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revision 1.3 by wakaba, Sun Dec 2 04:46:21 2007 UTC revision 1.14 by wakaba, Tue Dec 4 10:27:26 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 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  </div>  </div>
133    
134  <div class=section id=dom-dtdef>  <div class=section id=dom-dtdef>
# Line 138  consists of three interfaces:</p> Line 143  consists of three interfaces:</p>
143  <li><a href="#AttributeDefinition"><code>AttributeDefinition</code></a></li>  <li><a href="#AttributeDefinition"><code>AttributeDefinition</code></a></li>
144  </ul>  </ul>
145    
146  <p>In addition, it adds methods, attributes, and/or constants to interfaces  <p>In addition, it modifies interfaces
147  <a href="#Node"><code>Node</code></a>,  <a href="#Node"><code>Node</code></a>,
148    <a href="#DocumentType"><code>DocumentType</code></a>,
149  <a href="#Entity"><code>Entity</code></a>,  <a href="#Entity"><code>Entity</code></a>,
150  <a href="#EntityReference"><code>EntityReference</code></a>, and  <a href="#EntityReference"><code>EntityReference</code></a>,
151  <a href="#Notation"><code>Notation</code></a>.  <a href="#Notation"><code>Notation</code></a>, and
152  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>  
153    
154  <div class=section id=features>  <div class=section id=features>
155  <h3>Feature Name</h3>  <h3>Feature Name</h3>
# Line 171  feature names with or without version nu Line 174  feature names with or without version nu
174  aforementioned cases.</p>  aforementioned cases.</p>
175  </div>  </div>
176    
177    <div class=section id=section-node>
178    <h3>Modifications to the <code id=Node>Node</code> Interface</h3>
179    
180    <pre class=idl><code>// Additions to the Node interface
181    
182    // Additions to the NodeType definition group
183    const unsigned short <a href="#ELEMENT_TYPE_DEFINITION_NODE">ELEMENT_TYPE_DEFINITION_NODE</a> = 81001;
184    const unsigned short <a href="#ATTRIBUTE_DEFINITION_NODE">ATTRIBUTE_DEFINITION_NODE</a> = 81002;
185    </pre>
186    
187    <p>This specification adds two new types (subinterfaces) of
188    <a href="#Node"><code>Node</code></a>: element type definition (node type
189    <a href="#ELEMENT_TYPE_DEFINITION_NODE"><code>ELEMENT_TYPE_DEFINITION_NODE</code></a>,
190    interface
191    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>) and
192    attribute definition (node type
193    <a href="#ATTRIBUTE_DEFINITION_NODE"><code>ATTRIBUTE_DEFINITION_NODE</code></a>,
194    interface
195    <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>).  For
196    these kinds of nodes, methods and attributes in the
197    <a href="#Node"><code>Node</code></a> interface must behave as following:</p>
198    
199    <dl>
200    <dt><code id=nodeType>nodeType</code></dt>
201      <dd>
202        <p>On getting, the attribute <em class=rfc2119>MUST</em> return
203        <a href="#ELEMENT_TYPE_DEFINITION_NODE"><code>ELEMENT_TYPE_DEFINITION_NODE</code></a>
204        (if the node is an
205        <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>) or
206        <a href="#ATTRIBUTE_DEFINITION_NODE"><code>ATTRIBUTE_DEFINITION_NODE</code></a>
207        (if the node is an
208        <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>).</p>
209    
210        <!-- NodeType -->
211    <p>Two constants are added to the <code id=NodeType>NodeType</code>
212    definition group of the <a href="#Node"><code>Node</code></a> interface as
213    following:</p>
214    <table>
215    <thead>
216    <tr><th scope=col>Name<th scope=col>Value<th scope=col>Description</tr>
217    </thead>
218    <tbody>
219    <tr>
220    <th scope=row><dfn id=ELEMENT_TYPE_DEFINITION_NODE class=dom-const><code>ELEMENT_TYPE_DEFINITION_NODE</code></dfn>
221    <td><code>81001</code><td>The node is an
222    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>.</tr>
223    <tr>
224    <th scope=row><dfn id=ATTRIBUTE_DEFINITION_NODE class=dom-const><code>ATTRIBUTE_DEFINITION_NODE</code></dfn>
225    <td><code>81002</code><td>The node is an
226    <a href="#ElementTypeDefinition"><code>AttributeDefinition</code></a>.</tr>
227    </tbody>
228    </table>
229      </dd>
230    <dt class=ed>@@ ...</dt>
231    </dl>
232    
233    </div>
234    
235    <div class=section id=section-documentxdoctype>
236    <h3>The <code>DocumentXDoctype</code> Interface</h3>
237    
238    <pre class=idl><code>interface <dfn id=DocumentXDoctype><code>DocumentXDoctype</code></dfn> {
239      DocumentType <a href="#createDocumentTypeDefinition">createDocumentTypeDefinition</a>
240        (in DOMString <a href="#createDocumentTypeDefinition-name"><var>name</var></a>)
241        raises (DOMException);
242      <a href="#ElementTypeDefinition">ElementTypeDefinition</a> <a href="#createElementTypeDefinition">createElementTypeDefinition</a>
243        (in DOMString <a href="#createElementTypeDefinition-name"><var>name</var></a>)
244        raises (DOMException);
245      <a href="#AttributeDefinition">AttributeDefinition</a> <a href="#createAttributeDefinition">createAttributeDefinition</a>
246        (in DOMString <a href="#createAttributeDefinition-name"><var>name</var></a>)
247        raises (DOMException);
248      <a href="#Entity">Entity</a> <a href="#createGeneralEntity">createGeneralEntityDefinition</a>
249        (in DOMString <a href="#createGeneralEntity-name"><var>name</var></a>)
250        raises (DOMException);
251      <a href="#Notation">Notation</a> <a href="#createNotation">createNotation</a>
252        (in DOMString <a href="#createNotation-name"><var>name</var></a>)
253        raises (DOMException);
254    }</code></pre>
255    
256    <div class=ed>@@ cast definition</div>
257    
258    <dl>
