Re: database design method

From: Lauri Pietarinen <lauri.pietarinen_at_atbusiness.com>
Date: Wed, 06 Nov 2002 16:25:41 +0200
Message-ID: <3DC92665.94261D5F@atbusiness.com>

Jan,

> Can you point me to the exact and complete definition of *the* language
> in which you define constraints in the RM?

"The Third Manifesto" by Date&Darwen defines a set of languages called "D" that are able to define arbitrary constraints. The same book defines "Tutorial-D", a sample language that has not been implemented.

Dataphor "D4" belongs to "D", so I would say that "D4" is _a_ language in which you can define constraints.

For documentation, see http://docs.alphora.com/D4LGConstraints.html + others on the same web site

regards,
Lauri Pietarinen Received on Wed Nov 06 2002 - 08:25:41 CST