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    </style><title>Module xpath from libxml2</title></head><body bgcolor="#8b7765" text="#000000" link="#a06060" vlink="#000000"><table border="0" width="100%" cellpadding="5" cellspacing="0" align="center"><tr><td width="120"><a href="http://swpat.ffii.org/"><img src="../epatents.png" alt="Action against software patents" /></a></td><td width="180"><a href="http://www.gnome.org/"><img src="../gnome2.png" alt="Gnome2 Logo" /></a><a href="http://www.w3.org/Status"><img src="../w3c.png" alt="W3C Logo" /></a><a href="http://www.redhat.com/"><img src="../redhat.gif" alt="Red Hat Logo" /></a><div align="left"><a href="http://xmlsoft.org/"><img src="../Libxml2-Logo-180x168.gif" alt="Made with Libxml2 Logo" /></a></div></td><td><table border="0" width="90%" cellpadding="2" cellspacing="0" align="center" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3" bgcolor="#fffacd"><tr><td align="center"><h1></h1><h2>Module xpath from libxml2</h2></td></tr></table></td></tr></table></td></tr></table><table border="0" cellpadding="4" cellspacing="0" width="100%" align="center"><tr><td bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="2" width="100%"><tr><td valign="top" width="200" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3"><tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>API Menu</b></center></td></tr><tr><td bgcolor="#fffacd"><form action="../search.php" enctype="application/x-www-form-urlencoded" method="get"><input name="query" type="text" size="20" value="" /><input name="submit" type="submit" value="Search ..." /></form><ul><li><a style="font-weight:bold" href="../index.html">Main Menu</a></li><li><a style="font-weight:bold" href="../docs.html">Developer Menu</a></li><li><a style="font-weight:bold" href="../examples/index.html">Code Examples</a></li><li><a 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bgcolor="#fffacd"><ul><li><a href="http://mail.gnome.org/archives/xml/">Mail archive</a></li><li><a href="http://xmlsoft.org/XSLT/">XSLT libxslt</a></li><li><a href="http://phd.cs.unibo.it/gdome2/">DOM gdome2</a></li><li><a href="http://www.aleksey.com/xmlsec/">XML-DSig xmlsec</a></li><li><a href="ftp://xmlsoft.org/">FTP</a></li><li><a href="http://www.zlatkovic.com/projects/libxml/">Windows binaries</a></li><li><a href="http://opencsw.org/packages/libxml2">Solaris binaries</a></li><li><a href="http://www.explain.com.au/oss/libxml2xslt.html">MacOsX binaries</a></li><li><a href="http://codespeak.net/lxml/">lxml Python bindings</a></li><li><a href="http://cpan.uwinnipeg.ca/dist/XML-LibXML">Perl bindings</a></li><li><a href="http://libxmlplusplus.sourceforge.net/">C++ bindings</a></li><li><a href="http://www.zend.com/php5/articles/php5-xmlphp.php#Heading4">PHP bindings</a></li><li><a href="http://sourceforge.net/projects/libxml2-pas/">Pascal bindings</a></li><li><a href="http://libxml.rubyforge.org/">Ruby bindings</a></li><li><a href="http://tclxml.sourceforge.net/">Tcl bindings</a></li><li><a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Bug Tracker</a></li></ul></td></tr></table></td></tr></table></td><td valign="top" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%"><tr><td><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table border="0" cellpadding="3" cellspacing="1" width="100%"><tr><td bgcolor="#fffacd"><table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="libxml-xmlwriter.html"><img src="left.png" width="24" height="24" border="0" alt="Prev" /></a></td><th align="left"><a href="libxml-xmlwriter.html">xmlwriter</a></th><td><a accesskey="u" href="index.html"><img src="up.png" width="24" height="24" border="0" alt="Up" /></a></td><th align="left"><a href="index.html">API documentation</a></th><td><a accesskey="h" href="../index.html"><img src="home.png" width="24" height="24" border="0" alt="Home" /></a></td><th align="center"><a href="../index.html">The XML C parser and toolkit of Gnome</a></th><th align="right"><a href="libxml-xpathInternals.html">xpathInternals</a></th><td><a accesskey="n" href="libxml-xpathInternals.html"><img src="right.png" width="24" height="24" border="0" alt="Next" /></a></td></tr></table><p>API for the XML Path Language implementation  XML Path Language implementation XPath is a language for addressing parts of an XML document, designed to be used by both XSLT and XPointer</p><h2>Table of Contents</h2><pre class="programlisting">#define <a href="#XML_XPATH_CHECKNS">XML_XPATH_CHECKNS</a></pre><pre class="programlisting">#define <a href="#XML_XPATH_NOVAR">XML_XPATH_NOVAR</a></pre><pre class="programlisting">#define <a href="#xmlXPathNodeSetGetLength">xmlXPathNodeSetGetLength</a></pre><pre