259    <dt><dfn id=createDocumentTypeDefinition class=dom-method><code>createDocumentTypeDefinition</code></dfn>,
260    method</dt>
261      <dd>
262        <p>This method creates a <code>DocumentType</code> node with the specified
263        name, belonging to the document.</p>
264        <p>The <dfn id=createDocumentTypeDefinition-name class=dom-param><var>name</var></dfn>
265        parameter is the name of the document type.</p>
266    
267        <p>When invoked, the method <em class=rfc2119>MUST</em> create and
268        return a <code>DocumentType</code> node with the following attributes:</p>
269        <dl>
270        <dt><code>attributes</code>, <code>parentNode</code></dt>
271          <dd><code>null</code>.</dd>
272        <dt><code>elementTypes</code>, <code>generalEntities</code>, and
273        <code>notations</code></dt>
274          <dd>Empty <code>NamedNodeMap</code> objects.</dd>
275        <dt><code>entities</code></dt>
276          <dd>The same value as the <code>generalEntities</code> attribute.</dd>
277        <dt><code>childNodes</code></dt>
278          <dd>An empty <code>NodeList</code> object.</dd>
279        <dt><code>internalSubset</code>, <code>publicId</code>, and
280        <code>systemId</code></dt>
281          <dd>Empty strings.</dd>
282        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
283          <dd><code>false</code>.</dd>
284        <dt><code>nodeName</code></dt>
285          <dd><a href="#createDocumentTypeDefinition-name"><var>name</var></a>.</dd>
286        <dt><code>ownerDocument</code></dt>
287          <dd>The <code>Document</code> over which the method is invoked.</dd>
288        </dl>
289        <p>In addition, the method <em class=rfc2119>MUST</em> be marked as
290        containing five general entity declarations: <code>amp</code>,
291        <code>lt</code>, <code>gt</code>, <code>quot</code>, and
292        <code>apos</code>.</p>
293      </dd>
294    <dt><dfn id=createElementTypeDefinition class=dom-method><code>createElementTypeDefinition</code></dfn>,
295    method</dt>
296      <dd>
297        <p>This method creates a <code>ElementTypeDefinition</code> node with the
298        specified name, belonging to the document.</p>
299        <p>The <dfn id=createElementTypeDefinition-name class=dom-param><var>name</var></dfn>
300        parameter is the name of the element type defined by the element
301        type definition.</p>
302    
303        <p>When invoked, the method <em class=rfc2119>MUST</em> create and
304        return an
305        <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
306        node with the following attributes:</p>
307        <dl>
308        <dt><a href="#attributeDefinitions"><code>attributeDefinitions</code></a></dt>
309          <dd>An empty <code>NamedNodeMap</code> object.</dd>
310        <dt><code>attributes</code>, <code>parentNode</code></dt>
311          <dd><code>null</code>.</dd>
312        <dt><code>childNodes</code></dt>
313          <dd>An empty <code>NodeList</code> object.</dd>
314        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
315          <dd><code>false</code>.</dd>
316        <dt><code>nodeName</code></dt>
317          <dd><a href="#createElementTypeDefinition-name"><var>name</var></a>.</dd>
318        <dt><code>ownerDocument</code></dt>
319          <dd>The <code>Document</code> node over which the method is invoked.</dd>
320        <dt><a href="#ownerDocumentTypeDefinition"><code>ownerDocumentTypeDefinition</code></a></dt>
321          <dd><code>null</code>.</dd>
322        <dt class=ed>@@ Ensure all attributes are defined</dt>
323        </dl>
324      </dd>
325    <dt><dfn id=createAttributeDefinition class=dom-method><code>createAttributeDefinition</code></dfn>,
326    method</dt>
327      <dd>
328        <p>This method creates a <code>AttributeDefinition</code> node with the
329        specified name, belonging to the document.</p>
330        <p>The <dfn id=createAttributeDefinition-name class=dom-param><var>name</var></dfn>
331        parameter is the name of the attribute defined by the attribute
332        definition.</p>
333    
334        <p>When invoked, the method <em class=rfc2119>MUST</em> create and
335        return an
336        <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
337        node with the following attributes:</p>
338        <dl>
339        <dt><code>allowedTokens</code></dt>
340          <dd>An empty <code>DOMStringList</code> object.</dd>
341        <dt><code>attributes</code>,
342        <a href="#ownerElementTypeDefinition"><code>ownerElementTypeDefinition</code></a>,
343        and <code>parentNode</code></dt>
344          <dd><code>null</code>.</dd>
345        <dt><code>childNodes</code></dt>
346          <dd>An empty <code>NodeList</code> object.</dd>
347        <dt><code>declaredType</code></dt>
348          <dd><a href="#NO_TYPE_ATTR"><code>NO_TYPE_ATTR</code></a>.</dd>
349        <dt><code>defaultType</code></dt>
350          <dd><a href="#UNKNOWN_DEFAULT"><code>UNKNOWN_DEFAULT</code></a>.</dd>
351        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
352          <dd><code>false</code>.</dd>
353        <dt><code>nodeName</code></dt>
354          <dd><a href="#createAttributeDefinition-name"><var>name</var></a>.</dd>
355        <dt><code>ownerDocument</code></dt>
356          <dd>The <code>Document</code> node over which the method is invoked.</dd>
357        <dt class=ed>@@ Ensure all attributes are defined</dt>
358        </dl>
359    
360        <div class=ed>
361        <p>@@ Should we keep these statements?:
362    However, if the &lt;cfg::cfg|xml-id> configuration
363    parameter is set to <code>true</code> and the <var>name</var>
364    is <code>xml:id</code>, then the [CODE(DOMa)@en[[[declaredType]]]]
365    attribute is set to <code>ID_ATTR</code>.
