></a> interface is no longer
628    read$B!>(Bonly.</p>
629    
630    <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
631    <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
632    exception if the node is read$B!>(Bonly <span class=ed>@@ ref</span>.  
633    Otherwise, it <em class=rfc2119>MUST</em> set the specified value as the value
634    associated to the attribute.  No normalization, or lexical validation is
635    performed. <span class=ed>@@ If the new value is <code>null</code>,
636    ...</span></p>
637    
638    </div>
639    
640    <div class=section id=section-documenttypedefinition>
641    <h3>The <code>DocumentTypeDefinition</code> Interface</h3>
642    
643    <div class="note memo">
644    <p>This interface is a separated interface from the
645    <a href="#DocumentType"><code>DocumentType</code></a>, not a set of extensions
646    to the <a href="#DocumentType"><code>DocumentType</code></a>,
647    for the historical reason.</p>
648    </div>
649    
650    <p>The
651    <a href="#DocumentTypeDefinition"><code>DocumentTypeDefinition</code></a>
652    interface <em class=rfc2119>MUST</em> be implemented as following:</p>
653    <pre class=idl><code>interface <dfn id=DocumentTypeDefinition><code>DocumentTypeDefinition</code></dfn> {
654      readonly attribute NamedNodeMap <a href="#elementTypes">elementTypes</a>;
655      readonly attribute NamedNodeMap <a href="#generalEntities">generalEntities</a>;
656      readonly attribute NamedNodeMap <a href="#notations">notations</a>;
657    
658      <a href="#ElementTypeDefinition">ElementTypeDefinition</a> <a href="#getElementTypeDefinitionNode">getElementTypeDefinitionNode</a>
659        (in DOMString <a href="#getElementTypeDefinitionNode-name"><var>name</var></a>);
660      <a href="#Entity">Entity</a> <a href="#getGeneralEntityNode">getGeneralEntityNode</a>
661        (in DOMString <a href="#getGeneralEntityNode-name"><var>name</var></a>);
662      <a href="#Notation">Notation</a> <a href="#getNotationNode">getNotationNode</a>
663        (in DOMString <a href="#getNotationNode-name"><var>name</var></a>);
664    
665      void <a href="#setElementTypeDefinitionNode">setElementTypeDefinitionNode</a>
666        (in DOMString <a href="#setElementTypeDefinitionNode-node"><var>node</var></a>)
667        raises (DOMException);
668      void <a href="#setGeneralEntityNode">setGeneralEntityNode</a>
669        (in DOMString <a href="#setGeneralEntityNode-node"><var>node</var></a>)
670        raises (DOMException);
671      void <a href="#setNotationNode">setNotationNode</a>
672        (in DOMString <a href="#setNotationNode-node"><var>node</var></a>)
673        raises (DOMException);
674    }</code></pre>
675    
676    <pre class=ed>
677    [1] In an implementation that supports the
678    [CODE(URI)@en[[[http://suika.fam.cx/www/2006/feature/XDoctype]]]]
679    feature, a [CODE(DOMi)@en[[[DocumentType]]]] node
680    must implement the [CODE(DOMi)@en[[[DocumentTypeDefinition]]]]
681    interface.  See [[DOM XML Document Type Definition]>>3] for
682    details.