class="programlisting">#define <a href="#xmlXPathNodeSetIsEmpty">xmlXPathNodeSetIsEmpty</a></pre><pre class="programlisting">#define <a href="#xmlXPathNodeSetItem">xmlXPathNodeSetItem</a></pre><pre class="programlisting">Structure <a href="#xmlNodeSet">xmlNodeSet</a><br />struct _xmlNodeSet    </style><title>Module xpath from libxml2</title></head><body bgcolor="#8b7765" text="#000000" link="#a06060" vlink="#000000"><table border="0" width="100%" cellpadding="5" cellspacing="0" align="center"><tr><td width="120"><a href="http://swpat.ffii.org/"><img src="../epatents.png" alt="Action against software patents" /></a></td><td width="180"><a href="http://www.gnome.org/"><img src="../gnome2.png" alt="Gnome2 Logo" /></a><a href="http://www.w3.org/Status"><img src="../w3c.png" alt="W3C Logo" /></a><a href="http://www.redhat.com/"><img src="../redhat.gif" alt="Red Hat Logo" /></a><div align="left"><a href="http://xmlsoft.org/"><img src="../Libxml2-Logo-180x168.gif" alt="Made with Libxml2 Logo" /></a></div></td><td><table border="0" width="90%" cellpadding="2" cellspacing="0" align="center" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3" bgcolor="#fffacd"><tr><td align="center"><h1></h1><h2>Module xpath from libxml2</h2></td></tr></table></td></tr></table></td></tr></table><table border="0" cellpadding="4" cellspacing="0" width="100%" align="center"><tr><td bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="2" width="100%"><tr><td valign="top" width="200" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3"><tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>API Menu</b></center></td></tr><tr><td bgcolor="#fffacd"><form action="../search.php" enctype="application/x-www-form-urlencoded" method="get"><input name="query" type="text" size="20" value="" /><input name="submit" type="submit" value="Search ..." /></form><ul><li><a style="font-weight:bold" href="../index.html">Main Menu</a></li><li><a style="font-weight:bold" href="../docs.html">Developer Menu</a></li><li><a style="font-weight:bold" href="../examples/index.html">Code Examples</a></li><li><a style="font-weight:bold" href="index.html">API Menu</a></li><li><a href="libxml-parser.html">Parser API</a></li><li><a href="libxml-tree.html">Tree API</a></li><li><a href="libxml-xmlreader.html">Reader API</a></li><li><a href="../guidelines.html">XML Guidelines</a></li><li><a href="../ChangeLog.html">ChangeLog</a></li></ul></td></tr></table><table width="100%" border="0" cellspacing="1" cellpadding="3"><tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>API Indexes</b></center></td></tr><tr><td bgcolor="#fffacd"><ul><li><a href="../APIchunk0.html">Alphabetic</a></li><li><a href="../APIconstructors.html">Constructors</a></li><li><a href="../APIfunctions.html">Functions/Types</a></li><li><a href="../APIfiles.html">Modules</a></li><li><a href="../APIsymbols.html">Symbols</a></li></ul></td></tr></table><table width="100%" border="0" cellspacing="1" cellpadding="3"><tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Related links</b></center></td></tr><tr><td bgcolor="#fffacd"><ul><li><a href="http://mail.gnome.org/archives/xml/">Mail archive</a></li><li><a href="http://xmlsoft.org/XSLT/">XSLT libxslt</a></li><li><a href="http://phd.cs.unibo.it/gdome2/">DOM gdome2</a></li><li><a href="http://www.aleksey.com/xmlsec/">XML-DSig xmlsec</a></li><li><a href="ftp://xmlsoft.org/">FTP</a></li><li><a href="http://www.zlatkovic.com/projects/libxml/">Windows binaries</a></li><li><a href="http://opencsw.org/packages/libxml2">Solaris binaries</a></li><li><a href="http://www.explain.com.au/oss/libxml2xslt.html">MacOsX binaries</a></li><li><a href="http://lxml.de/">lxml Python bindings</a></li><li><a href="http://cpan.uwinnipeg.ca/dist/XML-LibXML">Perl bindings</a></li><li><a href="http://libxmlplusplus.sourceforge.net/">C++ bindings</a></li><li><a href="http://www.zend.com/php5/articles/php5-xmlphp.php#Heading4">PHP bindings</a></li><li><a href="http://sourceforge.net/projects/libxml2-pas/">Pascal bindings</a></li><li><a href="http://libxml.rubyforge.org/">Ruby bindings</a></li><li><a href="http://tclxml.sourceforge.net/">Tcl bindings</a></li><li><a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Bug Tracker</a></li></ul></td></tr></table></td></tr></table></td><td valign="top" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%"><tr><td><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table border="0" cellpadding="3" cellspacing="1" width="100%"><tr><td bgcolor="#fffacd"><table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="libxml-xmlwriter.html"><img src="left.png" width="24" height="24" border="0" alt="Prev" /></a></td><th align="left"><a