I think Gang Liu wrote: > hi, all > I borrow this topic to ask another question. Thanks in advance! > > Requirement: > =========== > We have two rules. The values are hold by facts. We want to pass > values from the first rule to the second rules.
Generally, it's better to think of working memory as a "database" of information, which the rules all share; this leads to a clearer answer to your question below. > [Should we modify an existing fact, or create a new fact?] If the facts are akin to temporary variables -- i.e., they hold a bit of information with a finite lifespan -- then, like a temporary variable, it's best to create a new one for a new purpose, rather than reusing an old one. However, if the facts represent entities, as a Java object often does, and the new information adds to or modifies the character of that entity, then you should modify the existing fact. Make sense? --------------------------------------------------------- Ernest Friedman-Hill Distributed Systems Research Phone: (925) 294-2154 Sandia National Labs FAX: (925) 294-2234 Org. 8920, MS 9012 [EMAIL PROTECTED] PO Box 969 http://herzberg.ca.sandia.gov Livermore, CA 94550 -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------
