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revision 1.2 by wakaba, Sun Dec 2 04:25:43 2007 UTC revision 1.16 by wakaba, Tue Dec 4 10:44:09 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=2007-12-03>3 December 2007</time></h2>
14    
15  <dl class="versions-uri">  <dl class="versions-uri">
16  <dt>This Version</dt>  <dt>This Version</dt>
# Line 83  normative version.</p> Line 84  normative version.</p>
84  <p>This is a work-in-progress specification for DOM Document Type  <p>This is a work-in-progress specification for DOM Document Type
85  Definition module, as implemented by manakai and  Definition module, as implemented by manakai and
86  <a href="http://suika.fam.cx/gate/2005/sw/DOM%20XML%20Document%20Type%20Definition">partially documented in the SuikaWiki</a>.</p>  <a href="http://suika.fam.cx/gate/2005/sw/DOM%20XML%20Document%20Type%20Definition">partially documented in the SuikaWiki</a>.</p>
   
 <p>...</p>  
87  </div>  </div>
88    
89    <p>The <dfn id=term-dom-dtdef><abbr>DOM</abbr> Document Type Definition</dfn>
90    module is a set of <abbr>DOM</abbr> interfaces, including both new
91    interfaces and modifications to existing <abbr>DOM</abbr> interfaces,
92    over which <abbr>DOM</abbr> applications are able to access to the
93    definitions of the document type.</p>
94    
95    <p>Interfaces defined in this specification are partially modeled from
96    early drafts of <abbr>DOM</abbr> level 1 <span class=ed>@@ ref</span>,
97    <abbr>DOM</abbr> Abstract Schema level 3 <span class=ed>@@ ref</span>, and
98    <abbr>XML</abbr> Schema <abbr>API</abbr>, but are not compatible with
99    any of them as a whole.</p>
100  </div>  </div>
101    
102  <div class="section" id="terminology">  <div class="section" id="terminology">
# Line 110  else in this specification is normative. Line 120  else in this specification is normative.
120  <p><span class=ed>Algorithm is normative but non-normative</span>.  <p><span class=ed>Algorithm is normative but non-normative</span>.
121  In addition, the order in which <a href="#errors">errors</a> are  In addition, the order in which <a href="#errors">errors</a> are
122  raised is undefined.</p>  raised is undefined.</p>
123    
124    <p class=ed><var>A</var> object is an object implementing <var>A</var>
125    interface.</p>
126    
127    <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    </div>
133    
134    <div class=section id=dom-dtdef>
135    <h2><abbr>DOM</abbr> Document Type Definition Module</h2>
136    
137    <p>The <abbr>DOM</abbr> Document Type Definition module, version 3.0,
138    consists of three interfaces:</p>
139    <ul>
140    <li><a href="#DocumentXDoctype"><code>DocumentXDoctype</code></a></li>
141    <li><a href="#DocumentTypeDefinition"><code>DocumentTypeDefinition</code></a></li>
142    <li><a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a></li>
143    <li><a href="#AttributeDefinition"><code>AttributeDefinition</code></a></li>
144    </ul>
145    
146    <p>In addition, it modifies interfaces
147    <a href="#Node"><code>Node</code></a>,
148    <a href="#DocumentType"><code>DocumentType</code></a>,
149    <a href="#Entity"><code>Entity</code></a>,
150    <a href="#EntityReference"><code>EntityReference</code></a>,
151    <a href="#Notation"><code>Notation</code></a>, and
152    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a>.</p>
153    
154    <div class=section id=features>
155    <h3>Feature Name</h3>
156    
157    <p>In a <abbr>DOM</abbr> implementation that supports the version 3.0 of
158    the <abbr>DOM</abbr> Document Type Definition module, the
159    <code>hasFeature</code> method of a <code>DOMImplementation</code> object
160    <em class=rfc2119>MUST</em> return <code>true</code> when the parameters are
161    set to <code>http://suika.fam.cx/www/2006/feature/XDoctype</code> and
162    <code>3.0</code> respectively.</p>
163    
164    <p>In such an implementation, the <code>getFeature</code> method of a
165    <code>Document</code> object <em class=rfc2119>MUST</em> return the (at least
166    conceptually) same object implementing the
167    <a href="#DocumentXDoctype"><code>DocumentXDoctype</code></a> interface when
168    the parameters are set to
169    <code>http://suika.fam.cx/www/2006/feature/XDoctype</code> and
170    <code>3.0</code> respectively.  Likewise, any method that takes one or more
171    feature names with or without version number, including the methods
172    <code>hasFeature</code> and <code>getFeature</code>,
173    <em class=rfc2119>MUST</em> behave in a manner consistent with the
174    aforementioned cases.</p>
175    </div>
176    
177    <div class=section id=section-node>
178    <h3>Modifications to the <code id=Node>Node</code> Interface</h3>
179    
180    <p>The implementation of the
181    <a href="#Node"><code>Node</code></a> interface
182    <em class=rfc2119>MUST</em> be modified as following:</p>
183    <pre class=idl><code>// Additions to the Node interface
184    
185    // Additions to the NodeType definition group
186    const unsigned short <a href="#ELEMENT_TYPE_DEFINITION_NODE">ELEMENT_TYPE_DEFINITION_NODE</a> = 81001;
187    const unsigned short <a href="#ATTRIBUTE_DEFINITION_NODE">ATTRIBUTE_DEFINITION_NODE</a> = 81002;
188    </pre>
189    
190    <p>This specification adds two new types (subinterfaces) of
191    <a href="#Node"><code>Node</code></a>: element type definition (node type
192    <a href="#ELEMENT_TYPE_DEFINITION_NODE"><code>ELEMENT_TYPE_DEFINITION_NODE</code></a>,
193    interface
194    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>) and
195    attribute definition (node type
196    <a href="#ATTRIBUTE_DEFINITION_NODE"><code>ATTRIBUTE_DEFINITION_NODE</code></a>,
197    interface
198    <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>).  For
199    these kinds of nodes, methods and attributes in the
200    <a href="#Node"><code>Node</code></a> interface must behave as following:</p>
201    
202    <dl>
203    <dt><code id=attributes>attributes</code></dt>
204      <dd>
205        <p>On getting, the attribute <em class=rfc2119>MUST</em> return
206        <code>null</code>.</p>
207      </dd>
208    <dt><code id=baseURI>baseURI</code></dt>
209      <dd>
210        <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
211        value of the <a href="#baseURI"><code>baseURI</code></a> attribute
212        of the node in the <code>ownerDocument</code> attribute of the node.
