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From: B.J.King@newcastle.ac.uk (Brian King)
Newsgroups: comp.object,comp.databases
Subject: Object Data Models and Manipulation Languages
Keywords: object-oriented data model query language
Message-ID: <1990Feb28.095810.15619@newcastle.ac.uk>
Date: 28 Feb 90 09:58:10 GMT
Sender: news@newcastle.ac.uk
Distribution: comp
Organization: Chemical & Process Engineering Dept, University of Newcastle, UK.
Lines: 34


Agreement between object-oriented data models seems as diverse as the
number of opinions on what actually object-oriented programming is!! 
It has been suggested [1] that little consensus exists and that object 
oriented database systems are predominantly in following groups:

	1. object-oriented programming languages with persistance
	2. full database systems based on traditional semantic data
	   models
	3. data models evolved from the relational model.

My questions are:-

1. is anyone aware of any consensus on object-oriented data models
   and query languages?

2. are there any reports providing a survey of current object-oriented
   data models and query languages?

3. is there a clear distinction between an object-oriented and semantic
   data model?

Any pointers (or even answers!) would be gratefully received.
If there is sufficient interest I will post a summary to the group.

	Regards

	Brian

	JANET : b.j.king@uk.ac.ncl

[1] Carey,M.J., et al.,'A Data Model and Query Language for EXODUS'
    Proc. 1988 ACM SIGMOD Conf., SIGMOD RECORD 17(3), Sept. 88,
    pp. 413 - 423.