683    </pre>
684    
685    <dl>
686    <dt><dfn id=elementTypes class=dom-attr><code>elementTypes</code></dfn> of
687    type <code>NamedNodeMap</code>, read$B!>(Bonly</dt>
688      <dd><p>A live <code>NamedNodeMap</code> object that contains all the element
689      type definitions belonging to the <code>DocumentType</code> node.</p>
690    
691      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
692      <code>NamedNodeMap</code> object that contains all the
693      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
694      nodes belonging to the <code>DocumentType</code> node.  The
695      <code>NamedNodeMap</code> object <em class=rfc2119>MUST</em> be read$B!>(Bonly
696      if and only if the node is read$B!>(Bonly.  The <code>NamedNodeMap</code>
697      object <em class=rfc2119>MUST</em> be live and the same object
698      <em class=rfc2119>MUST</em> be returned for any invocation.</p>
699    
700      <p>If the <code>DocumentType</code> node is created during the process
701      to create a <abbr>DOM</abbr> from an <abbr>XML</abbr> document, the following
702      requirements are applied:  The <code>NamedNodeMap</code> object in the
703      <a href="#elementTypes"><code>elementType</code></a> attribute
704      <em class=rfc2119>MUST</em> be so transformed that the object contains
705      the <code>ElementTypeDefinition</code> nodes for the element types
706      whose name is presented as the <code>Name</code> of the element type or
707      attribute definition list declarations processed by the <abbr>XML</abbr>
708      processor.  If there is more than one element type declarations for an
709      element type, then the declarations other than the first one
710      <em class=rfc2119>MUST</em> be ignored for the purpose of constructing the
711      <code>NamedNodeMap</code> object.</p></dd>
712    <dt><dfn id=generalEntities class=dom-attr><code>generalEntities</code></dfn>
713    of type <code>NamedNodeMap</code>, read$B!>(Bonly</dt>
714      <dd><p>A live <code>NamedNodeMap</code> object that contains all the general
715      entities belonging to the <code>DocumentType</code> node.</p>
716      
717      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
718      same value as the <code>entities</code> attribute (defined in the
719      <code>DocumentType</code> interface) of the same node.</p>
720    
721      <div class="note memo">
722        <p>This attribute is part of the interface for historical reason.</p>
723      </div></dd>
724    <!--
725    All entities declared in the document type definition
726    contained in or referenced from the document entity
727    might not be exposed through this collection, depending
728    on the information provided by the XML processor for
729    the DOM implementation.  In particular, it might not
730    contain any entity if entity references are expanded
731    at the parse time.  An implementation [['''MUST NOT''']]
732    expose an [CODE(DOMi)@en[[[Entity]]]] node whose [CODE(DOMa)@en[[[nodeName]]]]
733    is equal to the name of one of five predefined general entities in
734    XML through the collection as the result of parsing of an XML
735    document that has no error.  Duplicate entity declarations are also discarded.
736    
737    The attribute [['''MUST''']] return the [CODE(DOMi)@en[[[NamedNodeMap]]]]
738    object that contains all the [CODE(DOMi)@en[[[Entity]]]] nodes
739    representing general entities belong to the node.  The returned
740    [CODE(DOMi)@en[[[NamedNodeMap]]]] object [['''MUST''']] be read-only if and only if
741    the node is read-only. Note that the [CODE(DOMi)@en[[[NamedNodeMap]]]] object is live
742    and therefore any change of read-only flag on the node is immediately
743    reflected by that of the object.
744    -->
745    <dt><dfn id=notations class=dom-attr><code>notations</code></dfn> of type
746    <code>notations</code>, read$B!>(Bonly</code>
747      <dd><p>A live <code>NamedNodeMap</code> object that contains all the
748      notations belonging to the <code>DocumentType</code> node.</p>
749      
750      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
751      same value as the <code>notations</code> attribute (defined in the
752      <code>DocumentType</code> interface) of the same node.</p>
753    
754      <div class="note memo">
755        <p>This attribute is part of the interface for historical reason.</p>
756        <p>Implementations are not required to implement the
757        <code>notations</code> attribute twice (for <code>DocumentType</code>
758        and <code>DocumentTypeDefinition</code> interfaces); they share exactly
759        same definition.</p>
760      </div></dd>
761    <!--
762    If the [CODE(DOMi)@en[[[DocumentTypeDefinition]]]] node is
763    created from an XML document, duplicate notation declarations, if any, in DTD
764    [['''MUST NOT''']] result in a node in the [CODE(DOMi)@en[[[NamedNodeMap]]]]
765    object and only the first declaration [['''MUST''']] be
766    made available as a [CODE(DOMi)@en[[[Notation]]]] node.
767    
768    ;; This definition is based on one for the
769    [CODE(DOMa)@en[[[notations]]]] attribute of the
770    [CODE(DOMi)@en[[[DocumentType]]]] interface in DOM XML module.
771    Since duplication is violation to the Validity Constraint,
772    XML parsers might vary on how notations are notified to
773    the application.  In particular, [CODE(InfoProp)@en[[[notations]]]]
774    property of the document information item in XML Information Set
775    is so defined that in case ''any'' notation is declared for
776    multiple times then the property has no value.