213        Note that the value might be <code>null</code>.</p>
214      </dd>
215    <dt><code id=nodeName>nodeName</code></dt>
216      <dd>
217        <p>If the node is an
218        <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>:
219        On getting, the attribute <em class=rfc2119>MUST</em> return the
220        name of the element type definition represented by the node.</p>
221    
222        <p>If the node is an
223        <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>:
224        On getting, the attribute <em class=rfc2119>MUST</em> return the
225        name of the attribute definition represented by the node.</p>
226      </dd>
227    <dt><code id=nodeType>nodeType</code></dt>
228      <dd>
229        <p>On getting, the attribute <em class=rfc2119>MUST</em> return
230        <a href="#ELEMENT_TYPE_DEFINITION_NODE"><code>ELEMENT_TYPE_DEFINITION_NODE</code></a>
231        (if the node is an
232        <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>) or
233        <a href="#ATTRIBUTE_DEFINITION_NODE"><code>ATTRIBUTE_DEFINITION_NODE</code></a>
234        (if the node is an
235        <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>).</p>
236    
237        <!-- NodeType -->
238    <p>Two constants are added to the <code id=NodeType>NodeType</code>
239    definition group of the <a href="#Node"><code>Node</code></a> interface as
240    following:</p>
241    <table>
242    <thead>
243    <tr><th scope=col>Name<th scope=col>Value<th scope=col>Description</tr>
244    </thead>
245    <tbody>
246    <tr>
247    <th scope=row><dfn id=ELEMENT_TYPE_DEFINITION_NODE class=dom-const><code>ELEMENT_TYPE_DEFINITION_NODE</code></dfn>
248    <td><code>81001</code><td>The node is an
249    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>.</tr>
250    <tr>
251    <th scope=row><dfn id=ATTRIBUTE_DEFINITION_NODE class=dom-const><code>ATTRIBUTE_DEFINITION_NODE</code></dfn>
252    <td><code>81002</code><td>The node is an
253    <a href="#ElementTypeDefinition"><code>AttributeDefinition</code></a>.</tr>
254    </tbody>
255    </table>
256      </dd>
257    <dt><code id=nodeValue>nodeValue</code> and
258    <code id=textContent>textContent</code></dt>
259      <dd>
260        <p>If the node is an
261        <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>:
262        On getting, the attributes <em class=rfc2119>MUST</em> return the
263        name of the element type.</p>
264    
265        <div class="note memo">
266          <p>Thus, on setting the attributes does nothing
267          <span class=ed>[DOM3]</span>.</p>
268        </div>
269    
270        <p>On setting, the <a href="#textContent"><code>textContent</code></a>
271        attribute <em class=rfc2119>MUST NOT</em> raise a
272        <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>.
273        <span class=ed>@@ I forgot why this requirement is necessary.</span></p>
274    
275        <p>If the node is an
276        <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>:</p>
277    
278        <pre class=ed>
279    The getter of the [CODE(DOMa)@en[[[nodeValue]]]] attribute
280    of an [CODE(DOMi)@en[[[AttributeDefinition]]]] object
281    [['''MUST''']] return the normalized default value
282    of the attribute.
283    
284    @@
285    
286    [4] The getter of the [CODE(DOMa)@en[[[textContent]]]]
287    attribute of an [CODE(DOMi)@en[[[AttributeDefinition]]]]
288    object [['''MUST''']] behave as if it were an
289    [CODE(DOMi)@en[[[Attr]]]] object.
290    
291    The setter of the [CODE(DOMa)@en[[[textContent]]]] attribute
292    of an [CODE(DOMi)@en[[[AttributeDefinition]]]] object
293    [['''MUST''']] behave as if the following algorithm
294    is performed:
295    = If the [CODE(DOMi)@en[[[AttributeDefinition]]]]
296    object is read-only, then throw an
297    [CODE(DOMc)@en[[[NO_MODIFICATION_ALLOWED_ERR]]]].
298    = Remove any child node the node has.
299    = If the new value is not empty and not [CODE(IDL)@en[[[null]]]],
300    then create a [CODE(DOMi)@en[[[Text]]]] node
301    whose [CODE(DOMa)@en[[[data]]]] is the new value
302    and append it to the [CODE(DOMi)@en[[[AttributeDefinition]]]].
