JESS: Rule comparing slot values that can be omitted

2008-07-03 Thread Henrique Lopes Cardoso
Hi, I have tried the straightforward example below. I define two simple deftemplates and a rule that compares their slots, which are assumed to be numeric. Then, I incidentally assert a fact on which I do not define a value for a slot. When the rule is evaluated (after the second assertion), I

Re: JESS: Rule comparing slot values that can be omitted

2008-07-03 Thread Ernest Friedman-Hill
On Jul 3, 2008, at 1:29 PM, Henrique Lopes Cardoso wrote: Now, I understand the error. But maybe Jess should be nicer by noticing that if the comparison cannot be made, then it should simply not fire the rule (quietly). In general, you can just use a more appropriate default for the

RE: JESS: Rule comparing slot values that can be omitted

2008-07-03 Thread rrogers
PM To: jess-users@sandia.gov Subject: JESS: Rule comparing slot values that can be omitted Hi, I have tried the straightforward example below. I define two simple deftemplates and a rule that compares their slots, which are assumed to be numeric. Then, I incidentally assert a fact on which I do