I spoke to Kyle this week at Object Expo, Europe.  KSC was bought out by
another company (sorry, I don't remember who) after having severe financial
problems.  Kyle went to this company, but shortly thereafter moved to IBM.

I have read Kyle's paper and heard his talk on Crossing Chasms.  They are
both excellent.  I'll ask him where the link is, and when I find it, I'll
post it to this list.

jlo

> -----Original Message-----
> From: Jarvis, Robert P. [mailto:Jarvisb at timken.com]
> Sent: Wednesday, July 01, 1998 8:11 PM
> To: 'squeak at cs.uiuc.edu'
> Subject: RE: Leads for database application development
>
>
> I just remembered a pattern language I came across a while ago.  It's
> called "Crossing Chasms" and was developed by Kyle Brown and Bruce
> Whitenack at Knowledge Systems Corp.  The link I had to it is now
> obsolete (it appears KSC is redoing their website) but if you can
> contact one of the authors they might be able to make it available to
> you.  As of last November Kyle was still at KSC - try mailing him at
> kbrown at ksccary.com to see if/how you can get a copy of the pattern
> language.  There were two parts to it the last time I knew - the "basic"
> patterns and the "architectural" patterns.
>
> I also found a paper on an architecture called HORA which might be of
> interest.  You can find it at
> http://object.idx.com/papers/horav2.pdf.
>
> I hope this helps.
>
> Bob Jarvis
> The Timken Company
>
> >-----Original Message-----
> >From:	Mark A. Schwenk [SMTP:mas at wellthot.com]
> >Sent:	Wednesday, July 01, 1998 2:24 PM
> >To:	squeak at cs.uiuc.edu
> >Subject:	Re: Leads for database application development
> >
> >Jerome,
> >
> >Thanks for responding to my query. I am very interested in hearing your
> >ideas and would be willing to work on this. It's long been a
> goal of mine to
> >produce a Smalltalk database application development environment. Your
> >experience in the analysis of this domain sounds like it would be very
> >helpful.
> >
> >Thanks!
> >
> >-Mark
> >
> >-----Original Message-----
> >From: Jerome Garcia <Jerome.Garcia at wj.com>
> >To: squeak at cs.uiuc.edu <squeak at cs.uiuc.edu>
> >Date: Wednesday, July 01, 1998 12:31 PM
> >Subject: Re: Leads for database application development
> >
> >
> >>     Mark,
> >>
> >>     Bob Adler, Chris Earnest, and I were involved at Claris (Apple) in
> >>     development of a set of classes in C++ to provide distributed
> >>     heterogeneous database access.
> >>
> >>     Bob designed a set of database provider classes which abstracted
> >>     access to various sources which could range from delimited
> flat files
> >>     to the various relational databases.
> >>
> >>     Chris designed a set of classes which could optimize distributed
> >>     heterogeneous requests.
> >>
> >>     I designed a set of classes to represent the distributed data
> >>     dictionary and database requests. The database request classes were
> >>     based on but not limited to the ANSI SQL 92 standard. All database
> >>     request classes were subclasses of an expression class whose super
> >>     class was a tree node class.
> >>
> >>     This was all part of a fairly ambitious effort at Claris. I left
> >>     shortly after proof of concept and initial testing of those parts
> >>     involving Bob, Chris, and I so that I could do Smalltalk
> development
> >>     at Penergy. What can I say? I wanted to do Smalltalk :-)
> >>
> >>     The parts which Bob and I did worked extremely well and
> were very easy
> >>     to extend. I would like to see a similar direction taken
> in Squeak. I
> >>     have thought about about doing this myself but have not
> been able to
> >>     find the time. Also, I do not have any experience in
> access of object
> >>     oriented databases so I can not say whether it is useful to include
> >>     them when considering the problem.
> >>
> >>     If you would like additional info, send me some e-mail.
> >>
> >>     Jerome E. Garica, Adventurous Mind
> >>     jegarcia at adventurousmind.com
> >>
> >
>