Hey Art,
I'm not entirely sure you can do that, but I do know you can use the
Jess template extends functionality to have subtypes. So, to make all
templates with timestamps a child of a supertemplate called
TimeStampFact, you can do:
(deftemplate TimeStampFact
(slot timestamp)
.... )
(deftemplate SomeTimeOrientedFact extends TimeStampFact
....)
(deftemplate AnotherTimeOrientedFact extends TimeStampFact
...)
And the rule:
(defrule checktime
(TimeStampFact (timestamp ?x))
=>
...)
will be checked for all three templates above.
- Eithon
Art Griesser wrote:
Is it possible to declare a LHS pattern that matches any fact with a
given value for a slot with a given name, independent of the template?
For example, suppose I wanted to find all the facts (regardless of
template) that have a timestamp slot containing a date older than July
14, 2006?
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