366    [CODE(DOMa)@en[[[defaultType]]]]?</p>
367        </div>
368      </dd>
369    <dt><dfn id=createGeneralEntity class=dom-method><code>createGeneralEntity</code></dfn>,
370    method</dt>
371      <dd>
372        <p>This method creates a <a href="#Entity"><code>Entity</code></a> node
373        with the specified name, which represents a general entity, belonging to
374        the document.</p>
375        <p>The <dfn id=createGeneralEntity-name class=dom-param><var>name</var></dfn>
376        parameter is the name of the general entity.</p>
377    
378        <p>When invoked, the method <em class=rfc2119>MUST</em> create and return
379        an <a href="#Entity"><code>Entity</code></a> node with the following
380        attributes:</p>
381        <dl>
382        <dt><code>attributes</code>, <code>notationName</code>,
383        <a href="#ownerDocumentTypeDefinition"><code>ownerDocumentTypeDefinition</code></a>,
384        and <code>parentNode</code></dt>
385          <dd><code>null</code>.</dd>
386        <dt><code>childNodes</code></dt>
387          <dd>An empty <code>NodeList</code> object.</dd>
388        <dt><code>manakaiDeclarationBaseURI</code>,
389        <code>manakaiEntityBaseURI</code>, and
390        <code>manakaiEntityURI</code> <span class=ed>@@ ref</span></dt>
391          <dd>No explicit value is set.</dd>
392        <dt><code>manakaiHasReplacementTree</code> and
393        <code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
394          <dd><code>false</code>.</dd>
395        <dt><code>nodeName</code></dt>
396          <dd><a href="#createGeneralEntity-name"><var>name</var></a>.</dd>
397          <dd>
398            <div class="note memo">
399              <p>It is not an error for
400              <a href="#createGeneralEntity-name"><var>name</var></a> matching
401              to the name of one of predefined general parsed entities in
402              <abbr>XML</abbr> or <abbr>HTML</abbr>.  For example,
403              <a href="#createGeneralEntity-name"><var>name</var></a> might be
404              <code>amp</code>, resulting in an
405              <a href="#Entity"><code>Entity</code></a> node
406              with its <code>nodeName</code> attribute set to <code>amp</code>.</p>
407            </div>
408          </dd>
409        <dt><code>ownerDocument</code></dt>
410          <dd>The <code>Document</code> node over which the method is invoked.</dd>
411        <dt><code>publicId</code>, and <code>systemId</code></dt>
412          <dd><code>null</code>.</dd>
413          <dd class=ed>@@ publicId and systemId should be empty string?</dd>
414        <dt class=ed>@@ Ensure all attributes are defined</dd>
415        </dl>
416      </dd>
417    <dt><dfn id=createNotation class=dom-method><code>createNotation</code></dfn>,
418    method</dt>
419      <dd>
420        <p>This method creates a <code>Notation</code> node with the
421        specified name, belonging to the document.</p>
422        <p>The <dfn id=createNotation-name class=dom-param><var>name</var></dfn>
423        parameter is the name of the notation.</p>
424    
425        <p>When invoked, the method <em class=rfc2119>MUST</em> create and return
426        a <code>Notation</code> node with the following attributes:</p>
427        <dl>
428        <dt><code>attributes</code>,
429        <a href="#ownerDocumentTypeDefinition"><code>ownerDocumentTypeDefinition</code></a>,
430        and <code>parentNode</code></dt>
431          <dd><code>null</code>.</dd>
432        <dt><code>childNodes</code></dt>
433          <dd>An empty <code>NodeList</code> object.</dd>
434        <dt><code>manakaiDeclarationBaseURI</code></dt>
435          <dd>No explicit value is set.</dd>
436        <dt><code>manakaiReadOnly</code> <span class=ed>[manakai]</span></dt>
437          <dd><code>false</code>.</dd>
438        <dt><code>nodeName</code></dt>
439          <dd><a href="#createNotation-name"><var>name</var></a>.</dd>
440        <dt><code>ownerDocument</code></dt>
441          <dd>The <code>Document</code> node over which the method is invoked.</dd>
442        <dt><code>publicId</code> and <code>systemId</code></dt>
443          <dd><code>null</code>.</dd>
444          <dd class=ed>@@ publicId and systemId should be empty string?</dd>
445        <dt class=ed>@@ Ensure all attributes are defined</dt>
446        </dl>
447      </dd>
448    </dl>
449    
450    <p>These methods <em class=rfc2119>MUST</em> raise an
451    <code>INVALID_CHARACTER_ERR</code> exception <span class=ed>@@ ref</span>
452    if <var>name</var> is <em>not</em> a legal <code>Name</code> according to
453    the <abbr>XML</abbr> version in use, as specified in the
454    <code>xmlVersion</code> attribute of the <code>Document</code> node.</p>
455    
456    <div class="note memo">
457    <p>Non$B!>(B<abbr>XML</abbr> case is intentionally left unspecified for now,
458    since <abbr>DOM3</abbr> specification <span class=ed>@@ ref</span> does not
459    define it for <code>Document</code> methods.</p>
460    
461    <p><var>name</var> does not have to be a namespace qualified name.</p>
462    </div>
463    
464    </div>
465    
466    <div class=section id=section-documenttypedefinition>
467    <h3>The <code>DocumentTypeDefinition</code> Interface</h3>
468    
469    <pre class=idl><code>interface <dfn id=DocumentTypeDefinition><code>DocumentTypeDefinition</code></dfn> {
470      readonly attribute NamedNodeMap <a href="#elementTypes">elementTypes</a>;
471      readonly attribute NamedNodeMap <a href="#generalEntities">generalEntities</a>;
472      readonly attribute NamedNodeMap <a href="#notations">notations</a>;
473    
474      <a href="#ElementTypeDefinition">ElementTypeDefinition</a> <a href="#getElementTypeDefinitionNode">getElementTypeDefinitionNode</a>
475        (in DOMString <a href="#getElementTypeDefinitionNode-name"><var>name</var></a>);
476      <a href="#Entity">Entity</a> <a href="#getGeneralEntityNode">getGeneralEntityNode</a>
477        (in DOMString <a href="#getGeneralEntityNode-name"><var>name</var></a>);
478      <a href="#Notation">Notation</a> <a href="#getNotationNode">getNotationNode</a>
479        (in DOMString <a href="#getNotationNode-name"><var>name</var></a>);
480    
481      void <a href="#setElementTypeDefinitionNode">setElementTypeDefinitionNode</a>
482        (in DOMString <a href="#setElementTypeDefinitionNode-node"><var>node</var></a>)
483        raises (DOMException);
484      void <a href="#setGeneralEntityNode">setGeneralEntityNode</a>
485        (in DOMString <a href="#setGeneralEntityNode-node"><var>node</var></a>)
486        raises (DOMException);
487      void <a href="#setNotationNode">setNotationNode</a>
488        (in DOMString <a href="#setNotationNode-node"><var>node</var></a>)
489        raises (DOMException);
490    }</code></pre>
491    
492    <pre class=ed>
493    [1] In an implementation that supports the
494    [CODE(URI)@en[[[http://suika.fam.cx/www/2006/feature/XDoctype]]]]
495    feature, a [CODE(DOMi)@en[[[DocumentType]]]] node
496    must implement the [CODE(DOMi)@en[[[DocumentTypeDefinition]]]]
497    interface.  See [[DOM XML Document Type Definition]>>3] for
498    details.