303    </pre>
304      </dd>
305    <dt class=ed>@@ ...</dt>
306    </dl>
307    
308    </div>
309    
310    <div class=section id=section-documentxdoctype>
311    <h3>The <code>DocumentXDoctype</code> Interface</h3>
312    
313    <p>The <a href="#DocumentXDoctype"><code>DocumentXDoctype</code></a> interface
314    <em class=rfc2119>MUST</em> be implemented as following:</p>
315    <pre class=idl><code>interface <dfn id=DocumentXDoctype><code>DocumentXDoctype</code></dfn> {
316      DocumentType <a href="#createDocumentTypeDefinition">createDocumentTypeDefinition</a>
317        (in DOMString <a href="#createDocumentTypeDefinition-name"><var>name</var></a>)
318        raises (DOMException);
319      <a href="#ElementTypeDefinition">ElementTypeDefinition</a> <a href="#createElementTypeDefinition">createElementTypeDefinition</a>
320        (in DOMString <a href="#createElementTypeDefinition-name"><var>name</var></a>)
321        raises (DOMException);
322      <a href="#AttributeDefinition">AttributeDefinition</a> <a href="#createAttributeDefinition">createAttributeDefinition</a>
323        (in DOMString <a href="#createAttributeDefinition-name"><var>name</var></a>)
324        raises (DOMException);
325      <a href="#Entity">Entity</a> <a href="#createGeneralEntity">createGeneralEntityDefinition</a>
326        (in DOMString <a href="#createGeneralEntity-name"><var>name</var></a>)
327        raises (DOMException);
328      <a href="#Notation">Notation</a> <a href="#createNotation">createNotation</a>
329        (in DOMString <a href="#createNotation-name"><var>name</var></a>)
330        raises (DOMException);
331    }</code></pre>
332    
333    <div class=ed>@@ cast definition</div>
334    
335    <dl>
336    <dt><dfn id=createDocumentTypeDefinition class=dom-method><code>createDocumentTypeDefinition</code></dfn>,
337    method</dt>
338      <dd>
339        <p>This method creates a <code>DocumentType</code> node with the specified
340        name, belonging to the document.</p>
341        <p>The <dfn id=createDocumentTypeDefinition-name class=dom-param><var>name</var></dfn>
342        parameter is the name of the document type.</p>
343    
344        <p>When invoked, the method <em class=rfc2119>MUST</em> create and
345        return a <code>DocumentType</code> node with the following attributes:</p>
346        <dl>
347        <dt><code>attributes</code>, <code>parentNode</code></dt>
348          <dd><code>null</code>.</dd>
349        <dt><code>elementTypes</code>, <code>generalEntities</code>, and
350        <code>notations</code></dt>
351          <dd>Empty <code>NamedNodeMap</code> objects.</dd>
352        <dt><code>entities</code></dt>
353          <dd>The same value as the <code>generalEntities</code> attribute.</dd>
354        <dt><code>childNodes</code></dt>
355          <dd>An empty <code>NodeList</code> object.</dd>
356        <dt><code>internalSubset</code>, <code>publicId</code>, and
357        <code>systemId</code></dt>
358          <dd>Empty strings.</dd>
359        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
360          <dd><code>false</code>.</dd>
361        <dt><code>nodeName</code></dt>
362          <dd><a href="#createDocumentTypeDefinition-name"><var>name</var></a>.</dd>
363        <dt><code>ownerDocument</code></dt>
364          <dd>The <code>Document</code> over which the method is invoked.</dd>
365        </dl>
366        <p>In addition, the method <em class=rfc2119>MUST</em> be marked as
367        containing five general entity declarations: <code>amp</code>,
368        <code>lt</code>, <code>gt</code>, <code>quot</code>, and
369        <code>apos</code>.</p>
370      </dd>
371    <dt><dfn id=createElementTypeDefinition class=dom-method><code>createElementTypeDefinition</code></dfn>,
372    method</dt>
373      <dd>
374        <p>This method creates a <code>ElementTypeDefinition</code> node with the
375        specified name, belonging to the document.</p>
376        <p>The <dfn id=createElementTypeDefinition-name class=dom-param><var>name</var></dfn>
377        parameter is the name of the element type defined by the element
378        type definition.</p>
379    
380        <p>When invoked, the method <em class=rfc2119>MUST</em> create and
381        return an
382        <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
383        node with the following attributes:</p>
384        <dl>
385        <dt><a href="#attributeDefinitions"><code>attributeDefinitions</code></a></dt>
386          <dd>An empty <code>NamedNodeMap</code> object.</dd>
387        <dt><code>attributes</code>, <code>parentNode</code></dt>
388          <dd><code>null</code>.</dd>
389        <dt><code>childNodes</code></dt>
390          <dd>An empty <code>NodeList</code> object.</dd>
391        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
392          <dd><code>false</code>.</dd>
393        <dt><code>nodeName</code></dt>
394          <dd><a href="#createElementTypeDefinition-name"><var>name</var></a>.</dd>
395        <dt><code>ownerDocument</code></dt>
396          <dd>The <code>Document</code> node over which the method is invoked.</dd>
397        <dt><a href="#ownerDocumentTypeDefinition"><code>ownerDocumentTypeDefinition</code></a></dt>
398          <dd><code>null</code>.</dd>
399        <dt class=ed>@@ Ensure all attributes are defined</dt>
400        </dl>
401      </dd>
402    <dt><dfn id=createAttributeDefinition class=dom-method><code>createAttributeDefinition</code></dfn>,
403    method</dt>
404      <dd>
405        <p>This method creates a <code>AttributeDefinition</code> node with the
406        specified name, belonging to the document.</p>
407        <p>The <dfn id=createAttributeDefinition-name class=dom-param><var>name</var></dfn>
408        parameter is the name of the attribute defined by the attribute
409        definition.</p>
410    
411        <p>When invoked, the method <em class=rfc2119>MUST</em> create and
412        return an
413        <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
414        node with the following attributes:</p>
415        <dl>
416        <dt><code>allowedTokens</code></dt>
417          <dd>An empty <code>DOMStringList</code> object.</dd>
418        <dt><code>attributes</code>,
419        <a href="#ownerElementTypeDefinition"><code>ownerElementTypeDefinition</code></a>,
420        and <code>parentNode</code></dt>
421          <dd><code>null</code>.</dd>
422        <dt><code>childNodes</code></dt>
423          <dd>An empty <code>NodeList</code> object.</dd>
424        <dt><code>declaredType</code></dt>
425          <dd><a href="#NO_TYPE_ATTR"><code>NO_TYPE_ATTR</code></a>.</dd>
426        <dt><code>defaultType</code></dt>
427          <dd><a href="#UNKNOWN_DEFAULT"><code>UNKNOWN_DEFAULT</code></a>.</dd>
428        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
429          <dd><code>false</code>.</dd>
430        <dt><code>nodeName</code></dt>
431          <dd><a href="#createAttributeDefinition-name"><var>name</var></a>.</dd>
432        <dt><code>ownerDocument</code></dt>
433          <dd>The <code>Document</code> node over which the method is invoked.</dd>
434        <dt class=ed>@@ Ensure all attributes are defined</dt>
435        </dl>
436    
437        <div class=ed>
438        <p>@@ Should we keep these statements?:
439    However, if the &lt;cfg::cfg|xml-id> configuration
440    parameter is set to <code>true</code> and the <var>name</var>
441    is <code>xml:id</code>, then the [CODE(DOMa)@en[[[declaredType]]]]
442    attribute is set to <code>ID_ATTR</code>.
