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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
-
- Copyright (C) 1998-2018 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-
-->
<refentry id="fn_xml_tree">
<refmeta>
<refentrytitle>xml_tree</refentrytitle>
<refmiscinfo>xml</refmiscinfo>
</refmeta>
<refnamediv>
<refname>xml_tree</refname>
<refpurpose>Parses an XML fragment and returns the parse tree as nested vectors.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_xml_tree">
<funcprototype id="fproto_xml_tree">
<funcdef><function>xml_tree</function></funcdef>
<paramdef>in <parameter>document</parameter> varchar</paramdef>
<paramdef><optional>in <parameter>parser_mode</parameter> integer</optional></paramdef>
<paramdef><optional>in <parameter>base_uri</parameter> varchar</optional></paramdef>
<paramdef><optional>in <parameter>content_encoding</parameter> varchar</optional></paramdef>
<paramdef><optional>in <parameter>content_language</parameter> varchar</optional></paramdef>
<paramdef><optional>in <parameter>dtd_validator_config</parameter> varchar</optional></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_xml_tree">
<title>Description</title>
<para>This parses the argument, which is expected to be a well formed XML
fragment and returns a parse tree as a structure of nested heterogeneous vectors.</para>
</refsect1>
<refsect1 id="params_xml_tree">
<title>Parameters</title>
<refsect2><title>document </title>
<para>(mandatory) A well formed XML or HTML document</para></refsect2>
<refsect2><title>parser_mode</title>
<para>0, 1 or 2; 0 - XML parser mode, 1 - HTML parser mode, 2 - 'dirty HTML' mode (with quiet recovery after any syntax error)</para></refsect2>
<refsect2><title>base_uri</title>
<para>(optional) in HTML parser mode change all absolute references to relative from given base_uri (http://<host>:<port>/<path>)</para></refsect2>
<refsect2><title>content_encoding</title>
<para>(optional) string with content encoding type of <document> valid is 'ASCII', 'ISO', 'UTF8', 'ISO8859-1', 'LATIN-1'.</para></refsect2>
<refsect2><title>content_language</title>
<para>(optional) - string with language tag of content of <document>; valid names are listed in IETF RFC 1766, default is 'x-any' (it means 'mix of words from various human languages).</para></refsect2>
<refsect2><title>dtd_validator_config</title>
<para>configuration string for DTD validator, default is empty string meaning that DTD validator should be fully disabled.
See <link linkend="dtd_config">Configuration Options of the DTD Validator</link> for details.</para></refsect2>
</refsect1>
<refsect1 id="ret_xml_tree"><title>Return Types</title><para>vector of vectors representing the parsed tree of XML.</para></refsect1>
<!--
<refsect1 id="errors_xml_tree"><title>Errors</title>
<table><title>Errors signalled by </title>
<tgroup cols="4">
<thead>
<row><entry>SQL State</entry><entry>Error Code</entry><entry>Error Text</entry><entry>Description</entry></row>
</thead>
<tbody>
<row>
<entry><errorcode></errorcode></entry>
<entry><errorcode></errorcode></entry>
<entry><errorname></errorname></entry>
<entry></entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
-->
<refsect1 id="examples_xml_tree"><title>Examples</title>
<example id="ex_xml_tree"><title>Making an XML tree</title>
<screen>declare tree any;
tree := xml_tree (file_to_string ('doc.html'), 1,
'http://localhost.localdomain/', 'ISO');
...
tree := xml_tree (file_to_string ('doc.xml'));
</screen>
</example>
</refsect1>
<refsect1 id="seealso_xml_tree"><title>See Also</title>
<para><link linkend="fn_xslt"><function>xslt</function></link>,
<link linkend="fn_xml_uri_get"><function>xml_uri_get</function></link>,
<link linkend="fn_xml_validate_dtd"><function>xml_validate_dtd</function></link>.</para>
</refsect1>
</refentry>
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