499    </pre>
500    
501    <dl>
502    <dt><dfn id=elementTypes class=dom-attr><code>elementTypes</code></dfn> of
503    type <code>NamedNodeMap</code>, read$B!>(Bonly</dt>
504      <dd><p>A live <code>NamedNodeMap</code> object that contains all the element
505      type definitions belonging to the <code>DocumentType</code> node.</p>
506    
507      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
508      <code>NamedNodeMap</code> object that contains all the
509      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>
510      nodes belonging to the <code>DocumentType</code> node.  The
511      <code>NamedNodeMap</code> object <em class=rfc2119>MUST</em> be read$B!>(Bonly
512      if and only if the node is read$B!>(Bonly.  The <code>NamedNodeMap</code>
513      object <em class=rfc2119>MUST</em> be live and the same object
514      <em class=rfc2119>MUST</em> be returned for any invocation.</p>
515    
516      <p>If the <code>DocumentType</code> node is created during the process
517      to create a <abbr>DOM</abbr> from an <abbr>XML</abbr> document, the following
518      requirements are applied:  The <code>NamedNodeMap</code> object in the
519      <a href="#elementTypes"><code>elementType</code></a> attribute
520      <em class=rfc2119>MUST</em> be so transformed that the object contains
521      the <code>ElementTypeDefinition</code> nodes for the element types
522      whose name is presented as the <code>Name</code> of the element type or
523      attribute definition list declarations processed by the <abbr>XML</abbr>
524      processor.  If there is more than one element type declarations for an
525      element type, then the declarations other than the first one
526      <em class=rfc2119>MUST</em> be ignored for the purpose of constructing the
527      <code>NamedNodeMap</code> object.</p></dd>
528    <dt><dfn id=generalEntities class=dom-attr><code>generalEntities</code></dfn>
529    of type <code>NamedNodeMap</code>, read$B!>(Bonly</dt>
530      <dd><p>A live <code>NamedNodeMap</code> object that contains all the general
531      entities belonging to the <code>DocumentType</code> node.</p>
532      
533      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
534      same value as the <code>entities</code> attribute (defined in the
535      <code>DocumentType</code> interface) of the same node.</p>
536    
537      <div class="note memo">
538        <p>This attribute is part of the interface for historical reason.</p>
539      </div></dd>
540    <!--
541    All entities declared in the document type definition
542    contained in or referenced from the document entity
543    might not be exposed through this collection, depending
544    on the information provided by the XML processor for
545    the DOM implementation.  In particular, it might not
546    contain any entity if entity references are expanded
547    at the parse time.  An implementation [['''MUST NOT''']]
548    expose an [CODE(DOMi)@en[[[Entity]]]] node whose [CODE(DOMa)@en[[[nodeName]]]]
549    is equal to the name of one of five predefined general entities in
550    XML through the collection as the result of parsing of an XML
551    document that has no error.  Duplicate entity declarations are also discarded.
552    
553    The attribute [['''MUST''']] return the [CODE(DOMi)@en[[[NamedNodeMap]]]]
554    object that contains all the [CODE(DOMi)@en[[[Entity]]]] nodes
555    representing general entities belong to the node.  The returned
556    [CODE(DOMi)@en[[[NamedNodeMap]]]] object [['''MUST''']] be read-only if and only if
557    the node is read-only. Note that the [CODE(DOMi)@en[[[NamedNodeMap]]]] object is live
558    and therefore any change of read-only flag on the node is immediately
559    reflected by that of the object.
560    -->
561    <dt><dfn id=notations class=dom-attr><code>notations</code></dfn> of type
562    <code>notations</code>, read$B!>(Bonly</code>
563      <dd><p>A live <code>NamedNodeMap</code> object that contains all the
564      notations belonging to the <code>DocumentType</code> node.</p>
565      
566      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
567      same value as the <code>notations</code> attribute (defined in the
568      <code>DocumentType</code> interface) of the same node.</p>
569    
570      <div class="note memo">
571        <p>This attribute is part of the interface for historical reason.</p>
572        <p>Implementations are not required to implement the
573        <code>notations</code> attribute twice (for <code>DocumentType</code>
574        and <code>DocumentTypeDefinition</code> interfaces); they share exactly
575        same definition.</p>
576      </div></dd>
577    <!--
578    If the [CODE(DOMi)@en[[[DocumentTypeDefinition]]]] node is
579    created from an XML document, duplicate notation declarations, if any, in DTD
580    [['''MUST NOT''']] result in a node in the [CODE(DOMi)@en[[[NamedNodeMap]]]]
581    object and only the first declaration [['''MUST''']] be
582    made available as a [CODE(DOMi)@en[[[Notation]]]] node.
