         implicitly chosen) determines which variant of the PL/Python
         language becomes available.  See
         
         <A
HREF="plpython-python23.html"
>Section 43.1</A
>
         for more information.
        </P
></DD
><DT
><TT
CLASS="ENVAR"
>TCLSH</TT
></DT
><DD
><P
>         Full path to the Tcl interpreter.  This will be used to
         determine the dependencies for building PL/Tcl, and it will
         be substituted into Tcl scripts.
        </P
></DD
><DT
><TT
CLASS="ENVAR"
>XML2_CONFI