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Recommendations for Rule Engine

 
Greenhorn
Posts: 7
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Anyone have a recommendation for a good java rule engine?
I only know of JESS http://herzberg.ca.sandia.gov/jess/
I'd like to split out a lot of picky rules involving water quality data from my general program logic and allow the end user to modify them.
Thanks!
 
author and iconoclast
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Well, Jess would almost certainly be the one for which you'd receive the most technical support by posting here at JavaRanch!
 
Wanderer
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True. Now if only there were a good book out there describing how to use it... Any recommendations, EFH?
Actually I've got EFH's book on my "to do" list - a lengthy list with a lot of things on it which never get done, but learning about Jess is up there pretty close to the top right now, so it could happen. Meanwhile, in the spirit of competition I've found this list of open source rules engines. Closed-source alternatives (including Jess of course) may be found among the comments. I have no info on how good any of these are other than the article itself; just wanted to stir the pot a bit.
 
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