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<title>keys: interface for the key matching used in key() and template matches.</title>
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<span class="refentrytitle">keys</span>
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<p>keys - interface for the key matching used in key() and template matches.</p>
<p>implementation of the key mechanims. </p>
<p>Author(s): Daniel Veillard </p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">#define <a href="#NODE_IS_KEYED">NODE_IS_KEYED</a>;
void <a href="#xsltInitCtxtKeys">xsltInitCtxtKeys</a> (<a href="libxslt-xsltInternals.html#xsltTransformContextPtr">xsltTransformContextPtr</a> ctxt, <br/> <a href="libxslt-xsltInternals.html#xsltDocumentPtr">xsltDocumentPtr</a> idoc);
void <a href="#xsltFreeKeys">xsltFreeKeys</a> (<a href="libxslt-xsltInternals.html#xsltStylesheetPtr">xsltStylesheetPtr</a> style);
xmlNodeSetPtr <a href="#xsltGetKey">xsltGetKey</a> (<a href="libxslt-xsltInternals.html#xsltTransformContextPtr">xsltTransformContextPtr</a> ctxt, <br/> const xmlChar * name, <br/> const xmlChar * nameURI, <br/> const xmlChar * value);
void <a href="#xsltFreeDocumentKeys">xsltFreeDocumentKeys</a> (<a href="libxslt-xsltInternals.html#xsltDocumentPtr">xsltDocumentPtr</a> idoc);
int <a href="#xsltAddKey">xsltAddKey</a> (<a href="libxslt-xsltInternals.html#xsltStylesheetPtr">xsltStylesheetPtr</a> style, <br/> const xmlChar * name, <br/> const xmlChar * nameURI, <br/> const xmlChar * match, <br/> const xmlChar * use, <br/> xmlNodePtr inst);
</pre>
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<div class="refsect1" lang="en">
<h2>Description</h2>
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<div class="refsect1" lang="en">
<h2>Details</h2>
<div class="refsect2" lang="en">
<div class="refsect2" lang="en"><h3><a name="NODE_IS_KEYED">Macro </a>NODE_IS_KEYED</h3><pre class="programlisting">#define <a href="#NODE_IS_KEYED">NODE_IS_KEYED</a>;
</pre><p>check for bit 15 set</p>
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<div class="refsect2" lang="en"><h3><a name="xsltAddKey"/>xsltAddKey ()</h3><pre class="programlisting">int xsltAddKey (<a href="libxslt-xsltInternals.html#xsltStylesheetPtr">xsltStylesheetPtr</a> style, <br/> const xmlChar * name, <br/> const xmlChar * nameURI, <br/> const xmlChar * match, <br/> const xmlChar * use, <br/> xmlNodePtr inst)<br/>
</pre><p>add a key definition to a stylesheet</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>style</tt></i>:</span></td><td>an XSLT stylesheet</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the key name or NULL</td></tr><tr><td><span class="term"><i><tt>nameURI</tt></i>:</span></td><td>the name URI or NULL</td></tr><tr><td><span class="term"><i><tt>match</tt></i>:</span></td><td>the match value</td></tr><tr><td><span class="term"><i><tt>use</tt></i>:</span></td><td>the use value</td></tr><tr><td><span class="term"><i><tt>inst</tt></i>:</span></td><td>the key instruction</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, and -1 in case of failure.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xsltFreeDocumentKeys"/>xsltFreeDocumentKeys ()</h3><pre class="programlisting">void xsltFreeDocumentKeys (<a href="libxslt-xsltInternals.html#xsltDocumentPtr">xsltDocumentPtr</a> idoc)<br/>
</pre><p>Free the keys associated to a document</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>idoc</tt></i>:</span></td><td>a XSLT document</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xsltFreeKeys"/>xsltFreeKeys ()</h3><pre class="programlisting">void xsltFreeKeys (<a href="libxslt-xsltInternals.html#xsltStylesheetPtr">xsltStylesheetPtr</a> style)<br/>
</pre><p>Free up the memory used by XSLT keys in a stylesheet</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>style</tt></i>:</span></td><td>an XSLT stylesheet</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xsltGetKey"/>xsltGetKey ()</h3><pre class="programlisting">xmlNodeSetPtr xsltGetKey (<a href="libxslt-xsltInternals.html#xsltTransformContextPtr">xsltTransformContextPtr</a> ctxt, <br/> const xmlChar * name, <br/> const xmlChar * nameURI, <br/> const xmlChar * value)<br/>
</pre><p>Looks up a key of the in current source doc (the document info on @ctxt->document). Computes the key if not already done for the current source doc.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XSLT transformation context</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the key name or NULL</td></tr><tr><td><span class="term"><i><tt>nameURI</tt></i>:</span></td><td>the name URI or NULL</td></tr><tr><td><span class="term"><i><tt>value</tt></i>:</span></td><td>the key value to look for</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the nodeset resulting from the query or NULL</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xsltInitCtxtKeys"/>xsltInitCtxtKeys ()</h3><pre class="programlisting">void xsltInitCtxtKeys (<a href="libxslt-xsltInternals.html#xsltTransformContextPtr">xsltTransformContextPtr</a> ctxt, <br/> <a href="libxslt-xsltInternals.html#xsltDocumentPtr">xsltDocumentPtr</a> idoc)<br/>
</pre><p>Computes all the keys tables for the current input document. Should be done before global varibales are initialized. NOTE: Not used anymore in the refactored code.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XSLT transformation context</td></tr><tr><td><span class="term"><i><tt>idoc</tt></i>:</span></td><td>a document info</td></tr></tbody></table></div></div>
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