583    
584    ;; This definition is based on one for the
585    [CODE(DOMa)@en[[[notations]]]] attribute of the
586    [CODE(DOMi)@en[[[DocumentType]]]] interface in DOM XML module.
587    Since duplication is violation to the Validity Constraint,
588    XML parsers might vary on how notations are notified to
589    the application.  In particular, [CODE(InfoProp)@en[[[notations]]]]
590    property of the document information item in XML Information Set
591    is so defined that in case ''any'' notation is declared for
592    multiple times then the property has no value.
593    
594    The attribute [['''MUST''']] return the [CODE(DOMi)@en[[[NamedNodeMap]]]]
595    object that contains all the [CODE(DOMi)@en[[[Notation]]]] nodes
596    representing notations belong to the node.  The returned
597    [CODE(DOMi)@en[[[NamedNodeMap]]]] object [['''MUST''']] be read-only if and only if
598    the node is read-only. Note that the [CODE(DOMi)@en[[[NamedNodeMap]]]] object is live
599    and therefore any change of read-only flag on the node is immediately
600    reflected by that of the object.
601    -->
602    
603    <dt class=ed>@@ other members...
604    </dl>
605    
606    <div class=ed>
607    <p>A future version of this interface might define the
608    <code>parameterEntities</code> and getter/setter for parameter entities.
609    </div>
610    
611    </div>
612    
613    <div class=section id=section-elementtypedefinition>
614    <h3>The <code>ElementTypeDefinition</code> Interface</h3>
615    
616    <pre class=idl><code>interface <dfn id=ElementTypeDefinition><code>ElementTypeDefinition</code></dfn> : <a href="#Node">Node</a> {
617      readonly attribute <a href="#ownerDocumentTypeDefinition">ownerDocumentTypeDefinition</a>;
618    
619      <span class=ed>@@ more</span>
620    }</code></pre>
621    
622    <pre class=ed>** Modifications to [CODE(DOMi)@en[[[Node]]]] members
623    
624    [3] The getter of the [CODE(DOMa)@en[[[attributes]]]] attribute
625    of an [CODE(DOMi)@en[[[ElementTypeDefinition]]]] object
626    [['''MUST''']] return [CODE(IDL)@en[[[null]]]].
627    
628    [4] The getter of the [CODE(DOMa)@en[[[baseURI]]]] attribute
629    of an [CODE(DOMi)@en[[[ElementTypeDefinition]]]] object
630    [['''MUST''']] return the [CODE(DOMa)@en[[[baseURI]]]]
631    of the [CDOE(DOMa)@en[[[ownerDocument]]]] of the
632    [CODE(DOMi)@en[[[ElementTypeDefinition]]]] object.
633    Note that it might be [CODE(IDL)@en[[[null]]]].
634    
635    [1] The getter of the [CODE(DOMa)@en[[[nodeName]]]] attribute
636    of an [CODE(DOMi)@en[[[ElementTypeDefinition]]]] object
637    [['''MUST''']] return the name of the element type.
638    
639    [2] The getters of the [CODE(DOMa)@en[[[nodeValue]]]]
640    and [CODE(DOMa)@en[[[textContent]]]] attributes
641    of an [CODE(DOMi)@en[[[ElementTypeDefinition]]]]
642    object [['''MUST''']] return [CODE(IDL)@en[[[null]]]].
643    
644    ;; Thus, the setter of these attributes do nothing.
645    
646    The setter of the [CODE(DOMa)@en[[[textContent]]]]
647    attribute of an [CODE(DOMi)@en[[[ElementTypeDefinition]]]]
648    object [['''MUST NOT''']] throw a
649    [CODE(DOMc)@en[[[NO_MODIFICATION_ALLOWED_ERR]]]].
650    
651    ** The [CODE(DOMi)@en[ElementTypeDefinition]] Interface
652    
653    [5] The
654    [DFN@en[[CODE(DOMa)@en[[[ownerDocumentTypeDefinition]]]] attribute]]
655    of the [CODE(DOMi)@en[[[ElementTypeDefinition]]]]
656    interface is defined in [[manakai//DOM Extensions]>>50].</pre>
657    </div>
658    
659    <div class=section id=section-attributedefinition>
660    <h3>The <code>AttributeDefinition</code> Interface</h3>
661    
662    <pre class=idl><code>interface <dfn id=AttributeDefinition><code>AttributeDefinition</code></dfn> : <a href="#Node">Node</a> {
663      <span class=comment>// <a href="#DeclaredValueType">DeclaredValueType</a></span>
664      const unsigned short <a href="#NO_TYPE_ATTR">NO_TYPE_ATTR</a> = 0;
665      const unsigned short <a href="#CDATA_ATTR">CDATA_ATTR</a> = 1;
666      const unsigned short <a href="#ID_ATTR">ID_ATTR</a> = 2;
667      const unsigned short <a href="#IDREF_ATTR">IDREF_ATTR</a> = 3;
668      const unsigned short <a href="#IDREFS_ATTR">IDREFS_ATTR</a> = 4;
669      const unsigned short <a href="#ENTITY_ATTR">ENTITY_ATTR</a> = 5;
670      const unsigned short <a href="#ENTITIES_ATTR">ENTITIES_ATTR</a> = 6;
671      const unsigned short <a href="#NMTOKEN_ATTR">NMTOKEN_ATTR</a> = 7;
672      const unsigned short <a href="#NMTOKENS_ATTR">NMTOKENS_ATTR</a> = 8;
673      const unsigned short <a href="#NOTATION_ATTR">NOTATION_ATTR</a> = 9;
674      const unsigned short <a href="#ENUMERATION_ATTR">ENUMERATION_ATTR</a> = 10;
675      const unsigned short <a href="#UNKNOWN_ATTR">UNKNOWN_ATTR</a> = 11;
676      
677      readonly attribute <a href="#ElementTypeDefinition">ElementTypeDefinition</a> <a href="#ownerElementTypeDefinition">ownerElementTypeDefinition</a>;
678    
679      readonly attribute unsigned short <a href="#declaredType">declaredType</a>;
680      readonly attribute unsigned short <a href="#defaultType">defaultType</a>;
681    
682      <span class=ed>...</span>
683    }</code></pre>
684    
685    <pre class=ed>** Modifications to [CODE(DOMi)@en[[[Node]]]] members
686    
687    [3] The getter of the [CODE(DOMa)@en[[[attributes]]]] attribute
688    of an [CODE(DOMi)@en[[[AttributeDefinition]]]] object
689    [['''MUST''']] return [CODE(IDL)@en[[[null]]]].
