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Re: Object Relationship
On Tue, 25 Apr 2000, Schneur Feigelstock wrote:
> try this link
> http://www.barryandassociates.com/
Thanks. I will add it to the page.
Falko
> ----- 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
> >
> >
--
______________________________________________________________________
Falko Braeutigam mailto:falko@softwarebuero.de
softwarebuero m&b (SMB) http://www.softwarebuero.de