443    [CODE(DOMa)@en[[[defaultType]]]]?</p>
444        </div>
445      </dd>
446    <dt><dfn id=createGeneralEntity class=dom-method><code>createGeneralEntity</code></dfn>,
447    method</dt>
448      <dd>
449        <p>This method creates a <a href="#Entity"><code>Entity</code></a> node
450        with the specified name, which represents a general entity, belonging to
451        the document.</p>
452        <p>The <dfn id=createGeneralEntity-name class=dom-param><var>name</var></dfn>
453        parameter is the name of the general entity.</p>
454    
455        <p>When invoked, the method <em class=rfc2119>MUST</em> create and return
456        an <a href="#Entity"><code>Entity</code></a> node with the following
457        attributes:</p>
458        <dl>
459        <dt><code>attributes</code>, <code>notationName</code>,
460        <a href="#ownerDocumentTypeDefinition"><code>ownerDocumentTypeDefinition</code></a>,
461        and <code>parentNode</code></dt>
462          <dd><code>null</code>.</dd>
463        <dt><code>childNodes</code></dt>
464          <dd>An empty <code>NodeList</code> object.</dd>
465        <dt><code>manakaiDeclarationBaseURI</code>,
466        <code>manakaiEntityBaseURI</code>, and
467        <code>manakaiEntityURI</code> <span class=ed>@@ ref</span></dt>
468          <dd>No explicit value is set.</dd>
469        <dt><code>manakaiHasReplacementTree</code> and
470        <code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
471          <dd><code>false</code>.</dd>
472        <dt><code>nodeName</code></dt>
473          <dd><a href="#createGeneralEntity-name"><var>name</var></a>.</dd>
474          <dd>
475            <div class="note memo">
476              <p>It is not an error for
477              <a href="#createGeneralEntity-name"><var>name</var></a> matching
478              to the name of one of predefined general parsed entities in
479              <abbr>XML</abbr> or <abbr>HTML</abbr>.  For example,
480              <a href="#createGeneralEntity-name"><var>name</var></a> might be
481              <code>amp</code>, resulting in an
482              <a href="#Entity"><code>Entity</code></a> node
483              with its <code>nodeName</code> attribute set to <code>amp</code>.</p>
484            </div>
485          </dd>
486        <dt><code>ownerDocument</code></dt>
487          <dd>The <code>Document</code> node over which the method is invoked.</dd>
488        <dt><code>publicId</code>, and <code>systemId</code></dt>
489          <dd><code>null</code>.</dd>
490          <dd class=ed>@@ publicId and systemId should be empty string?</dd>
491        <dt class=ed>@@ Ensure all attributes are defined</dd>
492        </dl>
493      </dd>
494    <dt><dfn id=createNotation class=dom-method><code>createNotation</code></dfn>,
495    method</dt>
496      <dd>
497        <p>This method creates a <code>Notation</code> node with the
498        specified name, belonging to the document.</p>
499        <p>The <dfn id=createNotation-name class=dom-param><var>name</var></dfn>
500        parameter is the name of the notation.</p>
501    
502        <p>When invoked, the method <em class=rfc2119>MUST</em> create and return
503        a <code>Notation</code> node with the following attributes:</p>
504        <dl>
505        <dt><code>attributes</code>,
506        <a href="#ownerDocumentTypeDefinition"><code>ownerDocumentTypeDefinition</code></a>,
507        and <code>parentNode</code></dt>
508          <dd><code>null</code>.</dd>
509        <dt><code>childNodes</code></dt>
510          <dd>An empty <code>NodeList</code> object.</dd>
511        <dt><code>manakaiDeclarationBaseURI</code></dt>
512          <dd>No explicit value is set.</dd>
513        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
514          <dd><code>false</code>.</dd>
515        <dt><code>nodeName</code></dt>
516          <dd><a href="#createNotation-name"><var>name</var></a>.</dd>
517        <dt><code>ownerDocument</code></dt>
518          <dd>The <code>Document</code> node over which the method is invoked.</dd>
519        <dt><code>publicId</code> and <code>systemId</code></dt>
520          <dd><code>null</code>.</dd>
521          <dd class=ed>@@ publicId and systemId should be empty string?</dd>
522        <dt class=ed>@@ Ensure all attributes are defined</dt>
523        </dl>
524      </dd>
525    </dl>
526    
527    <p>These methods <em class=rfc2119>MUST</em> raise an
528    <code>INVALID_CHARACTER_ERR</code> exception <span class=ed>@@ ref</span>
529    if <var>name</var> is <em>not</em> a legal <code>Name</code> according to
530    the <abbr>XML</abbr> version in use, as specified in the
531    <code>xmlVersion</code> attribute of the <code>Document</code> node.</p>
532    
533    <div class="note memo">
534    <p>Non$B!>(B<abbr>XML</abbr> case is intentionally left unspecified for now,
535    since <abbr>DOM3</abbr> specification <span class=ed>@@ ref</span> does not
536    define it for <code>Document</code> methods.</p>
537    
538    <p><var>name</var> does not have to be a namespace qualified name.</p>
539    </div>
540    
541    </div>
542    
543    
544    <div class=section id=section-documenttype>
545    <h3>Modifications to the <code id=DocumentType>DocumentType</code>
546    Interface</h3>
547    
548    <p>A <a href="#DocumentType"><code>DocumentType</code></a> interface
549    <em class=rfc2119>MAY</em> contain zero or more
550    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a>
551    nodes in the <code>NodeList</code> object contained in the
552    <code>childNodes</code> attribute of the
553    <a href="#DocumentType"><code>DocumentType</code></a> node.</p>
554    
555    <p>If the <a href="#DocumentType"><code>DocumentType</code></a> node is created
556    during the process to create a <abbr>DOM</abbr> from an <abbr>XML</abbr>
557    document, the <code>NodeList</code> object in the <code>childNodes</code>
558    object <em class=rfc2119>MUST</em> contains the
559    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a>
560    nodes representing the processing instructions in the document type
561    definition of the document processed <span class=ed>@@ ref</span> by
562    the <abbr>XML</abbr> processor.  If the
563    <a href="#DocumentType"><code>DocumentType</code></a> node is marked
564    as read$B!>(Bonly, then all the child nodes <em class=rfc2119>MUST</em>
565    also be marked as read$B!>(Bonly.</p>
566    
567    <p>If a <a href="#DocumentType"><code>DocumentType</code></a> node is created
568    from a document type declaration information item <span class=ed>@@ ref</span>,
569    the <code>NodeList</code> object in the <code>childNodes</code> attribute
570    of the node <em class=rfc2119>MUST</em> contain the
571    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a> nodes
572    created from the processing instruction information items in the list in the
573    [children] property of the document type declaration item in the same
574    order.</p>
575    
576    <p>If a <a href="#DocumentType"><code>DocumentType</code></a> node is mapped to
577    a document type declaration information item, the list in the [children]
578    property <em class=rfc2119>MUST</em> contain the processng instruction
579    information items created from the
580    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a> nodes
581    in the <code>NodeList</code> object in the <code>childNodes</code> attribute
582    of the <a href="#DocumentType"><code>DocumentType</code></a> node.</p>
583    
584    <p>The implementation of the
585    <a href="#DocumentType"><code>DocumentType</code></a> interface
586    <em class=rfc2119>MUST</em> be modified as following:</p>
587    <pre class=idl><code>// Modifications to the DocumentType interface
588      attribute DOMString <a href="#publicId">publicId</a>;
589      attribute DOMString <a href="#systemId">systemId</a>;
590    
591      attribute DOMString <a href="#internalSubset">internalSubset</a>;
592    </code></pre>
593    
594    <p>The <code id=publicId>publicId</code> attribute and the
595    <code id=systemId>systemId</code> attribute of
596    <a href="#DocumentType"><code>DocumentType</code></a>,
597    <a href="#Entity"><code>Entity</code></a>, and
598    <a href="#Notation"><code>Notation</code></a> interfaces are no longer
599    read$B!>(Bonly.</p>
600    
601    <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
602    <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
603    exception if the node is read$B!>(Bonly <span class=ed>@@ ref</span>.  