690    
691    [9] The getter of the [CODE(DOMa)@en[[[baseURI]]]] attribute
692    of an [CODE(DOMi)@en[[[AttributeDefinition]]]] object
693    [['''MUST''']] return the [CODE(DOMa)@en[[[baseURI]]]]
694    of the [CDOE(DOMa)@en[[[ownerDocument]]]] of the
695    [CODE(DOMi)@en[[[AttributeDefinition]]]] object.
696    Note that it might be [CODE(IDL)@en[[[null]]]].
697    
698    [1] The getter of the [CODE(DOMa)@en[[[nodeName]]]] attribute
699    of an [CODE(DOMi)@en[[[AttributeDefinition]]]] object
700    [['''MUST''']] return the name of the attribute.
701    
702    [2] The getter of the [CODE(DOMa)@en[[[nodeValue]]]] attribute
703    of an [CODE(DOMi)@en[[[AttributeDefinition]]]] object
704    [['''MUST''']] return the normalized default value
705    of the attribute.
706    
707    @@
708    
709    [4] The getter of the [CODE(DOMa)@en[[[textContent]]]]
710    attribute of an [CODE(DOMi)@en[[[AttributeDefinition]]]]
711    object [['''MUST''']] behave as if it were an
712    [CODE(DOMi)@en[[[Attr]]]] object.
713    
714    The setter of the [CODE(DOMa)@en[[[textContent]]]] attribute
715    of an [CODE(DOMi)@en[[[AttributeDefinition]]]] object
716    [['''MUST''']] behave as if the following algorithm
717    is performed:
718    = If the [CODE(DOMi)@en[[[AttributeDefinition]]]]
719    object is read-only, then throw an
720    [CODE(DOMc)@en[[[NO_MODIFICATION_ALLOWED_ERR]]]].
721    = Remove any child node the node has.
722    = If the new value is not empty and not [CODE(IDL)@en[[[null]]]],
723    then create a [CODE(DOMi)@en[[[Text]]]] node
724    whose [CODE(DOMa)@en[[[data]]]] is the new value
725    and append it to the [CODE(DOMi)@en[[[AttributeDefinition]]]].
726    </pre>
727    
728    <dl>
729    <dt><dfn id=ownerElementTypeDefinition class=dom-attr><code>ownerElementTypeDefinition</code></dfn>
730    of type
731    <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a>,
732    read$B!>(Bonly</dt>
733      <dd><p>The
734      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a> to
735      which the <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
736      node belongs.</p>
737    
738      <p>On getting, the attribute <em class=rfc2119>MUST</em> return an
739      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a> node.
740      It <em class=rfc2119>MUST</em> be such a node that whose
741      <a href="#attributeDefinitons"><code>attributeDefinitions</code></a>
742      attribute contains the <code>NamedNodeMap</code> object that contains
743      the <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
744      node.  If there is no such an
745      <a href="#ElementTypeDefinition"><code>ElementTypeDefinition</code></a> node,
746      then <code>null</code> <em class=rfc2119>MUST</em> be returned.</p>
747    <dt><dfn id=declaredType class=dom-attr><code>declaredType</code></dfn> of type
748    <code>unsigned short</code></dt>
749      <dd><p>The declared type <span class=ed>@@ ref</span> of the attribute.
750      It is expected that this attribute contains a value from the definition group
751      <a href="#DeclaredValueType"><code>DeclaredValueType</code></a>.</p>
752    
753      <p>On getting, the attribute <em class=rfc2119>MUST</em> return the
754      value associated to this attribute.</p>
755    
756      <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
757      <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
758      exception if the
759      <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node
760      is read$B!>(Bonly <span class=ed>@@ ref</span>.  Otherwise, it
761      <em class=rfc2119>MUST</em> set the specified value as the value
762      associated to this attribute.</p>
763    
764      <p>If the <code>AttributeDefinition</code> node is created during the process
765      to create a <abbr>DOM</abbr> from an <abbr>XML</abbr> document, an
766      appropriate value from the
767      <a href="#DeclaredValueType"><code>DeclaredValueType</code></a> constant
768      group <em class=rfc2119>MUST</em> be set to the attribute.</p>
769    
770      <!-- DeclaredValueType -->
771    <p>The definition group
772    <dfn id=DeclaredValueType><code>DeclaredValueType</code></dfn> contains
773    integers indicating the declared type of attributes.  The definition
774    group contains the following constants:</p>
775    
776    <table>
777    <thead>
778    <tr><th scope=col>Name<th scope=col>Value<th scope=col>Description</tr>
779    </thead>
780    <tbody>
781    <tr>
782    <th scope=row><dfn id=NO_TYPE_ATTR class=dom-const><code>NO_TYPE_ATTR</code>
