Path: utzoo!mnetor!uunet!mcvax!unido!tub!tmpmbx!netmbx!morus
From: morus@netmbx.UUCP (Thomas M.)
Newsgroups: comp.ai
Subject: Re: Student versions of OPS5
Message-ID: <1527@netmbx.UUCP>
Date: 14 Mar 88 16:59:30 GMT
References: <1110@pembina.UUCP> <1115@pembina.UUCP> <26695@aero.ARPA>
Reply-To: morus@netmbx.UUCP (Thomas Muhr)
Organization: netmbx Public Access Unix, Berlin
Lines: 36
Keywords: OPS5, IBM PC/XT/AT

In article <26695@aero.ARPA> srt@aero.UUCP (Scott R. Turner) writes:
>In article <1115@pembina.UUCP> goebel@pembina.UUCP (Randy Goebel) writes:
>> OPS5 is procedural, so maybe you will all be better off?
>
>In what way is OPS5 procedural?  
Maybe the intended meaning of 'procedural'in this case is 'opposite
of decalarative', which is true for OPS5. You define Condition-Action
pairs - the facilities for structured object representations are very
limited. Furthermore there is no way of accessing the rule-definitions at
}irun-time - because of the compilation, which makes OPS5-based systems the 
fastest (and therefor biggest) rule-based systems available (as far as I know).
This absence of sources at run-time restricts the expressional power of
OPS5 - no comfortable way of generating explanations, changing the control
flow schemes explicitely and centralized.
'Procedurally' is definitely the activation of external procedures in the
RHS - there are high chances of implicitely injecting a procedural style.

>
>At any rate, there have been various cheap rule-based expert system
                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>tools available on PCs for quite some time.  I don't think a $250
Which are these????

>I don't think the Vax version uses Rete (at least, it allows
I think it uses Rete-match, although I'm not sure. I have been working
with VAX-OPS5 for some time but have never found anything mentioning the
RETE-Match. 
But because of the linearity of runtime-rulenumber relation there should
be a precompilation similar to Rete. Who knows definitely?

---- Thomas Muhr
-- 
@(^o^)@   @(^x^)@   @(^.^)@   @(^_^)@   @(*o*)@   @('o`)@   @(`!')@   @(^o^)@
@  Thomas Muhr    Tel.: (Germany) 030 - 87 41 62    (voice!)                @
@  NET-ADRESS:	  muhrth@db0tui11.bitnet  or morus@netmbx.UUCP	            @   
@  BTX:           030874162                                                 @