erms, a general English dictionary and a <SPAN
CLASS="APPLICATION"
>Snowball</SPAN
> English
   stemmer:

</P><PRE
CLASS="PROGRAMLISTING"
>ALTER TEXT SEARCH CONFIGURATION astro_en
    ADD MAPPING FOR asciiword WITH astrosyn, english_ispell, english_stem;</PRE
><P>
  </P
><P
>   A filtering dictionary can be placed anywhere in the list, except at the
   end where it'd be useless.  Filtering dictionaries are useful to partially
   normalize words to simplify the task of later dictionaries.  For example,
   a 