Re: DC-WG: 4/15 meeting minutes

Mark Hahn (mhahn@cadence.com)
Tue, 28 Apr 1998 11:13:43 -0700

On Apr 28, 12:58pm, Steve Grout wrote:
> Subject: DC-WG: 4/15 meeting minutes
> If Jin-sheng would like, I would be glad to take the conceptual
> model he is coming up with, and convert it into EXPRESS formal
> semantic model. The format of the model he has provided todate is
> very understandable and moving to ever greater depth and detail.
> An EXPRESS version of his model would allow those of us working on
> data representation using that latter format to then start to
> understand the impact of supporting this emerging constraints work.
> - Please note that I do not here propose at all to replace his
> format/style with EXPRESS - His approach is very useful for
> understanding the proposed architecture and data elements.

I think this would be a useful exercise, and eventually it could
be the basis for additional deliverables (the EXPRESS model itself
along with APIs supporting the model). However, I'd hate to
substantially slow progress on defining a command language
(which I believe is more readily adopted). If we could do this
in parallel, possibly through a sub-group, it'd be great.

> - Will there also be a format/method also for implement the constraint
> data/rules data population within an EDA tool, such as an API
> (e.g. C++)?

I think this would be useful eventually. One nearer-term approach
would be to not only supply a golden parser (lexer and yacc grammar)
for a command language, but also an implementation of the parser which
creates data structures. This is a lot more work, which I can attest
to based on doing it for GCF.

> > 3. Constraint dictionary discussion
> > We postponed this to the next meeting.
>
> Can someone point me at a working document on this area? I haven't been
> able to read all the DC-WG email and seemed to missed discussion on
> this.

See http://vhdl.org/dcwg/hm/0005.html and follow the links at
the bottom under "Attachments".

Mark

-- 
Mark Hahn                                          phone: (408) 428-5399
Architect, Deep Submicron Business Unit            fax:   (408) 428-5959
Cadence Design Systems                             email: mhahn@cadence.com