777    
778    The attribute [['''MUST''']] return the [CODE(DOMi)@en[[[NamedNodeMap]]]]
779    object that contains all the [CODE(DOMi)@en[[[Notation]]]] nodes
780    representing notations belong to the node.  The returned
781    [CODE(DOMi)@en[[[NamedNodeMap]]]] object [['''MUST''']] be read-only if and only if
782    the node is read-only. Note that the [CODE(DOMi)@en[[[NamedNodeMap]]]] object is live
783    and therefore any change of read-only flag on the node is immediately
784    reflected by that of the object.
785    -->
786    
787    <dt class=ed>@@ other members...
788    </dl>
789    
790    <div class=ed>
791    <p>A future version of this interface might define the
792    <code>parameterEntities</code> and getter/setter for parameter entities.
793    </div>
794    
795    </div>
796    
797    <div class=section id=section-elementtypedefinition>
798    <h3>The <code>ElementTypeDefinition</code> Interface</h3>
799    
800    <p>The nodes of type
801    <a href="#ELEMENT_TYPE_DEFINITION_NODE"><code>ELEMENT_TYPE_DEFINITION_NODE</code></a>
802    represents an element type definition.  Such a node implements the
803    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
804    interface, which extends the <a href="#Node"><code>Node</code></a>
805    interface.</p>
806    
807    <p>An element type definition represents a definition of the element type.
808    It is corresponding to the element type declaration in <abbr>DTD</abbr>.
809    However, an
810    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a> node
811    does not represent the element type definition in <abbr>DTD</abbr> itself.  
812    Even if there are more than one element type declarations for an element type
813    in <abbr>DTD</abbr>, the result <abbr>DOM</abbr> will contain only an
814    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
815    node for that element type.  In addition, if there are attribute definition
816    declarations for an element type, even when there is no element type
817    declaration for that element type, the <abbr>DOM</abbr> will contain an
818    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
819    node for that element type.</p>
820    
821    <p>The <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
822    interface <em class=rfc2119>MUST</em> be implemented as following:</p>
823    <pre class=idl><code>interface <dfn id=ElementTypeDefinition><code>ElementTypeDefinition</code></dfn> : <a href="#Node">Node</a> {
824      readonly attribute <a href="#ownerDocumentTypeDefinition">ownerDocumentTypeDefinition</a>;
825    
826      <span class=ed>@@ more</span>
827    }</code></pre>
828    
829    <pre class=ed>
830    [DFN@en[[CODE(DOMa)@en[[[ownerDocumentTypeDefinition]]]] attribute]]
831    of the [CODE(DOMi)@en[[[ElementTypeDefinition]]]]
832    interface is defined in [[manakai//DOM Extensions]>>50].</pre>
833    </div>
834    
835    <div class=section id=section-attributedefinition>
836    <h3>The <code>AttributeDefinition</code> Interface</h3>
837    
838    <p>The nodes of type
839    <a href="#ATTRIBUTE_DEFINITION_NODE"><code>ATTRIBUTE_DEFINITION_NODE</code></a>
840    represents an attribute definition.  Such a node implements the
841    <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> interface,
842    which extends the <a href="#Node"><code>Node</code></a> interface.</p>
843    
844    <p>An attribute definition represents a definition of the attribute
845    associated to an element type.  It is corresponding to the attribute definition
846    in the attribute list declaration in <abbr>DTD</abbr>.  However, an
847    <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node does
848    not represent the attribute definition in <abbr>DTD</abbr> itself.  Even if
