<P>This module provides the ability to use references as hash keys if
you first <A HREF="../../lib/Pod/perlfunc.html#item_tie"><CODE>tie</CODE></A> the hash variable to this module.</P>
<P>It is implemented using the standard perl TIEHASH interface. Please
see the <A HREF="../../lib/Pod/perlfunc.html#item_tie"><CODE>tie</CODE></A> entry in <CODE>perlfunc(1)</CODE> and <CODE>perltie(1)</CODE> for more information.</P>