href="libxml-xmlwriter.html">xmlwriter</a></th><td><a accesskey="u" href="index.html"><img src="up.png" width="24" height="24" border="0" alt="Up" /></a></td><th align="left"><a href="index.html">API documentation</a></th><td><a accesskey="h" href="../index.html"><img src="home.png" width="24" height="24" border="0" alt="Home" /></a></td><th align="center"><a href="../index.html">The XML C parser and toolkit of Gnome</a></th><th align="right"><a href="libxml-xpathInternals.html">xpathInternals</a></th><td><a accesskey="n" href="libxml-xpathInternals.html"><img src="right.png" width="24" height="24" border="0" alt="Next" /></a></td></tr></table><p>API for the XML Path Language implementation  XML Path Language implementation XPath is a language for addressing parts of an XML document, designed to be used by both XSLT and XPointer</p><h2>Table of Contents</h2><pre class="programlisting">#define <a href="#XML_XPATH_CHECKNS">XML_XPATH_CHECKNS</a></pre><pre class="programlisting">#define <a href="#XML_XPATH_NOVAR">XML_XPATH_NOVAR</a></pre><pre class="programlisting">#define <a href="#xmlXPathNodeSetGetLength">xmlXPathNodeSetGetLength</a></pre><pre class="programlisting">#define <a href="#xmlXPathNodeSetIsEmpty">xmlXPathNodeSetIsEmpty</a></pre><pre class="programlisting">#define <a href="#xmlXPathNodeSetItem">xmlXPathNodeSetItem</a></pre><pre class="programlisting">Structure <a href="#xmlNodeSet">xmlNodeSet</a><br />struct _xmlNodeSet
 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlNodeSet">xmlNodeSet</a> * <a name="xmlNodeSetPtr" id="xmlNodeSetPtr">xmlNodeSetPtr</a>  </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlNodeSet">xmlNodeSet</a> * <a name="xmlNodeSetPtr" id="xmlNodeSetPtr">xmlNodeSetPtr</a>
 </pre><pre class="programlisting">Structure <a href="#xmlXPathAxis">xmlXPathAxis</a><br />struct _xmlXPathAxis  </pre><pre class="programlisting">Structure <a href="#xmlXPathAxis">xmlXPathAxis</a><br />struct _xmlXPathAxis
 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathAxis">xmlXPathAxis</a> * <a name="xmlXPathAxisPtr" id="xmlXPathAxisPtr">xmlXPathAxisPtr</a>  </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathAxis">xmlXPathAxis</a> * <a name="xmlXPathAxisPtr" id="xmlXPathAxisPtr">xmlXPathAxisPtr</a>
Line 81  void <a href="#xmlXPathFunction">xmlXPathFunction</a>  Line 81  void <a href="#xmlXPathFunction">xmlXPathFunction</a> 
 <pre class="programlisting">int <a href="#xmlXPathIsInf">xmlXPathIsInf</a>                      (double val)</pre>  <pre class="programlisting">int <a href="#xmlXPathIsInf">xmlXPathIsInf</a>                      (double val)</pre>
 <pre class="programlisting">int <a href="#xmlXPathIsNaN">xmlXPathIsNaN</a>                      (double val)</pre>  <pre class="programlisting">int <a href="#xmlXPathIsNaN">xmlXPathIsNaN</a>                      (double val)</pre>
 <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a>       <a href="#xmlXPathNewContext">xmlXPathNewContext</a>    (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)</pre>  <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a>       <a href="#xmlXPathNewContext">xmlXPathNewContext</a>    (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)</pre>
   <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> <a href="#xmlXPathNodeEval">xmlXPathNodeEval</a>        (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node, <br />                                               const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * str, <br />                                                 <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctx)</pre>
 <pre class="programlisting"><a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> <a href="#xmlXPathNodeSetCreate">xmlXPathNodeSetCreate</a>      (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> val)</pre>  <pre class="programlisting"><a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> <a href="#xmlXPathNodeSetCreate">xmlXPathNodeSetCreate</a>      (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> val)</pre>
 <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> <a href="#xmlXPathObjectCopy">xmlXPathObjectCopy</a>    (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>  <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> <a href="#xmlXPathObjectCopy">xmlXPathObjectCopy</a>    (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>
 <pre class="programlisting">long        <a href="#xmlXPathOrderDocElems">xmlXPathOrderDocElems</a>              (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)</pre>  <pre class="programlisting">long        <a href="#xmlXPathOrderDocElems">xmlXPathOrderDocElems</a>              (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)</pre>
