+ <term>index: <replaceable>filename</replaceable></term>
+ <listitem>
+ <para>
+ Defines the filename which holds fields structure
+ definitions. If omitted, the file <filename>default.idx</filename>
+ is read.
+ Refer to <xref linkend="default-idx-file"/> for
+ more information.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>