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- Newsgroups: comp.databases
- Path: sparky!uunet!nwnexus!osiris
- From: David Ruggiero <osiris@halcyon.com>
- Subject: Re: Advanced Revelation information request
- Message-ID: <1992Dec18.080246.16463@nwnexus.WA.COM>
- Originator: osiris@halcyon.com
- Sender: sso@nwnexus.WA.COM (System Security Officer)
- Reply-To: osiris@halcyon.halcyon.com (David Ruggiero)
- Organization: [none - why fight entropy?]
- References: <92Dec12.152128.17650@acs.ucalgary.ca> <1gqe5aINNt3n@crcnis1.unl.edu>
- Date: Fri, 18 Dec 1992 08:02:46 GMT
- Lines: 29
-
- price@helios.unl.edu (Chad Price) writes:
-
- CP> ARev, in all of its versions, has what I call a passive data diction-
- CP> ary. The rules and data dictionary can be put in place, but the user
- CP> must explicitly choose to use them. In particular, as mentioned, you
- CP> can completely by-pass the referential integrity rules. In fact, you
- CP> can edit any record, including data dictionary records and compiled
- CP> code, using the ARev text editor...
-
- A very good point, which I would expand upon (possibly to the distress
- of some :). Revelation (and the Pick Operating System, upon which its
- data model is almost entirely based), can arguably be said not to be a
- databases at all, because they impose no rules, constraints, or defini-
- tions on the makeup or structure of data (records) in any particular
- file - even after the application (database) is up and running.
- In this sense, Pick (and Revelation) are only an extremely flexible and
- efficient _file_managers_, from which applications which have normal
- database-like functions can easily be built.
-
- It is rather like the difference between being given a car versus being
- given a machine shop with all the tools necessary to make a car.
- Much more power, much more flexibility, much more room to be creative
- and produce useful systems in very little time...but much more rope to
- do *really* stupid things. (After thirteen years working with
- Pick/Rev/ARev/Universe, I know of what I speak).
-
-
- --
- David Ruggiero (jdavid@halcyon.com) Seattle, WA: Home of the Moss People
-