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<section id="data_structures" xmlns:xi="http://www.w3.org/2001/XInclude">
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	    <revision>
		<revnumber>$Revision$</revnumber>
		<date>$Date$</date>
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    <title>Data Structures</title>
    <para>
	There are some data structures that are important and widely used in
	the server. We will describe them in detail in this section.
    </para>
    
    <note>
	<para>
	    There are many more structures and types defined across the server
	    and modules. We will describe only the most important and common
	    data structure here. The rest will be described in other sections
	    if needed.
	</para>
    </note>

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</section>
