IV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="TEXTSEARCH-THESAURUS"
>12.6.4. Thesaurus Dictionary</A
></H2
><P
>    A thesaurus dictionary (sometimes abbreviated as <ACRONYM
CLASS="ACRONYM"
>TZ</ACRONYM
>) is
    a collection of words that includes information about the relationships
    of words and phrases, i.e., broader terms (<ACRONYM
CLASS="ACRONYM"
>BT</ACRONYM
>), narrower
    terms (<ACRONYM
CLASS="ACRONYM"
>NT</ACRONYM
>), preferred terms, non-preferred terms, related
    terms, etc.
   </P
>