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<A NAME=WHEN> <TITLE>WHEN</TITLE></A> <b><a href=r37_idx.html>INDEX</a></b><p><p> <B>WHEN</B> _ _ _ _ _ _ _ _ _ _ _ _ <B>operator</B><P> <P> <P> <P> The <em>when</em> operator is used inside a <em>rule</em> to make the execution of the rule depend on a boolean condition which is evaluated at execution time. For the use see <A HREF=r37_0060.html>rule</A>. <P> <P>