<term>equivalent <replaceable>value-set</replaceable></term>
<listitem>
<para>
- This directive introduces equivalence classes of characters
- and/or strings for sorting purposes only. It resembles the map
- directive, but does not affect search and retrieval indexing,
- but only sorting order under present requests.
+ This directive introduces equivalence classes of strings for
+ searching purposes only. It's a one-to-many
+ conversion that takes place only during search before the map
+ directive kicks in.
</para>
<para>
- For example, <literal>scan.chr</literal> contains the following
- equivalent sorting instructions, which can be uncommented:
+ For example given:
<screen><![CDATA[
- # equivalent æä(ae)
- # equivalent øö(oe)
- # equivalent å(aa)
- # equivalent uü
+ equivalent æä(ae)
]]></screen>
</para>
+ <para>
+ a search for the <literal>äsel</literal> will be be match any of
+ <literal>æsel</literal>, <literal>äsel</literal> and
+ <literal>aesel</literal>.
+ </para>
</listitem></varlistentry>
</variablelist>
</para>