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From: schunk@infhil.UUCP (Michael Schunk)
Newsgroups: comp.ai,comp.databases
Subject: Re: Request about semantical databases.
Keywords: semantical, object-oriented, databases
Message-ID: <393@infhil.UUCP>
Date: 3 Nov 88 11:32:04 GMT
References: <461@dnlunx.UUCP>
Reply-To: schunk@infhil.UUCP (Michael Schunk)
Organization: University of Hildesheim, W-Germany
Lines: 34



You may find some literature in the acm computing surveys:
	2/87 Atkinson/ Buneman
	3/87 Hull/ King
	3/88 Peckham/ Maryanski

Springers Lecture Notes in Computing Science, Volume 334, 
contains papers from the second international 
workshop on obj. oriented database systems.

Now my own question:
I have the task to make arbitrary data objects of the two 
languages Ada and Setl ( as the name implies a set oriented 
language, that uses sets, tuples and maps as type constructors ) 
persistent.
Programs in one of the languages should be able to access
persistent objects created from a program in the other language.
My idea was to use a semantic/obj. oriented database and
to create interfaces for each of the languages:
persistent objects are stored in the database and can
be accessed with the interface. 
My problem is to get a semantic database. We only have
a normal relational database and it seems to be a lot
of work to store arbitrary objects with it.
Does anybody know from where to get a prototype of a 
semantic or object oriented database system?
Advanced properties such as inheritance, generalization etc
are nice but not necessary, because we do not plan to
make an object oriented language persistent at the moment.

Thanks in advance,

Michael Schunk