849    there are more than one attribute definitions for an attribute of an element
850    type in <abbr>DTD</abbr>, the result <abbr>DOM</abbr> will contain only an
851    <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node for
852    that attribute.</p>
853    
854    <p>The <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
855    interface <em class=rfc2119>MUST</em> be implemented as following:</p>
856    <pre class=idl><code>interface <dfn id=AttributeDefinition><code>AttributeDefinition</code></dfn> : <a href="#Node">Node</a> {
857      <span class=comment>// <a href="#DeclaredValueType">DeclaredValueType</a></span>
858      const unsigned short <a href="#NO_TYPE_ATTR">NO_TYPE_ATTR</a> = 0;
859      const unsigned short <a href="#CDATA_ATTR">CDATA_ATTR</a> = 1;
860      const unsigned short <a href="#ID_ATTR">ID_ATTR</a> = 2;
861      const unsigned short <a href="#IDREF_ATTR">IDREF_ATTR</a> = 3;
862      const unsigned short <a href="#IDREFS_ATTR">IDREFS_ATTR</a> = 4;
863      const unsigned short <a href="#ENTITY_ATTR">ENTITY_ATTR</a> = 5;
864      const unsigned short <a href="#ENTITIES_ATTR">ENTITIES_ATTR</a> = 6;
865      const unsigned short <a href="#NMTOKEN_ATTR">NMTOKEN_ATTR</a> = 7;
866      const unsigned short <a href="#NMTOKENS_ATTR">NMTOKENS_ATTR</a> = 8;
867      const unsigned short <a href="#NOTATION_ATTR">NOTATION_ATTR</a> = 9;
868      const unsigned short <a href="#ENUMERATION_ATTR">ENUMERATION_ATTR</a> = 10;
869      const unsigned short <a href="#UNKNOWN_ATTR">UNKNOWN_ATTR</a> = 11;
870    
871      <span class=comment>// <a href="#DefaultValueType">DefaultValueType</a></span>
872      const unsigned short <a href="#UNKNOWN_DEFAULT">UNKNOWN_DEFAULT</a> = 0;
873      const unsigned short <a href="#FIXED_DEFAULT">FIXED_DEFAULT</a> = 1;
874      const unsigned short <a href="#REQUIRED_DEFAULT">REQUIRED_DEFAULT</a> = 2;
875      const unsigned short <a href="#IMPLIED_DEFAULT">IMPLIED_DEFAULT</a> = 3;
876      const unsigned short <a href="#EXPLICIT_DEFAULT">EXPLICIT_DEFAULT</a> = 4;
877      
878      readonly attribute <a href="#ElementTypeDefinition">ElementTypeDefinition</a> <a href="#ownerElementTypeDefinition">ownerElementTypeDefinition</a>;
879    
880      readonly attribute unsigned short <a href="#declaredType">declaredType</a>;
881      readonly attribute unsigned short <a href="#defaultType">defaultType</a>;
882    
883      <span class=ed>...</span>
884    }</code></pre>
885    
886    <dl>
887    <dt><dfn id=ownerElementTypeDefinition class=dom-attr><code>ownerElementTypeDefinition</code></dfn>
888    of type
889    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>,
890    read$B!>(Bonly</dt>
891      <dd><p>The
892      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a> to
893      which the <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
894      node belongs.</p>
895    
896      <p>On getting, the attribute <em class=rfc2119>MUST</em> return an
897      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a> node.
898      It <em class=rfc2119>MUST</em> be such a node that whose
899      <a href="#attributeDefinitons"><code>attributeDefinitions</code></a>
900      attribute contains the <code>NamedNodeMap</code> object that contains
901      the <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
902      node.  If there is no such an
903      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a> node,
904      then <code>null</code> <em class=rfc2119>MUST</em> be returned.</p>
905    <dt><dfn id=declaredType class=dom-attr><code>declaredType</code></dfn> of type
906    <code>unsigned short</code></dt>
907      <dd><p>The declared type <span class=ed>@@ ref</span> of the attribute.