604    Otherwise, it <em class=rfc2119>MUST</em> set the specified value as the value
605    associated to the attribute.  No normalization, relative reference resolution,
606    or lexical validation is performed. <span class=ed>@@ If the new
607    value is <code>null</code>, ...</span></p>
608    
609    <div class="note memo">
610    <p>Setting an invalid identifier might make the node unserializable.
611    Setting a public identifier while leaveing system identifier unspecified
612    would also make the <a href="#DocumentType"><code>DocumentType</code></a>
613    or <a href="#Entity"><code>Entity</code></a> node unserializable.</p>
614    </div>
615    
616    <div class=ed>
617    <p>ISSUE: In HTML5, Firefox 1.5, and Opera 9, not specifying public or system identifier results in empty strings.</p>
618  </div>  </div>
619    
620    <p>The <code id=internalSubset>internalSubset</code> attribute of the
621    <a href="#DocumentType"><code>DocumentType</code></a> interface is no longer
622    read$B!>(Bonly.</p>
623    
624    <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
625    <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
626    exception if the node is read$B!>(Bonly <span class=ed>@@ ref</span>.  
627    Otherwise, it <em class=rfc2119>MUST</em> set the specified value as the value
628    associated to the attribute.  No normalization, or lexical validation is
629    performed. <span class=ed>@@ If the new value is <code>null</code>,
630    ...</span></p>
631    
632    </div>
633    
634    <div class=section id=section-documenttypedefinition>
635    <h3>The <code>DocumentTypeDefinition</code> Interface</h3>
636    
637    <p>The
638    <a href="#DocumentTypeDefinition"><code>DocumentTypeDefinition</code></a>
639    interface <em class=rfc2119>MUST</em> be implemented as following:</p>
640    <pre class=idl><code>interface <dfn id=DocumentTypeDefinition><code>DocumentTypeDefinition</code></dfn> {
641      readonly attribute NamedNodeMap <a href="#elementTypes">elementTypes</a>;
642      readonly attribute NamedNodeMap <a href="#generalEntities">generalEntities</a>;
643      readonly attribute NamedNodeMap <a href="#notations">notations</a>;
644    
645      <a href="#ElementTypeDefinition">ElementTypeDefinition</a> <a href="#getElementTypeDefinitionNode">getElementTypeDefinitionNode</a>
646        (in DOMString <a href="#getElementTypeDefinitionNode-name"><var>name</var></a>);
647      <a href="#Entity">Entity</a> <a href="#getGeneralEntityNode">getGeneralEntityNode</a>
648        (in DOMString <a href="#getGeneralEntityNode-name"><var>name</var></a>);
649      <a href="#Notation">Notation</a> <a href="#getNotationNode">getNotationNode</a>
650        (in DOMString <a href="#getNotationNode-name"><var>name</var></a>);
651    
652      void <a href="#setElementTypeDefinitionNode">setElementTypeDefinitionNode</a>
653        (in DOMString <a href="#setElementTypeDefinitionNode-node"><var>node</var></a>)
654        raises (DOMException);
655      void <a href="#setGeneralEntityNode">setGeneralEntityNode</a>
656        (in DOMString <a href="#setGeneralEntityNode-node"><var>node</var></a>)
657        raises (DOMException);
658      void <a href="#setNotationNode">setNotationNode</a>
659        (in DOMString <a href="#setNotationNode-node"><var>node</var></a>)
660        raises (DOMException);
661    }</code></pre>
662    
663    <pre class=ed>
664    [1] In an implementation that supports the
665    [CODE(URI)@en[[[http://suika.fam.cx/www/2006/feature/XDoctype]]]]
666    feature, a [CODE(DOMi)@en[[[DocumentType]]]] node
667    must implement the [CODE(DOMi)@en[[[DocumentTypeDefinition]]]]
668    interface.  See [[DOM XML Document Type Definition]>>3] for
669    details.
