I think Matthew Hutchinson wrote:
>
> I have tried all sorts of variations, and have done this before but I have
> just gone blank. (I also looked thru some previous postings)
> as you can see, i need to store the matched fact, then refer to it, and
> update the multislot with its previous contents and the new item.
>
Just this?
(defrule alias-rule1
?R <- (street_type_alias (actual WOODS) (alias ?previous_alias))
=>
(modify ?R (alias ?previous_alias WS)))
---------------------------------------------------------
Ernest Friedman-Hill
Advanced Software Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
PO Box 969, MS 9012 [EMAIL PROTECTED]
Livermore, CA 94550 http://herzberg.ca.sandia.gov
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