Have you looked at insertLogical()?<br><br>&quot;Changes made&quot; is a very general term, could be anything...<br>-<br>-W <br><br><br><div class="gmail_quote">2010/12/15 Diego San Esteban <span dir="ltr">&lt;<a href="mailto:diego.sanesteban@coremain.com">diego.sanesteban@coremain.com</a>&gt;</span><br>
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<div><pre><span><span lang="EN">Greetings,</span></span></pre><pre><span><span lang="EN"> </span></span></pre><pre><span><span lang="EN">How is</span></span><span lang="EN"> it <span>possible to implement a</span> <span>&quot;</span>rollback&quot; <span>in</span> the <span>KB</span>?<br>

<span>Suppose</span> <span>that when retracting</span> a<span> fact</span>, <span>I</span> want to <span>undo the</span> <span>changes</span> <span>made.</span><br>
</span><span lang="EN-US">Writing a negative (opposite) rule isn&#39;t efficient, it means declaring the rule twice effectively. Also the negative rule is usually using lots of OR’s and NOT&#39;s which isn&#39;t fast.</span></pre>


<p class="MsoNormal"><span style="font-size: 10pt;" lang="EN"><br>
<span>Any help?</span><br>
<br>
<span>Thanks</span></span></p>

<p class="MsoNormal"><span lang="EN"> </span></p>

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