Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!cs.utexas.edu!uunet!mcvax!unido!uklirb!shell From: well!gors@lll-crg.llnl.gov (Gordon Stewart) Newsgroups: comp.ai.shells Subject: CLIPS Keywords: CLIPS NASA Rete C Portable Message-ID: <6216@uklirb.UUCP> Date: 23 Jul 89 02:54:44 GMT Sender: news@uklirb.UUCP Reply-To: Gordon Stewart Organization: Small Systems Solutions Lines: 30 Approved: shell@uklirb.uucp Posted-Date: Tue Aug 1 14:52:46 GMT 1989 I have been using CLIPS, an expert system shell developed by NASA -- Having been impressed by the speed and power of it on my 386 box, I have decided to shell out the $350 for the source -- approx. 25,000 lines of (allegedly) very portable C. CLIPS has many nice features, including its use of the Rete Pattern Matching Algorithm. It appears to have inherited much from OPS5 -- it does not directly implement backward chaining in the inference engine, but it took me but two days to implement backward chaining in a limited way -- starting with assertion of a single goal attribute, without representing certainty factors, single-valued attributes, etc. This was an exercise mostly for my edification, since I intend to build only forward-chaining systems. My intention is to make extensions, such as a portable foreign-function interface, as well as X Windows support. It is my intention to developsubscription mailing list of CLIPS users, afficionados, or otherwise interested persons. If you use or are interested in CLIPS, please e-mail me. This is not a formal announcement, just a query to test level of interest. Ciao. -- {apple, pacbell, hplabs, ucbvax}!well!gors gors@well.sf.ca.us (Doolan) | (Meyer) | (Sierchio) | (Stewart)