670    </pre>
671    
672    <dl>
673    <dt><dfn id=elementTypes class=dom-attr><code>elementTypes</code></dfn> of
674    type <code>NamedNodeMap</code>, read$B!>(Bonly</dt>
675      <dd><p>A live <code>NamedNodeMap</code> object that contains all the element
676      type definitions belonging to the <code>DocumentType</code> node.</p>
677    
678      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
679      <code>NamedNodeMap</code> object that contains all the
680      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
681      nodes belonging to the <code>DocumentType</code> node.  The
682      <code>NamedNodeMap</code> object <em class=rfc2119>MUST</em> be read$B!>(Bonly
683      if and only if the node is read$B!>(Bonly.  The <code>NamedNodeMap</code>
684      object <em class=rfc2119>MUST</em> be live and the same object
685      <em class=rfc2119>MUST</em> be returned for any invocation.</p>
686    
687      <p>If the <code>DocumentType</code> node is created during the process
688      to create a <abbr>DOM</abbr> from an <abbr>XML</abbr> document, the following
689      requirements are applied:  The <code>NamedNodeMap</code> object in the
690      <a href="#elementTypes"><code>elementType</code></a> attribute
691      <em class=rfc2119>MUST</em> be so transformed that the object contains
692      the <code>ElementTypeDefinition</code> nodes for the element types
693      whose name is presented as the <code>Name</code> of the element type or
694      attribute definition list declarations processed by the <abbr>XML</abbr>
695      processor.  If there is more than one element type declarations for an
696      element type, then the declarations other than the first one
697      <em class=rfc2119>MUST</em> be ignored for the purpose of constructing the
698      <code>NamedNodeMap</code> object.</p></dd>
699    <dt><dfn id=generalEntities class=dom-attr><code>generalEntities</code></dfn>
700    of type <code>NamedNodeMap</code>, read$B!>(Bonly</dt>
701      <dd><p>A live <code>NamedNodeMap</code> object that contains all the general
702      entities belonging to the <code>DocumentType</code> node.</p>
703      
704      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
705      same value as the <code>entities</code> attribute (defined in the
706      <code>DocumentType</code> interface) of the same node.</p>
707    
708      <div class="note memo">
709        <p>This attribute is part of the interface for historical reason.</p>
710      </div></dd>
711    <!--
712    All entities declared in the document type definition
713    contained in or referenced from the document entity
714    might not be exposed through this collection, depending
715    on the information provided by the XML processor for
716    the DOM implementation.  In particular, it might not
717    contain any entity if entity references are expanded
718    at the parse time.  An implementation [['''MUST NOT''']]
719    expose an [CODE(DOMi)@en[[[Entity]]]] node whose [CODE(DOMa)@en[[[nodeName]]]]
720    is equal to the name of one of five predefined general entities in
721    XML through the collection as the result of parsing of an XML
722    document that has no error.  Duplicate entity declarations are also discarded.
723    
724    The attribute [['''MUST''']] return the [CODE(DOMi)@en[[[NamedNodeMap]]]]
725    object that contains all the [CODE(DOMi)@en[[[Entity]]]] nodes
726    representing general entities belong to the node.  The returned
727    [CODE(DOMi)@en[[[NamedNodeMap]]]] object [['''MUST''']] be read-only if and only if
728    the node is read-only. Note that the [CODE(DOMi)@en[[[NamedNodeMap]]]] object is live
729    and therefore any change of read-only flag on the node is immediately
730    reflected by that of the object.
731    -->
732    <dt><dfn id=notations class=dom-attr><code>notations</code></dfn> of type
733    <code>notations</code>, read$B!>(Bonly</code>
734      <dd><p>A live <code>NamedNodeMap</code> object that contains all the
735      notations belonging to the <code>DocumentType</code> node.</p>
736      
737      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
738      same value as the <code>notations</code> attribute (defined in the
739      <code>DocumentType</code> interface) of the same node.</p>
740    
741      <div class="note memo">
742        <p>This attribute is part of the interface for historical reason.</p>
743        <p>Implementations are not required to implement the
744        <code>notations</code> attribute twice (for <code>DocumentType</code>
745        and <code>DocumentTypeDefinition</code> interfaces); they share exactly
746        same definition.</p>
747      </div></dd>
748    <!--
749    If the [CODE(DOMi)@en[[[DocumentTypeDefinition]]]] node is
750    created from an XML document, duplicate notation declarations, if any, in DTD
751    [['''MUST NOT''']] result in a node in the [CODE(DOMi)@en[[[NamedNodeMap]]]]
752    object and only the first declaration [['''MUST''']] be
753    made available as a [CODE(DOMi)@en[[[Notation]]]] node.
754    
755    ;; This definition is based on one for the
756    [CODE(DOMa)@en[[[notations]]]] attribute of the
757    [CODE(DOMi)@en[[[DocumentType]]]] interface in DOM XML module.
758    Since duplication is violation to the Validity Constraint,
759    XML parsers might vary on how notations are notified to
760    the application.  In particular, [CODE(InfoProp)@en[[[notations]]]]
761    property of the document information item in XML Information Set
762    is so defined that in case ''any'' notation is declared for
763    multiple times then the property has no value.
764    
765    The attribute [['''MUST''']] return the [CODE(DOMi)@en[[[NamedNodeMap]]]]
766    object that contains all the [CODE(DOMi)@en[[[Notation]]]] nodes
767    representing notations belong to the node.  The returned
768    [CODE(DOMi)@en[[[NamedNodeMap]]]] object [['''MUST''']] be read-only if and only if
769    the node is read-only. Note that the [CODE(DOMi)@en[[[NamedNodeMap]]]] object is live
770    and therefore any change of read-only flag on the node is immediately
771    reflected by that of the object.
772    -->
773    
774    <dt class=ed>@@ other members...
775    </dl>
776    
777    <div class=ed>
778    <p>A future version of this interface might define the
779    <code>parameterEntities</code> and getter/setter for parameter entities.
