File: xsl_unparsed_design.xml

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<?xml version="1.0" standalone="no"?>
<!DOCTYPE s1 SYSTEM "../../style/dtd/document.dtd">
<!--
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
-->
<!-- $Id: xsl_unparsed_design.xml 337884 2004-02-17 19:29:35Z minchau $ -->
  <s1 title="unparsed-entity-uri()">

  <ul>
    <li><link anchor="functionality">Functionality</link></li>
    <li><link anchor="implementation">Implementation</link></li>
  </ul>
  
  <anchor name="functionality"/>
  <s2 title="Functionality">


  <p>The <code>unparsed-entity-uri()</code> function gives access to declarations
  of unparsed entities in the DTD of the source document. If the DTD contains
  the declaration:</p>

  <source>
    &lt;!ENTITY mom-picture SYSTEM "http://www.home.com/mom.jpg" NDATA JPEG&gt;
  </source>

  <p>the expression <code>unparsed-entity-uri('mom-picture')</code> returns an
  URI for the file <code>mom.jpg</code>.</p>

  </s2><anchor name="implementation"/>
  <s2 title="Implementation">

  <p>Unparsed entities must be gathered from the XML input document at the time
  when the DOM is built. To achieve this our parser must parse the document DTD
  (if any) and store all data of type NDATA (not XML data) in a
  hashtable in the AbstractTranslet object. All the compiled code for this
  function needs to do is call a method in the translet for retrieving the
  value for the requested element:</p>

  <source>
    public String AbstractTranslet.getUnparsedEntity(String entityName);
  </source>

  <p>The translet will use the supplied <code>entityName</code> to look up the
  value in the hashtable and then leave the string value on the stack for the
  element that called <code>lang()</code>.</p>
  </s2>
</s1>