Hi all,
I have the followong problem:
I have the facts:
(entity id x y)
(position pid x y )
Now theres a rule which asserts new facts based on the current values of
the above facts.
the new fact is of the type:
(EntityAt id pid)
Now at some point in the future the fact for entity modifies its x and y
values. I would like this to delete the old EntityAt fact and assert a new
fact based on the new value of entity fact. Basicly I want Jess to clean
up after itself. Is there an easy and straight forward way of doing this?
I am currently using the fact number to see if a fact is newer than
another to see if it is still valid.
the problem is complicated by the fact that I already have a big facts and
rule base and I want to achieve this by making the minimal changes.
thanx ,
Neeraj.
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