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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="xpf_system_property">
<refmeta>
<refentrytitle>system-property</refentrytitle>
<refmiscinfo>XPATH</refmiscinfo>
</refmeta>
<refnamediv>
<refname>system-property</refname>
<refpurpose>Returns a value of the system property identified by the name</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="xpf_syn_system_property">
<funcprototype id="xpf_proto_system_property">
<funcdef>object <function>system-property</function></funcdef>
<paramdef><parameter>property_qname</parameter> varchar</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="xpf_desc_system_property"><title>Description</title>
<para>
The function returns an object representing the value of the system property identified by the name.
If there is no such system property, the empty string is returned.
</para>
</refsect1>
<refsect1 id="xpf_params_system_property"><title>Parameters</title>
<refsect2><title>property_qname</title>
<para>a string that is a QName. The QName is expanded into a name using the namespace declarations in scope for the expression.</para></refsect2>
</refsect1>
<refsect1 id="xpf_ret_system_property"><title>Return Types</title><para>String or double precision number.</para></refsect1>
<refsect1 id="xpf_examples_system_property"><title>Examples</title>
<example id="xpf_ex_system_property_1"><title>xsl:version</title>
<para>xsl:version is a number giving the version of XSLT implemented by the processor; this version returns 1.0.</para>
<screen>[xmlns:xsl='http://www.w3.org/1999/XSL/Transform'] system-property('xsl:version')</screen>
</example>
<example id="xpf_ex_system_property_2"><title>xsl:vendor</title>
<para>xsl:vendor is a string identifying the vendor of the XSLT processor; this version returns 'OpenLink Software'.</para>
<screen>[xmlns:xsl='http://www.w3.org/1999/XSL/Transform'] system-property('xsl:vendor')</screen>
</example>
<example id="xpf_ex_system_property_3"><title>xsl:vendor-url</title>
<para>xsl:vendor-url is a string containing a URL identifying the vendor of the XSLT processor; this version returns 'http://www.openlinksw.com'.</para>
<screen>[xmlns:xsl='http://www.w3.org/1999/XSL/Transform'] system-property('xsl:vendor-url')</screen>
</example>
<example id="xpf_ex_system_property_4"><title>xsl:product-name</title>
<para>xsl:product-name is a string containing a name of XSLT processor; this version returns 'OpenLink Virtuoso Server'.</para>
<screen>[xmlns:xsl='http://www.w3.org/1999/XSL/Transform'] system-property('xsl:product-name')</screen>
</example>
<example id="xpf_ex_system_property_5"><title>xsl:product-version</title>
<para>xsl:product-version is a string containing a version of XSLT processor implementation; the returned string may depend on OS, hardware and other parameters of installation.</para>
<screen>[xmlns:xsl='http://www.w3.org/1999/XSL/Transform'] system-property('xsl:product-version')</screen>
</example>
</refsect1>
<refsect1 id="xpf_seealso_system_property"><title>See Also</title>
<para><link linkend="xpf_function_available"><function>function_available</function>()</link></para>
</refsect1>
</refentry>
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