908      It is expected that this attribute contains a value from the definition group
909      <a href="#DeclaredValueType"><code>DeclaredValueType</code></a>.</p>
910    
911      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
912      value associated to this attribute.</p>
913    
914      <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
915      <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
916      exception if the
917      <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node
918      is read$B!>(Bonly <span class=ed>@@ ref</span>.  Otherwise, it
919      <em class=rfc2119>MUST</em> set the specified value as the value
920      associated to this attribute.</p>
921    
922      <p>If the <code>AttributeDefinition</code> node is created during the process
923      to create a <abbr>DOM</abbr> from an <abbr>XML</abbr> document, an
924      appropriate value from the
925      <a href="#DeclaredValueType"><code>DeclaredValueType</code></a> constant
926      group <em class=rfc2119>MUST</em> be set to the attribute.</p>
927    
928      <!-- DeclaredValueType -->
929    <p>The definition group
930    <dfn id=DeclaredValueType><code>DeclaredValueType</code></dfn> contains
931    integers indicating the declared type of attributes.  The definition
932    group contains the following constants:</p>
933    
934    <table>
935    <thead>
936    <tr><th scope=col>Name<th scope=col>Value<th scope=col>Description</tr>
937    </thead>
938    <tbody>
939    <tr>
940    <th scope=row><dfn id=NO_TYPE_ATTR class=dom-const><code>NO_TYPE_ATTR</code>
941    <td><code>0</code><td>No value <span class=ed>[INFOSET]</span>.</tr>
942    <tr>
943    <th scope=row><dfn id=CDATA_ATTR class=dom-const><code>CDATA_ATTR</code>
944    <td><code>1</code><td><code>CDATA</code> <span class=ed>[XML]</span>.</tr>
945    <tr>
946    <th scope=row><dfn id=ID_ATTR class=dom-const><code>ID_ATTR</code>
947    <td><code>2</code><td><code>ID</code> <span class=ed>[XML]</span>.</tr>
948    <tr>
949    <th scope=row><dfn id=IDREF_ATTR class=dom-const><code>IDREF_ATTR</code>
950    <td><code>3</code><td><code>IDREF</code> <span class=ed>[XML]</span>.</tr>
951    <tr>
952    <th scope=row><dfn id=IDREFS_ATTR class=dom-const><code>IDREFS_ATTR</code>
953    <td><code>4</code><td><code>IDREFS</code> <span class=ed>[XML]</span>.</tr>
954    <tr>
955    <th scope=row><dfn id=ENTITY_ATTR class=dom-const><code>ENTITY_ATTR</code>
956    <td><code>5</code><td><code>ENTITY</code> <span class=ed>[XML]</span>.</tr>
957    <tr>
958    <th scope=row><dfn id=ENTITIES_ATTR class=dom-const><code>ENTITIES_ATTR</code>
959    <td><code>6</code><td><code>ENTITIES</code> <span class=ed>[XML]</span>.</tr>
960    <tr>
961    <th scope=row><dfn id=NMTOKEN_ATTR class=dom-const><code>NMTOKEN_ATTR</code>
962    <td><code>7</code><td><code>NMTOKEN</code> <span class=ed>[XML]</span>.</tr>
963    <tr>
964    <th scope=row><dfn id=NMTOKENS_ATTR class=dom-const><code>NMTOKENS_ATTR</code>
965    <td><code>8</code><td><code>NMTOKENS</code> <span class=ed>[XML]</span>.</tr>
966    <tr>
967    <th scope=row><dfn id=NOTATION_ATTR class=dom-const><code>NOTATION_ATTR</code>
968    <td><code>9</code><td><code>NOTATION</code> <span class=ed>[XML]</span>.</tr>
969    <tr>
970    <th scope=row><dfn id=ENUMERATION_ATTR class=dom-const><code>ENUMERATION_ATTR</code>
971    <td><code>10</code><td>Enumeration <span class=ed>[XML]</span>.</tr>
972    <tr>
973    <th scope=row><dfn id=UNKNOWN_ATTR class=dom-const><code>UNKNOWN_ATTR</code>
974    <td><code>11</code><td>Unknown, because no declaration for the attribute
975    has been read but the [all declaration processed] property
976    <span class=ed>[INFOSET]</span> would be false.</tr>
977    </tbody>
978    </table>
979    
980    <p>If no attribute type information is available, or if the source
981    of the information does not distinguish <q>no value</q> and <q>unknown</q>
982    <span class=ed>[INFOSET]</span>, then the value
983    <a href="#NO_TYPE_ATTR"><code>NO_TYPE_ATTR</code></a>
984    <em class=rfc2119>MUST</em> be used.</p>
985    
986    <div class="note memo">
987    <p>An <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node
988    created by the
989    <a href="#createAttributeDefinition"><code>createAttributeDefinition</code></a>
990    method has its <a href="#declaredType"><code>declaredType</code></a> attribute
