Hi everyone,
I am impressed by the quality of the Jess.
It is really powerfull system. {:)
I have simple question:
Is this query supposed to work ?
(deftemplate person
(slot id (type INTEGER) (default 0) ) ;; 0 means not initialized
(slot sex (type ATOM) (default nil) ) ;; male/female atoms
(slot mother (type INTEGER) (default 0) ) ;; 0 means not initialized
(slot father (type INTEGER) (default 0) ) ;; 0 means not initialized
)
...
(defquery children-of (declare (variables ?id))
(person (mother ?mid) (father ?fid))
(test (or (= ?id ?mid) (= ?id ?fid)))
)
the run-query complains about sth like
Value.listValue while executing (= ?id ?mid)
Not a list: "1" (type = INTEGER).
But there are only integer number involved in this query,
so why is he expecting list ?
Am I missing something about concept of queries ?
Thank you very much
Michal
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