783    <td><code>0</code><td>No value <span class=ed>[INFOSET]</span>.</tr>
784    <tr>
785    <th scope=row><dfn id=CDATA_ATTR class=dom-const><code>CDATA_ATTR</code>
786    <td><code>1</code><td><code>CDATA</code> <span class=ed>[XML]</span>.</tr>
787    <tr>
788    <th scope=row><dfn id=ID_ATTR class=dom-const><code>ID_ATTR</code>
789    <td><code>2</code><td><code>ID</code> <span class=ed>[XML]</span>.</tr>
790    <tr>
791    <th scope=row><dfn id=IDREF_ATTR class=dom-const><code>IDREF_ATTR</code>
792    <td><code>3</code><td><code>IDREF</code> <span class=ed>[XML]</span>.</tr>
793    <tr>
794    <th scope=row><dfn id=IDREFS_ATTR class=dom-const><code>IDREFS_ATTR</code>
795    <td><code>4</code><td><code>IDREFS</code> <span class=ed>[XML]</span>.</tr>
796    <tr>
797    <th scope=row><dfn id=ENTITY_ATTR class=dom-const><code>ENTITY_ATTR</code>
798    <td><code>5</code><td><code>ENTITY</code> <span class=ed>[XML]</span>.</tr>
799    <tr>
800    <th scope=row><dfn id=ENTITIES_ATTR class=dom-const><code>ENTITIES_ATTR</code>
801    <td><code>6</code><td><code>ENTITIES</code> <span class=ed>[XML]</span>.</tr>
802    <tr>
803    <th scope=row><dfn id=NMTOKEN_ATTR class=dom-const><code>NMTOKEN_ATTR</code>
804    <td><code>7</code><td><code>NMTOKEN</code> <span class=ed>[XML]</span>.</tr>
805    <tr>
806    <th scope=row><dfn id=NMTOKENS_ATTR class=dom-const><code>NMTOKENS_ATTR</code>
807    <td><code>8</code><td><code>NMTOKENS</code> <span class=ed>[XML]</span>.</tr>
808    <tr>
809    <th scope=row><dfn id=NOTATION_ATTR class=dom-const><code>NOTATION_ATTR</code>
810    <td><code>9</code><td><code>NOTATION</code> <span class=ed>[XML]</span>.</tr>
811    <tr>
812    <th scope=row><dfn id=ENUMERATION_ATTR class=dom-const><code>ENUMERATION_ATTR</code>
813    <td><code>10</code><td>Enumeration <span class=ed>[XML]</span>.</tr>
814    <tr>
815    <th scope=row><dfn id=UNKNOWN_ATTR class=dom-const><code>UNKNOWN_ATTR</code>
816    <td><code>11</code><td>Unknown, because no declaration for the attribute
817    has been read but the [all declaration processed] property
818    <span class=ed>[INFOSET]</span> would be false.</tr>
819    </tbody>
820    </table>
821    
822    <p>If no attribute type information is available, or if the source
823    of the information does not distinguish <q>no value</q> and <q>unknown</q>
824    <span class=ed>[INFOSET]</span>, then the value
825    <a href="#NO_TYPE_ATTR"><code>NO_TYPE_ATTR</code></a>
826    <em class=rfc2119>MUST</em> be used.</p>
827    
828    <div class="note memo">
829    <p>An <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node
830    created by the
831    <a href="#createAttributeDefinition"><code>createAttributeDefinition</code></a>
832    method has its <a href="#declaredType"><code>declaredType</code></a> attribute
833    set to <a href="#NO_TYPE_ATTR"><code>NO_TYPE_ATTR</code></a>.</p>
834    </div>
835    
836    <p>If the source of the information does not distinguish <q>no value</q>
837    and/or <q>unknown</q> <span class=ed>[INFOSET]</span> and
838    <code>CDATA</code> <span class=ed>[XML]</span>, then the value
839    <a href="#CDATA_ATTR"><code>CDATA_ATTR</code></a> <em class=rfc2119>MUST</em>
840    be used.</p>
841    
842    <p>In Perl binding <span class=ed>[PERLBINDING]</span>, the
843    <code>Attr</code> nodes <em class=rfc2119>MUST</em> implement the
844    <a href="#DeclaredValueType"><code>DeclaredValueType</code></a>
845    definition group.</p>
846    
847      </dd>
848    <dt><dfn id=defaultType class=dom-attr><code>defaultType</code></dfn> of
849    type <code>unsigned short</code></dt>
850      <dd><p>The type of the default for the attribute.  It is expected that this
851      attribute contains a value from the definition group
852      <a href="#DefaultValueType"><code>DefaultValueType</code></a>.</p>
853    
854      <p>On getting, the attribute <em class=rfc2119>MUST</em> return
855      the 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
866      <a href="#AttributeDefinition"><code>AttributeDefinition</code></a> node is
867      created during the process to create a <abbr>DOM</abbr> from an
868      <abbr>XML</abbr> document, an appropriate value from the
869      <a href="#DefaultValueType"><code>DefaultValueType</code></a> definition
870      group <em class=rfc2119>MUST</em> be set to the attribute.</p>
871    
872      <!-- DefaultValueType -->
873      <p>The definition group
874      <dfn id=DefaultValueType><code>DefaultValueType</code></dfn>
875      contains integers indicating the type of the default for the attribute.