991    set to <a href="#NO_TYPE_ATTR"><code>NO_TYPE_ATTR</code></a>.</p>
992    </div>
993    
994    <p>If the source of the information does not distinguish <q>no value</q>
995    and/or <q>unknown</q> <span class=ed>[INFOSET]</span> and
996    <code>CDATA</code> <span class=ed>[XML]</span>, then the value
997    <a href="#CDATA_ATTR"><code>CDATA_ATTR</code></a> <em class=rfc2119>MUST</em>
998    be used.</p>
999    
1000    <p>In Perl binding <span class=ed>[PERLBINDING]</span>, the
1001    <code>Attr</code> nodes <em class=rfc2119>MUST</em> implement the
1002    <a href="#DeclaredValueType"><code>DeclaredValueType</code></a>
1003    definition group.</p>
1004    
1005      </dd>
1006    <dt><dfn id=defaultType class=dom-attr><code>defaultType</code></dfn> of
1007    type <code>unsigned short</code></dt>
1008      <dd><p>The type of the default for the attribute.  It is expected that this
1009      attribute contains a value from the definition group
1010      <a href="#DefaultValueType"><code>DefaultValueType</code></a>.</p>
1011    
1012      <p>On getting, the attribute <em class=rfc2119>MUST</em> return
1013      the value associated to this attribute.</p>
1014    
1015      <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
1016      <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
1017      exception if the
1018      <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node
1019      is read$B!>(Bonly <span class=ed>@@ ref</span>.  Otherwise, it
1020      <em class=rfc2119>MUST</em> set the specified value as the value
1021      associated to this attribute.</p>
1022    
1023      <p>If the
1024      <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node is
1025      created during the process to create a <abbr>DOM</abbr> from an
1026      <abbr>XML</abbr> document, an appropriate value from the
1027      <a href="#DefaultValueType"><code>DefaultValueType</code></a> definition
1028      group <em class=rfc2119>MUST</em> be set to the attribute.</p>
1029    
1030      <!-- DefaultValueType -->
1031      <p>The definition group
1032      <dfn id=DefaultValueType><code>DefaultValueType</code></dfn>
1033      contains integers indicating the type of the default for the attribute.
1034      The definition group contains the following constans:</p>
1035    
1036      <table>
1037      <thead>
1038      <tr><th scope=col>Name<th scope=col>Value<th scope=col>Description</tr>
1039      </thead>
1040      <tbody>
1041      <tr>
1042      <th scope=row><dfn id=UNKNOWN_DEFAULT class=dom-const><code>UNKNOWN_DEFAULT</code></dfn>
1043      <td><code>0</code><td>Unknown.</tr>
1044      <tr>
1045      <th scope=row><dfn id=FIXED_DEFAULT class=dom-const><code>FIXED_DEFAULT</code></dfn>
1046      <td><code>1</code><td>Provided explicitly and fixed
1047      <span class=ed>@@ ref</span> to that value.</tr>
1048      <tr>
1049      <th scope=row><dfn id=REQUIRED_DEFAULT class=dom-const><code>REQUIRED_DEFAULT</code></dfn>
1050      <td><code>2</code><td>No default value and the attribute have to be
1051      explicitly specified.</tr>
1052      <tr>
1053      <th scope=row><dfn id=IMPLIED_DEFAULT class=dom-const><code>IMPLIED_DEFAULT</code></dfn>
1054      <td><code>3</code><td>Implied <span class=ed>@@ ref</span>.</tr>
1055      <tr>
1056      <th scope=row><dfn id=EXPLICIT_DEFAULT class=dom-const><code>EXPLICIT_DEFAULT</code></dfn>
1057      <td><code>4</code><td>Provided explicitly.</tr>
1058      </tbody>
1059      </table>
1060    
1061      <p>If the source of the default type does not distinguish
1062      implied and unknown default types, then the value
1063      <a href="#IMPLIED_DEFAULT"><code>IMPLIED_DEFAULT</code></a>
1064      <em class=rfc2119>MUST</em> be used.</p>
1065    
1066      <div class="note memo">
1067      <p>An <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
1068      node created by the
1069      <a href="#createAttributeDefinition"><code>createAttributeDefinition</code></a>
1070      method has its <a href="#defaultType"><code>defaultType</code></a>
1071      attribute set to
1072      <a href="#UNKNOWN_DEFAULT"><code>UNKNOWN_DEFAULT</code></a>.</p>
1073      </div></dd>
1074    </dl>
1075    
1076    </div>
1077    
1078  </div>  </div>
1079    
1080    
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