780    </div>
781    
782    </div>
783    
784    <div class=section id=section-elementtypedefinition>
785    <h3>The <code>ElementTypeDefinition</code> Interface</h3>
786    
787    <p>The <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
788    interface <em class=rfc2119>MUST</em> be implemented as following:</p>
789    <pre class=idl><code>interface <dfn id=ElementTypeDefinition><code>ElementTypeDefinition</code></dfn> : <a href="#Node">Node</a> {
790      readonly attribute <a href="#ownerDocumentTypeDefinition">ownerDocumentTypeDefinition</a>;
791    
792      <span class=ed>@@ more</span>
793    }</code></pre>
794    
795    <pre class=ed>
796    [DFN@en[[CODE(DOMa)@en[[[ownerDocumentTypeDefinition]]]] attribute]]
797    of the [CODE(DOMi)@en[[[ElementTypeDefinition]]]]
798    interface is defined in [[manakai//DOM Extensions]>>50].</pre>
799    </div>
800    
801    <div class=section id=section-attributedefinition>
802    <h3>The <code>AttributeDefinition</code> Interface</h3>
803    
804    <p>The <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
805    interface <em class=rfc2119>MUST</em> be implemented as following:</p>
806    <pre class=idl><code>interface <dfn id=AttributeDefinition><code>AttributeDefinition</code></dfn> : <a href="#Node">Node</a> {
807      <span class=comment>// <a href="#DeclaredValueType">DeclaredValueType</a></span>
808      const unsigned short <a href="#NO_TYPE_ATTR">NO_TYPE_ATTR</a> = 0;
809      const unsigned short <a href="#CDATA_ATTR">CDATA_ATTR</a> = 1;
810      const unsigned short <a href="#ID_ATTR">ID_ATTR</a> = 2;
811      const unsigned short <a href="#IDREF_ATTR">IDREF_ATTR</a> = 3;
812      const unsigned short <a href="#IDREFS_ATTR">IDREFS_ATTR</a> = 4;
813      const unsigned short <a href="#ENTITY_ATTR">ENTITY_ATTR</a> = 5;
814      const unsigned short <a href="#ENTITIES_ATTR">ENTITIES_ATTR</a> = 6;
815      const unsigned short <a href="#NMTOKEN_ATTR">NMTOKEN_ATTR</a> = 7;
816      const unsigned short <a href="#NMTOKENS_ATTR">NMTOKENS_ATTR</a> = 8;
817      const unsigned short <a href="#NOTATION_ATTR">NOTATION_ATTR</a> = 9;
818      const unsigned short <a href="#ENUMERATION_ATTR">ENUMERATION_ATTR</a> = 10;
819      const unsigned short <a href="#UNKNOWN_ATTR">UNKNOWN_ATTR</a> = 11;
820      
821      readonly attribute <a href="#ElementTypeDefinition">ElementTypeDefinition</a> <a href="#ownerElementTypeDefinition">ownerElementTypeDefinition</a>;
822    
823      readonly attribute unsigned short <a href="#declaredType">declaredType</a>;
824      readonly attribute unsigned short <a href="#defaultType">defaultType</a>;
825    
826      <span class=ed>...</span>
827    }</code></pre>
828    
829    <dl>
830    <dt><dfn id=ownerElementTypeDefinition class=dom-attr><code>ownerElementTypeDefinition</code></dfn>
831    of type
832    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>,
833    read$B!>(Bonly</dt>
834      <dd><p>The
835      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a> to
836      which the <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
837      node belongs.</p>
838    
839      <p>On getting, the attribute <em class=rfc2119>MUST</em> return an
840      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a> node.
841      It <em class=rfc2119>MUST</em> be such a node that whose
842      <a href="#attributeDefinitons"><code>attributeDefinitions</code></a>
843      attribute contains the <code>NamedNodeMap</code> object that contains
844      the <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
845      node.  If there is no such an
846      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a> node,
847      then <code>null</code> <em class=rfc2119>MUST</em> be returned.</p>
848    <dt><dfn id=declaredType class=dom-attr><code>declaredType</code></dfn> of type
849    <code>unsigned short</code></dt>
850      <dd><p>The declared type <span class=ed>@@ ref</span> of the attribute.
851      It is expected that this attribute contains a value from the definition group
852      <a href="#DeclaredValueType"><code>DeclaredValueType</code></a>.</p>
853    
854      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
855      value associated to this attribute.</p>
856    
857      <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
858      <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
859      exception if the
860      <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node
861      is read$B!>(Bonly <span class=ed>@@ ref</span>.  Otherwise, it
862      <em class=rfc2119>MUST</em> set the specified value as the value
863      associated to this attribute.</p>
864    
865      <p>If the <code>AttributeDefinition</code> node is created during the process
866      to create a <abbr>DOM</abbr> from an <abbr>XML</abbr> document, an
867      appropriate value from the
868      <a href="#DeclaredValueType"><code>DeclaredValueType</code></a> constant
869      group <em class=rfc2119>MUST</em> be set to the attribute.</p>
870    
871      <!-- DeclaredValueType -->
872    <p>The definition group
873    <dfn id=DeclaredValueType><code>DeclaredValueType</code></dfn> contains
874    integers indicating the declared type of attributes.  The definition
875    group contains the following constants:</p>
876    
877    <table>
878    <thead>
879    <tr><th scope=col>Name<th scope=col>Value<th scope=col>Description</tr>
880    </thead>
881    <tbody>
882    <tr>
883    <th scope=row><dfn id=NO_TYPE_ATTR class=dom-const><code>NO_TYPE_ATTR</code>
884    <td><code>0</code><td>No value <span class=ed>[INFOSET]</span>.</tr>
885    <tr>
886    <th scope=row><dfn id=CDATA_ATTR class=dom-const><code>CDATA_ATTR</code>
887    <td><code>1</code><td><code>CDATA</code> <span class=ed>[XML]</span>.</tr>
888    <tr>
889    <th scope=row><dfn id=ID_ATTR class=dom-const><code>ID_ATTR</code>
890    <td><code>2</code><td><code>ID</code> <span class=ed>[XML]</span>.</tr>
891    <tr>
892    <th scope=row><dfn id=IDREF_ATTR class=dom-const><code>IDREF_ATTR</code>
893    <td><code>3</code><td><code>IDREF</code> <span class=ed>[XML]</span>.</tr>
894    <tr>
895    <th scope=row><dfn id=IDREFS_ATTR class=dom-const><code>IDREFS_ATTR</code>
896    <td><code>4</code><td><code>IDREFS</code> <span class=ed>[XML]</span>.</tr>
897    <tr>
898    <th scope=row><dfn id=ENTITY_ATTR class=dom-const><code>ENTITY_ATTR</code>
