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Re: Object Relationship

try this link
http://www.barryandassociates.com/
----- Original Message -----
From: "Falko Braeutigam" <falko@softwarebuero.de>
To: "Kenny Go" <kennygo@mail.com>; <ozone-users@ozone-db.org>
Sent: Tuesday, April 25, 2000 2:51 AM
Subject: Re: Object Relationship


> On Tue, 25 Apr 2000, Kenny Go wrote:
> > Hi!
> >
> > I have some questions about ODBMS:
> >
> > 1) How to build the object relationship like parent & child relationship
in
> > RDBMS?
> ozone is an OO database which fully supports the Java object and
programming
> model. So inheritence is done via subclassing.
>
> > 2) What is the use of addForKey??
> addForKey is a method of DxMap (adding an element/key pair) which is the
map
> interface of DxLib. We are using DxLib in the ozone core, therefore it's
part
> of the distribution package. You may also it for your applications but you
don't
> have to. You can also use Java2 collections or any other collection
library
> together with ozone.
>
> >
> > 3) In createObject, one of the parameter is to specify object name. Does
it
> > meant for an identifier of a object (like identifier of RDBMS record)?
> No. Names are not the primary identifier of an object in ozone. There are
also
> createObject() methods that do not have this parameter. Giving a name to
an
> object (making a so called root object) is a way to find the entry point
to the
> database (the root) from a newly started client.
>
> >
> > 4) What is ODMG? From what I understand, it is a standard group of
object
> > data storage. But, why is it that ozone has some methods to implement
it? Is
> > this another type of ODBMS?
> ODMG is a so called standard for OODBMSs. It more or less defines an API
that
> OODBMS vendors can support. Such a standard makes it easier to write
vendor
> independent client code.
>
> We are trying to support ODMG as far as possible.
>
> > Most of the question that I post are related to RDBMS concept that I am
used
> > to work with. Is there any article or information that I can get in
order to
> > understand better in ODBMS?
> We here at SMB will throw all our related bookmarks together an make them
> available at ozone-db.org. Should be availbale in the next few days.
Please, if
> someone knows about a good source of OODBMS related info, mail it to me.
>
>
> Falko
> --
> ______________________________________________________________________
> Falko Braeutigam                         mailto:falko@softwarebuero.de
> softwarebuero m&b (SMB)                    http://www.softwarebuero.de
>
>