   <pre class="programlisting">int <a href="#xmlXPathSetContextNode">xmlXPathSetContextNode</a>            (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node, <br />                                       <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctx)</pre>
 <pre class="programlisting">Function type: <a href="#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a>  <pre class="programlisting">Function type: <a href="#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a>
 <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>     <a href="#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a>    (void * ctxt, <br />                                                     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br />                                                        const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns_uri)  <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>     <a href="#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a>    (void * ctxt, <br />                                                     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br />                                                        const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns_uri)
 </pre>  </pre>
Line 166  The content of this structure is not made public by th Line 168  The content of this structure is not made public by th
     <a name="XPATH_ENCODING_ERROR" id="XPATH_ENCODING_ERROR">XPATH_ENCODING_ERROR</a> = 20      <a name="XPATH_ENCODING_ERROR" id="XPATH_ENCODING_ERROR">XPATH_ENCODING_ERROR</a> = 20
     <a name="XPATH_INVALID_CHAR_ERROR" id="XPATH_INVALID_CHAR_ERROR">XPATH_INVALID_CHAR_ERROR</a> = 21      <a name="XPATH_INVALID_CHAR_ERROR" id="XPATH_INVALID_CHAR_ERROR">XPATH_INVALID_CHAR_ERROR</a> = 21
     <a name="XPATH_INVALID_CTXT" id="XPATH_INVALID_CTXT">XPATH_INVALID_CTXT</a> = 22      <a name="XPATH_INVALID_CTXT" id="XPATH_INVALID_CTXT">XPATH_INVALID_CTXT</a> = 22
       <a name="XPATH_STACK_ERROR" id="XPATH_STACK_ERROR">XPATH_STACK_ERROR</a> = 23
       <a name="XPATH_FORBID_VARIABLE_ERROR" id="XPATH_FORBID_VARIABLE_ERROR">XPATH_FORBID_VARIABLE_ERROR</a> = 24
 }  }
 </pre><h3><a name="xmlXPathFunct" id="xmlXPathFunct">Structure xmlXPathFunct</a></h3><pre class="programlisting">Structure xmlXPathFunct<br />struct _xmlXPathFunct {  </pre><h3><a name="xmlXPathFunct" id="xmlXPathFunct">Structure xmlXPathFunct</a></h3><pre class="programlisting">Structure xmlXPathFunct<br />struct _xmlXPathFunct {
     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name    : the function name      const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name    : the function name
Line 204  The content of this structure is not made public by th Line 208  The content of this structure is not made public by th
     <a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a>     comp    : the precompiled expression      <a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a>     comp    : the precompiled expression
     int xptr    : it this an XPointer expression      int xptr    : it this an XPointer expression
     <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a>        ancestor        : used for walking preceding axis      <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a>        ancestor        : used for walking preceding axis
       int valueFrame      : used to limit Pop on the stack
 }</pre><h3><a name="xmlXPathType" id="xmlXPathType">Structure xmlXPathType</a></h3><pre class="programlisting">Structure xmlXPathType<br />struct _xmlXPathType {  }</pre><h3><a name="xmlXPathType" id="xmlXPathType">Structure xmlXPathType</a></h3><pre class="programlisting">Structure xmlXPathType<br />struct _xmlXPathType {
     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name    : the type name      const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name    : the type name
     <a href="libxml-xpath.html#xmlXPathConvertFunc">xmlXPathConvertFunc</a>     func    : the conversion function      <a href="libxml-xpath.html#xmlXPathConvertFunc">xmlXPathConvertFunc</a>     func    : the conversion function
Line 295  void xmlXPathFunction  (<a href="libxml-xpath.html#xml Line 300  void xmlXPathFunction  (<a href="libxml-xpath.html#xml
