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<book id="avp" xmlns:xi="http://www.w3.org/2001/XInclude">
    <bookinfo>
	<title>The AVP module</title>
	<authorgroup>
	    <author>
		<firstname>Jiri</firstname>
		<surname>Kuthan</surname>
		<affiliation><orgname>FhG Fokus</orgname></affiliation>
		<email>jiri@iptel.org</email>
	    </author>
		<author>
		<firstname>Michal</firstname>
		<surname>Matyska</surname>
		<affiliation><orgname>iptel</orgname></affiliation>
		<email>michal@iptel.org</email>
		</author>
	</authorgroup>
	<copyright>
	    <year>2004</year>
	    <year>2005</year>
	    <holder>FhG FOKUS</holder>
		<year>2006</year>
		<holder>iptelorg GmbH</holder>
	</copyright>
    </bookinfo>

    <title>The AVP Module</title>

    <chapter>
	<title>Admin Guide</title>
    <section>
	<title>Overview</title>
	<para>
	    This module contains several functions that can be used to
	    manipulate the contents of AVPs (Attribute-Value pairs). The AVPs
	    are variables attached to the SIP message being processed. Each
	    variable has its name and value. AVPs can be used to store
	    arbitrary data or as a means of inter-module communication.
	</para>
	<para>
	    You may also want to check the <emphasis>avpops</emphasis> module which is more flexible
	    and contains more functions. In future &kamailio; releases the avp module
	    will be probably deprecated in favor of avpops module.
	</para>
    </section>

    <xi:include href="avp_functions.xml"/>
    <xi:include href="avp_params.xml"/>
    </chapter>
</book>
