Hi!
> I want to get the A value for all facts with specific B value.
> [...]
> Is there any way I can search across multiple templates?
It seems you might have a generalization hierarchy where you could use
inheritance to do what you want to accomplish. Instead of writing
(deftemplate foo (slot A) (slot B) (slot C) ...)
(deftemplate bar (slot A) (slot D) ...)
(deftemplate baz (slot A) (slot B) (slot E) ...)
you could as well say
(deftemplate root (slot A) (slot B))
(deftemplate foo extends root (slot C) ...)
(deftemplate baz extends root (slot E) ...)
and then have the following rule:
(defrule findB
(root (A ?id) (B specific-value))
=>
(do-something-with ?id))
Greetings,
Thomas
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