-<!-- $PostgreSQL: pgsql/doc/src/sgml/xindex.sgml,v 1.50 2006/09/21 15:03:53 teodor Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/xindex.sgml,v 1.51 2006/09/21 15:09:38 teodor Exp $ -->
<sect1 id="xindex">
<title>Interfacing Extensions To Indexes</title>
STORAGE box;
</programlisting>
- At present, only the GiST index method supports a
+ At present, only the GiST and GIN index method supports a
<literal>STORAGE</> type that's different from the column data type.
The GiST <literal>compress</> and <literal>decompress</> support
routines must deal with data-type conversion when <literal>STORAGE</>
- is used.
+ is used. Functions named <literal>extractValue</> and <literal>extractQuery</>
+ do conversation into internally used types for GIN.
</para>
</sect2>