<P
>    Basically a thesaurus dictionary replaces all non-preferred terms by one
    preferred term and, optionally, preserves the original terms for indexing
    as well.  <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>'s current implementation of the
    thesaurus dictionary is an extension of the synonym dictionary with added
    <I
CLASS="FIRSTTERM"
>phrase</I
> support.  A thesaurus dictionary requires
    a configuration file of the following format:

</P><PRE
CLASS="PROGRAMLISTING"
># this is a comment