876      The definition group contains the following constans:</p>
877    
878      <table>
879      <thead>
880      <tr><th scope=col>Name<th scope=col>Value<th scope=col>Description</tr>
881      </thead>
882      <tbody>
883      <tr>
884      <th scope=row><dfn id=UNKNOWN_DEFAULT class=dom-const><code>UNKNOWN_DEFAULT</code></dfn>
885      <td><code>0</code><td>Unknown.</tr>
886      <tr>
887      <th scope=row><dfn id=FIXED_DEFAULT class=dom-const><code>FIXED_DEFAULT</code></dfn>
888      <td><code>1</code><td>Provided explicitly and fixed
889      <span class=ed>@@ ref</span> to that value.</tr>
890      <tr>
891      <th scope=row><dfn id=REQUIRED_DEFAULT class=dom-const><code>REQUIRED_DEFAULT</code></dfn>
892      <td><code>2</code><td>No default value and the attribute have to be
893      explicitly specified.</tr>
894      <tr>
895      <th scope=row><dfn id=IMPLIED_DEFAULT class=dom-const><code>IMPLIED_DEFAULT</code></dfn>
896      <td><code>3</code><td>Implied <span class=ed>@@ ref</span>.</tr>
897      <tr>
898      <th scope=row><dfn id=EXPLICIT_DEFAULT class=dom-const><code>EXPLICIT_DEFAULT</code></dfn>
899      <td><code>4</code><td>Provided explicitly.</tr>
900      </tbody>
901      </table>
902    
903      <p>If the source of the default type does not distinguish
904      implied and unknown default types, then the value
905      <a href="#IMPLIED_DEFAULT"><code>IMPLIED_DEFAULT</code></a>
906      <em class=rfc2119>MUST</em> be used.</p>
907    
908      <div class="note memo">
909      <p>An <a href="#AttributeDefinition"><code>AttributeDefinition</code></a>
910      node created by the
911      <a href="#createAttributeDefinition"><code>createAttributeDefinition</code></a>
912      method has its <a href="#defaultType"><code>defaultType</code></a>
913      attribute set to
914      <a href="#UNKNOWN_DEFAULT"><code>UNKNOWN_DEFAULT</code></a>.</p>
915      </div></dd>
916    </dl>
917    
918    </div>
919    
920    <div class=section id=section-documenttype>
921    <h3>Modifications to the <code id=DocumentType>DocumentType</code>
922    Interface</h3>
923    
924    <p>A <a href="#DocumentType"><code>DocumentType</code></a> interface
925    <em class=rfc2119>MAY</em> contain zero or more
926    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a>
927    nodes in the <code>NodeList</code> object contained in the
928    <code>childNodes</code> attribute of the
929    <a href="#DocumentType"><code>DocumentType</code></a> node.</p>
930    
931    <p>If the <a href="#DocumentType"><code>DocumentType</code></a> node is created
932    during the process to create a <abbr>DOM</abbr> from an <abbr>XML</abbr>
933    document, the <code>NodeList</code> object in the <code>childNodes</code>
934    object <em class=rfc2119>MUST</em> contains the
935    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a>
936    nodes representing the processing instructions in the document type
937    definition of the document processed <span class=ed>@@ ref</span> by
938    the <abbr>XML</abbr> processor.  If the
939    <a href="#DocumentType"><code>DocumentType</code></a> node is marked
940    as read$B!>(Bonly, then all the child nodes <em class=rfc2119>MUST</em>
941    also be marked as read$B!>(Bonly.</p>
942    
943    <p>If a <a href="#DocumentType"><code>DocumentType</code></a> node is created
944    from a document type declaration information item <span class=ed>@@ ref</span>,
945    the <code>NodeList</code> object in the <code>childNodes</code> attribute
946    of the node <em class=rfc2119>MUST</em> contain the
947    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a> nodes
948    created from the processing instruction information items in the list in the
949    [children] property of the document type declaration item in the same
950    order.</p>
951    
952    <p>If a <a href="#DocumentType"><code>DocumentType</code></a> node is mapped to
953    a document type declaration information item, the list in the [children]
954    property <em class=rfc2119>MUST</em> contain the processng instruction
955    information items created from the
956    <a href="#ProcessingInstruction"><code>ProcessingInstruction</code></a> nodes
957    in the <code>NodeList</code> object in the <code>childNodes</code> attribute
958    of the <a href="#DocumentType"><code>DocumentType</code></a> node.</p>
959    
960    <pre class=idl><code>// Modifications to the DocumentType interface
961      attribute DOMString <a href="#publicId">publicId</a>;
962      attribute DOMString <a href="#systemId">systemId</a>;
963    
964      attribute DOMString <a href="#internalSubset">internalSubset</a>;
965    </code></pre>
966    
967    <p>The <code id=publicId>publicId</code> attribute and the
968    <code id=systemId>systemId</code> attribute of
969    <a href="#DocumentType"><code>DocumentType</code></a>,
970    <a href="#Entity"><code>Entity</code></a>, and
971    <a href="#Notation"><code>Notation</code></a> interfaces are no longer
972    read$B!>(Bonly.</p>
973    
974    <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
975    <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
976    exception if the node is read$B!>(Bonly <span class=ed>@@ ref</span>.  
977    Otherwise, it <em class=rfc2119>MUST</em> set the specified value as the value
978    associated to the attribute.  No normalization, relative reference resolution,
979    or lexical validation is performed. <span class=ed>@@ If the new
980    value is <code>null</code>, ...</span></p>
981    
982    <div class="note memo">
983    <p>Setting an invalid identifier might make the node unserializable.
984    Setting a public identifier while leaveing system identifier unspecified
985    would also make the <a href="#DocumentType"><code>DocumentType</code></a>
986    or <a href="#Entity"><code>Entity</code></a> node unserializable.</p>
987    </div>
988    
989    <div class=ed>
990    <p>ISSUE: In HTML5, Firefox 1.5, and Opera 9, not specifying public or system identifier results in empty strings.</p>
991    </div>
992    
993    <p>The <code id=internalSubset>internalSubset</code> attribute of the
994    <a href="#DocumentType"><code>DocumentType</code></a> interface is no longer
995    read$B!>(Bonly.</p>
996    
997    <p>On setting, the attribute <em class=rfc2119>MUST</em> raise a
998    <code>NO_MODIFICATION_ALLOWED_ERR</code> <span class=ed>@@ ref</span>
999    exception if the node is read$B!>(Bonly <span class=ed>@@ ref</span>.  
1000    Otherwise, it <em class=rfc2119>MUST</em> set the specified value as the value
1001    associated to the attribute.  No normalization, or lexical validation is
1002    performed. <span class=ed>@@ If the new value is <code>null</code>,
1003    ...</span></p>
1004    
1005    </div>
1006    
1007  </div>  </div>
1008    
1009    
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