I think Nazar Saeed wrote:
>
>
> Can anybody tell me more about Salience.
> For Example i wrote something like this:
>
> (rule 1
> (declare (seliance 100))
...
>
> (rule 2
> (declare (seliance -100))
...
>
> (rule 3
> (declare (seliance -500))
...
> but by the execution the order won't be held, i mean rule 3 is not always
> the last rule which fire.
>
Salience only orders rules which are on the agenda at the same
time; for example, here rule-2 will fire second, even though it has
higher salience, because rule-2 is activated by the (reset), while
rule-1 is not activated until rule-2 fires.
(defrule rule-1 (declare (salience -1)) (foo) => )
(defrule rule-2 (declare (salience 1)) => (assert (foo))
(reset)
(run)
If you want to assure that a rule doesn't fire until some other rule
has fired, have the earlier rule assert a fact which the later rules
must match; this is a much betterapproach than using salience. Note,
also, that any use of salience will incur a performance penalty.
> How to set the Salience-Strategy.
>
You can use the set-strategy command to affect the order in which
rules fire, but the built-in strategies (breadth and depth) differ
only in the way in which activations of the same salience are ordered;
they both behave the same way with respect to salience.
If you're using Jess 5.0a(X) and you believe your rules are not firing
in the correct order, please send me a concise sample script which
displays the problem. There could very well be bugs (although the
agenda-ordering code has been very thoroughly tested by now).
>
>
> greeting
> Nazar Saeed
>
---------------------------------------------------------
Ernest Friedman-Hill
Distributed Systems Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
Org. 8920, MS 9214 [EMAIL PROTECTED]
PO Box 969 http://herzberg.ca.sandia.gov
Livermore, CA 94550
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