You could use eval( &lt;expression&gt; ) for this, but I guess it could also be added as a return value field constraint to the last of these four fields. Would you mind providing the full pattern?<br>-W<br><br><div class="gmail_quote">
2009/3/20 Zevenbergen, Alex <span dir="ltr">&lt;<a href="mailto:azevenbergen@paddypower.com">azevenbergen@paddypower.com</a>&gt;</span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">




<div>
<div><font face="Arial" size="2"><span>Hi,</span></font></div>
<div><font face="Arial" size="2"><span></span></font> </div>
<div><font face="Arial" size="2"><span>quick newbie 
question about the when clause in a rule. eg can i get the fact to be tested 
from the result of two other inputted facts?</span></font></div>
<div><font size="-0"><span><font color="#ff0000" face="Arial" size="2"></font></span></font> </div>
<div><font size="-0"><span><font color="#ff0000" face="Arial" size="2">details.HOME_MATCH_SCORE - details.HOME_FULL_TIME_SCORE &gt; 
details.AWAY_MATCH_SCORE - details.AWAY_FULL_TIME_SCORE</font></span></font></div>
<div>
<p><span><font face="Arial" size="2">I assumed this would 
work fine but it doesn&#39;t recognise the &#39;-&#39; as a minus!</font></span></p>
<p><span><font face="Arial" size="2">Thanks in 
advance</font></span></p>
<p><span><font face="Arial" size="2">Alex</font></span></p></div>
<div><font face="Arial" size="2"></font> </div>
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