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a/src/doc/user/usermanual.sgml b/src/doc/user/usermanual.sgml
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            state).</para> 
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            state).</para> 
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        </listitem>
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        </listitem>
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        <listitem>
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          <para>The bottom part allows restricting the search results to a
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          <para>The bottom part allows restricting the search results to a
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            sub-tree of the indexed area. If you need to do this often, 
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            sub-tree of the indexed area. You can use the
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            you may think of setting up multiple indexes instead, as the
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            <guilabel>Invert</guilabel> checkbox to search for files not in
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            performance will be much better.</para>
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            the sub-tree instead. If you use directory filtering often and on
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            big subsets of the file system, you may think of setting up
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            multiple indexes instead, as the performance may be
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            better. </para>
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        </listitem>
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      </itemizedlist>
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      </itemizedlist>
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