es to <I>x</I> represent major changes with probable
incompatibilities and changes to <I>y</I> represent small enhancements
and bug fixes that retain backward compatibility.

<P></DL>
<H3><A NAME="M8">KEYWORDS</A></H3>
<A href="../Keywords/I.html#itcl">itcl</A>, <A href="../Keywords/V.html#variables">variables</A>
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