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131 lines
3.5 KiB
XML
131 lines
3.5 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.13 $ -->
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<refentry xml:id="function.yaz-ccl-parse" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>yaz_ccl_parse</refname>
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<refpurpose>Invoke CCL Parser</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>bool</type><methodname>yaz_ccl_parse</methodname>
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<methodparam><type>resource</type><parameter>id</parameter></methodparam>
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<methodparam><type>string</type><parameter>query</parameter></methodparam>
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<methodparam><type>array</type><parameter role="reference">result</parameter></methodparam>
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</methodsynopsis>
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<para>
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This function invokes a CCL parser. It converts a given CCL FIND query to
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an RPN query which may be passed to the <function>yaz_search</function>
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function to perform a search.
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</para>
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<para>
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To define a set of valid CCL fields call <function>yaz_ccl_conf</function>
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prior to this function.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>id</parameter></term>
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<listitem>
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<para>
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The connection resource returned by <function>yaz_connect</function>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>query</parameter></term>
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<listitem>
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<para>
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The CCL FIND query.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>result</parameter></term>
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<listitem>
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<para>
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If the function was executed successfully, this will be an array
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containing the valid RPN query under the key <literal>rpn</literal>.
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</para>
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<para>
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Upon failure, three indexes are set in this array to indicate the cause
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of failure:
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<itemizedlist>
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<listitem>
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<para>
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<literal>errorcode</literal> - the CCL error code (integer)
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</para>
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</listitem>
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<listitem>
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<para>
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<literal>errorstring</literal> - the CCL error string
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</para>
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</listitem>
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<listitem>
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<para>
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<literal>errorpos</literal> - approximate position in query of failure
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(integer is character position)
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</para>
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</listitem>
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</itemizedlist>
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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&return.success;
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<example>
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<title>CCL Parsing</title>
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<para>
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We will try to search using CCL. In the example below,
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<literal>$ccl</literal> is a CCL query.
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</para>
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<programlisting role="php">
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<![CDATA[
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<?php
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yaz_ccl_conf($id, $fields); // see example for yaz_ccl_conf
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if (!yaz_ccl_parse($id, $ccl, &$cclresult)) {
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echo 'Error: ' . $cclresult["errorstring"];
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} else {
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$rpn = $cclresult["rpn"];
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yaz_search($id, "rpn", $rpn);
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}
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?>
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]]>
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</programlisting>
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</example>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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