 </pre><p>Provides a portable isnan() function to detect whether a double is a NotaNumber. Based on trio code http://sourceforge.net/projects/ctrio/</p>  </pre><p>Provides a portable isnan() function to detect whether a double is a NotaNumber. Based on trio code http://sourceforge.net/projects/ctrio/</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>a double value</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if the value is a NaN, 0 otherwise</td></tr></tbody></table></div><h3><a name="xmlXPathNewContext" id="xmlXPathNewContext"></a>Function: xmlXPathNewContext</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a>    xmlXPathNewContext      (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)<br />  <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>a double value</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if the value is a NaN, 0 otherwise</td></tr></tbody></table></div><h3><a name="xmlXPathNewContext" id="xmlXPathNewContext"></a>Function: xmlXPathNewContext</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a>    xmlXPathNewContext      (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)<br />
 </pre><p>Create a new <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a></p>  </pre><p>Create a new <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a></p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>doc</tt></i>:</span></td><td>the XML document</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a> just allocated. The caller will need to free it.</td></tr></tbody></table></div><h3><a name="xmlXPathNodeSetCreate" id="xmlXPathNodeSetCreate"></a>Function: xmlXPathNodeSetCreate</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a>   xmlXPathNodeSetCreate   (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> val)<br /><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>doc</tt></i>:</span></td><td>the XML document</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a> just allocated. The caller will need to free it.</td></tr></tbody></table></div><h3><a name="xmlXPathNodeEval" id="xmlXPathNodeEval"></a>Function: xmlXPathNodeEval</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>  xmlXPathNodeEval        (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node, <br />                                               const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * str, <br />                                                 <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctx)<br />
 </pre><p>Evaluate the XPath Location Path in the given context. The node 'node' is set as the context node. The context node is not restored.</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>node</tt></i>:</span></td><td>the node to to use as the context node</td></tr><tr><td><span class="term"><i><tt>str</tt></i>:</span></td><td>the XPath expression</td></tr><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the XPath context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> resulting from the evaluation or NULL. the caller has to free the object.</td></tr></tbody></table></div><h3><a name="xmlXPathNodeSetCreate" id="xmlXPathNodeSetCreate"></a>Function: xmlXPathNodeSetCreate</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a>   xmlXPathNodeSetCreate   (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> val)<br />
 </pre><p>Create a new <a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> of type double and of value @val</p>  </pre><p>Create a new <a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> of type double and of value @val</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>an initial xmlNodePtr, or NULL</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created object.</td></tr></tbody></table></div><h3><a name="xmlXPathObjectCopy" id="xmlXPathObjectCopy"></a>Function: xmlXPathObjectCopy</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathObjectCopy      (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)<br />  <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>an initial xmlNodePtr, or NULL</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created object.</td></tr></tbody></table></div><h3><a name="xmlXPathObjectCopy" id="xmlXPathObjectCopy"></a>Function: xmlXPathObjectCopy</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathObjectCopy      (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)<br />
 </pre><p>allocate a new copy of a given object</p>  </pre><p>allocate a new copy of a given object</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>the original object</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created object.</td></tr></tbody></table></div><h3><a name="xmlXPathOrderDocElems" id="xmlXPathOrderDocElems"></a>Function: xmlXPathOrderDocElems</h3><pre class="programlisting">long  xmlXPathOrderDocElems           (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)<br />  <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>the original object</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created object.</td></tr></tbody></table></div><h3><a name="xmlXPathOrderDocElems" id="xmlXPathOrderDocElems"></a>Function: xmlXPathOrderDocElems</h3><pre class="programlisting">long  xmlXPathOrderDocElems           (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)<br />