899    <td><code>5</code><td><code>ENTITY</code> <span class=ed>[XML]</span>.</tr>
900    <tr>
901    <th scope=row><dfn id=ENTITIES_ATTR class=dom-const><code>ENTITIES_ATTR</code>
902    <td><code>6</code><td><code>ENTITIES</code> <span class=ed>[XML]</span>.</tr>
903    <tr>
904    <th scope=row><dfn id=NMTOKEN_ATTR class=dom-const><code>NMTOKEN_ATTR</code>
905    <td><code>7</code><td><code>NMTOKEN</code> <span class=ed>[XML]</span>.</tr>
906    <tr>
907    <th scope=row><dfn id=NMTOKENS_ATTR class=dom-const><code>NMTOKENS_ATTR</code>
908    <td><code>8</code><td><code>NMTOKENS</code> <span class=ed>[XML]</span>.</tr>
909    <tr>
910    <th scope=row><dfn id=NOTATION_ATTR class=dom-const><code>NOTATION_ATTR</code>
911    <td><code>9</code><td><code>NOTATION</code> <span class=ed>[XML]</span>.</tr>
912    <tr>
913    <th scope=row><dfn id=ENUMERATION_ATTR class=dom-const><code>ENUMERATION_ATTR</code>
914    <td><code>10</code><td>Enumeration <span class=ed>[XML]</span>.</tr>
915    <tr>
916    <th scope=row><dfn id=UNKNOWN_ATTR class=dom-const><code>UNKNOWN_ATTR</code>
917    <td><code>11</code><td>Unknown, because no declaration for the attribute
918    has been read but the [all declaration processed] property
919    <span class=ed>[INFOSET]</span> would be false.</tr>
920    </tbody>
921    </table>
922    
923    <p>If no attribute type information is available, or if the source
924    of the information does not distinguish <q>no value</q> and <q>unknown</q>
925    <span class=ed>[INFOSET]</span>, then the value
926    <a href="#NO_TYPE_ATTR"><code>NO_TYPE_ATTR</code></a>
927    <em class=rfc2119>MUST</em> be used.</p>
928    
929    <div class="note memo">
930    <p>An <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node
931    created by the
932    <a href="#createAttributeDefinition"><code>createAttributeDefinition</code></a>
933    method has its <a href="#declaredType"><code>declaredType</code></a> attribute
934    set to <a href="#NO_TYPE_ATTR"><code>NO_TYPE_ATTR</code></a>.</p>
935    </div>
936    
937    <p>If the source of the information does not distinguish <q>no value</q>
938    and/or <q>unknown</q> <span class=ed>[INFOSET]</span> and
939    <code>CDATA</code> <span class=ed>[XML]</span>, then the value
940    <a href="#CDATA_ATTR"><code>CDATA_ATTR</code></a> <em class=rfc2119>MUST</em>
941    be used.</p>
942    
943    <p>In Perl binding <span class=ed>[PERLBINDING]</span>, the
944    <code>Attr</code> nodes <em class=rfc2119>MUST</em> implement the
945    <a href="#DeclaredValueType"><code>DeclaredValueType</code></a>
946    definition group.</p>
947    
948      </dd>
949    <dt><dfn id=defaultType class=dom-attr><code>defaultType</code></dfn> of
950    type <code>unsigned short</code></dt>
951      <dd><p>The type of the default for the attribute.  It is expected that this
952      attribute contains a value from the definition group
953      <a href="#DefaultValueType"><code>DefaultValueType</code></a>.</p>
954    
955      <p>On getting, the attribute <em class=rfc2119>MUST</em> return
956      the value associated to this attribute.</p>
957    
958      <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
959      <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
960      exception if the
961      <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node
962      is read$B!>(Bonly <span class=ed>@@ ref</span>.  Otherwise, it
963      <em class=rfc2119>MUST</em> set the specified value as the value
964      associated to this attribute.</p>
965    
966      <p>If the
967      <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node is
968      created during the process to create a <abbr>DOM</abbr> from an
969      <abbr>XML</abbr> document, an appropriate value from the
970      <a href="#DefaultValueType"><code>DefaultValueType</code></a> definition
971      group <em class=rfc2119>MUST</em> be set to the attribute.</p>
972    
973      <!-- DefaultValueType -->
974      <p>The definition group
975      <dfn id=DefaultValueType><code>DefaultValueType</code></dfn>
976      contains integers indicating the type of the default for the attribute.
977      The definition group contains the following constans:</p>
978    
979      <table>
980      <thead>
981      <tr><th scope=col>Name<th scope=col>Value<th scope=col>Description</tr>
982      </thead>
983      <tbody>
984      <tr>
985      <th scope=row><dfn id=UNKNOWN_DEFAULT class=dom-const><code>UNKNOWN_DEFAULT</code></dfn>
986      <td><code>0</code><td>Unknown.</tr>
987      <tr>
988      <th scope=row><dfn id=FIXED_DEFAULT class=dom-const><code>FIXED_DEFAULT</code></dfn>
989      <td><code>1</code><td>Provided explicitly and fixed
990      <span class=ed>@@ ref</span> to that value.</tr>
991      <tr>
992      <th scope=row><dfn id=REQUIRED_DEFAULT class=dom-const><code>REQUIRED_DEFAULT</code></dfn>
993      <td><code>2</code><td>No default value and the attribute have to be
994      explicitly specified.</tr>
995      <tr>
996      <th scope=row><dfn id=IMPLIED_DEFAULT class=dom-const><code>IMPLIED_DEFAULT</code></dfn>
997      <td><code>3</code><td>Implied <span class=ed>@@ ref</span>.</tr>
998      <tr>
999      <th scope=row><dfn id=EXPLICIT_DEFAULT class=dom-const><code>EXPLICIT_DEFAULT</code></dfn>
1000      <td><code>4</code><td>Provided explicitly.</tr>
1001      </tbody>
1002      </table>
1003    
1004      <p>If the source of the default type does not distinguish
1005      implied and unknown default types, then the value
1006      <a href="#IMPLIED_DEFAULT"><code>IMPLIED_DEFAULT</code></a>
1007      <em class=rfc2119>MUST</em> be used.</p>
1008    
1009      <div class="note memo">
1010      <p>An <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
1011      node created by the
1012      <a href="#createAttributeDefinition"><code>createAttributeDefinition</code></a>
1013      method has its <a href="#defaultType"><code>defaultType</code></a>
1014      attribute set to
1015      <a href="#UNKNOWN_DEFAULT"><code>UNKNOWN_DEFAULT</code></a>.</p>
1016      </div></dd>
1017    </dl>
1018    
1019    </div>
1020    
1021    </div>
1022    
1023    
1024    
1025    
1026    
1027  <div id="references" class="section reference">  <div id="references" class="section reference">
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