Newsgroups: comp.constraints
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From: jamie@cs.sfu.ca (Jamie Andrews)
Subject: Re: Trilogy constraint language
Message-ID: <1995Jan19.233718.18677@cs.sfu.ca>
Organization: Faculty of Applied Science, Simon Fraser University
References: <ryder.4.000B7DA1@mbnet.mb.ca>
Date: Thu, 19 Jan 1995 23:37:18 GMT
Lines: 40

In article <ryder.4.000B7DA1@mbnet.mb.ca>,  <ryder@mbnet.mb.ca> wrote:
> A few years ago a Vancouver based softwarte company called Complete Logic
>Systems was marketing a PC based constraint language called Trilogy. I got
>it and liked it quite a lot. Then I heard they sold some part of it to 
>Vertical Systems I think and they made some enhancements and called it
>VS Trilogy.

     I'm not sure what the situation was... I think the company
actually split in some way.

>  The original company was on the verge of releasing a more
>complete product when they ran into some difficulties about 5 years ago and
>I haven't heard from them since. Does anyone know if this language is still
>available and if so through whom?

     Trilogy was developed by Paul (Pavol) Voda; I wrote the
original user manual but I haven't been in touch with Paul for
quite a while.  He moved back to Slovakia, and the last address
I have for him is "voda@nic.fmph.uniba.sk".  He would probably
know what the status is.  The last I heard, he was developing
another version in Slovakia.

     I too thought it was an excellent logic and constraint
language.  The development environment was very nice too.
It's a shame it was never ported to Unix (as far as I know).
I think it could have been a contender in the CLP stakes if it
had been known to a wider academic audience.

     On the other hand, I bet the first version still works well
and is pretty peppy on the modern PCs.

>What brought it to mind again was an article in the Feb 95 issue of BYTE
>on Constraint Logic Programming. The author Dick Pountain mentions the
>Trilogy language at the end of the article.

     Interesting.  Thanks, I will look at that article.

--Jamie.
  jamie@cs.sfu.ca
"Could you do the egg bacon spam and sausage without the spam then?"