 </pre><p>Call this routine to speed up XPath computation on static documents. This stamps all the element nodes with the document order Like for line information, the order is kept in the element-&gt;content field, the value stored is actually - the node number (starting at -1) to be able to differentiate from line numbers.</p>  </pre><p>Call this routine to speed up XPath computation on static documents. This stamps all the element nodes with the document order Like for line information, the order is kept in the element-&gt;content field, the value stored is actually - the node number (starting at -1) to be able to differentiate from line numbers.</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>doc</tt></i>:</span></td><td>an input document</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of elements found in the document or -1 in case of error.</td></tr></tbody></table></div><h3><a name="xmlXPathVariableLookupFunc" id="xmlXPathVariableLookupFunc"></a>Function type: xmlXPathVariableLookupFunc</h3><pre class="programlisting">Function type: xmlXPathVariableLookupFunc<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>doc</tt></i>:</span></td><td>an input document</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of elements found in the document or -1 in case of error.</td></tr></tbody></table></div><h3><a name="xmlXPathSetContextNode" id="xmlXPathSetContextNode"></a>Function: xmlXPathSetContextNode</h3><pre class="programlisting">int    xmlXPathSetContextNode          (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node, <br />                                       <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctx)<br />
 </pre><p>Sets 'node' as the context node. The node must be in the same document as that associated with the context.</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>node</tt></i>:</span></td><td>the node to to use as the context node</td></tr><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the XPath context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error or 0 if successful</td></tr></tbody></table></div><h3><a name="xmlXPathVariableLookupFunc" id="xmlXPathVariableLookupFunc"></a>Function type: xmlXPathVariableLookupFunc</h3><pre class="programlisting">Function type: xmlXPathVariableLookupFunc
 <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>     xmlXPathVariableLookupFunc      (void * ctxt, <br />                                                     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br />                                                        const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns_uri)  <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>     xmlXPathVariableLookupFunc      (void * ctxt, <br />                                                     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br />                                                        const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns_uri)
 </pre><p>Prototype for callbacks used to plug variable lookup in the XPath engine.</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 XPath context</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>name of the variable</td></tr><tr><td><span class="term"><i><tt>ns_uri</tt></i>:</span></td><td>the namespace name hosting this variable</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the XPath object value or NULL if not found.</td></tr></tbody></table></div><br />  </pre><p>Prototype for callbacks used to plug variable lookup in the XPath engine.</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 XPath context</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>name of the variable</td></tr><tr><td><span class="term"><i><tt>ns_uri</tt></i>:</span></td><td>the namespace name hosting this variable</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the XPath object value or NULL if not found.</td></tr></tbody></table></div><br />
 <p><a href="../bugs.html">Daniel Veillard</a></p></td></tr></table></td></tr></table></td></tr></table></td></tr></table></td></tr></table></body></html>  <p><a href="../bugs.html">Daniel Veillard</a></p></td></tr></table></td></tr></table></td></tr></table></td></tr></table></td></tr></table></body></html>
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  Added in v.1.1.1.3

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