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| <td valign="middle">unparsed-entity-uri()</td> |
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| <h2>unparsed-entity-uri()</h2> |
| |
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| <a href="#functionality">Functionality</a> |
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| <h3>Functionality</h3> |
| |
| |
| <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> |
| |
| <blockquote class="source"> |
| <pre> |
| <!ENTITY mom-picture SYSTEM "http://www.home.com/mom.jpg" NDATA JPEG> |
| </pre> |
| </blockquote> |
| |
| <p>the expression <code>unparsed-entity-uri('mom-picture')</code> returns an |
| URI for the file <code>mom.jpg</code>.</p> |
| |
| <a name="implementation"></a> |
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| <h3>Implementation</h3> |
| |
| <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> |
| |
| <blockquote class="source"> |
| <pre> |
| public String AbstractTranslet.getUnparsedEntity(String entityName); |
| </pre> |
| </blockquote> |
| |
| <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> |
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