Dear Antoinette, (01)
Yes, and database records can represent classes too, we call them
Reference Data (see job title below). (02)
Regards (03)
Matthew West
Reference Data Architecture and Standards Manager
Shell International Petroleum Company Limited
Shell Centre, London SE1 7NA, United Kingdom (04)
Tel: +44 20 7934 4490 Mobile: +44 7796 336538
Email: matthew.west@xxxxxxxxx
http://www.shell.com
http://www.matthew-west.org.uk/ (05)
> -----Original Message-----
> From: ontolog-forum-bounces@xxxxxxxxxxxxxxxx
> [mailto:ontolog-forum-bounces@xxxxxxxxxxxxxxxx]On Behalf Of Arsic,
> Antoinette
> Sent: 23 October 2006 13:53
> To: [ontolog-forum]
> Subject: Re: [ontolog-forum] Ontology and Databases
>
>
> Thanks Matthew,
>
> And to confuse things even further (though I'm now getting
> some of this
> straight) an rdf:type can also be an instance - that one
> threw me until
> I went through a simple RDF primer. Elements that were classes and
> properties were initially giving me concern.
>
> Thanks,
> Antoinette
>
>
> ------------------------------
> Antoinette Arsic , Information Scientist, M.S.
> The MITRE Corporation
> 703-983-5286 (office)
> 443-567-2703 (cell)
>
>
>
>
> -----Original Message-----
> From: ontolog-forum-bounces@xxxxxxxxxxxxxxxx
> [mailto:ontolog-forum-bounces@xxxxxxxxxxxxxxxx] On Behalf Of
> matthew.west@xxxxxxxxx
> Sent: Monday, October 23, 2006 8:42 AM
> To: ontolog-forum@xxxxxxxxxxxxxxxx
> Subject: Re: [ontolog-forum] Ontology and Databases
>
> Dear Antoinette,
>
> Well I think this is only part of what you need to look at. Logic
> based ontology languages have elements that are both classes and
> instances. When you translate that into a database, the instances
> become database records. Therefore there is a key design decision
> about what in your ontology to have in the database structure, and
> what to hold as data.
>
> Apart from that, and looking at what Chris mentions below, my
> experience is that different languages have different capabilities
> and limitations, and you need to first of all look at the limitations
> in your source format, and try to make sure when you translate, not
> to introduce the unintended limiations from the first language in
> the second.
>
> Regards
>
> Matthew
>
> PS. Note to Chris on contradictions:
>
> Data models are ontologies
> Common Logic has a Data Model
> Therefore Common logic is NOT an ontology???
>
> > -----Original Message-----
> > From: ontolog-forum-bounces@xxxxxxxxxxxxxxxx
> > [mailto:ontolog-forum-bounces@xxxxxxxxxxxxxxxx]On Behalf Of Arsic,
> > Antoinette
> > Sent: 20 October 2006 17:05
> > To: [ontolog-forum]
> > Subject: Re: [ontolog-forum] Ontology and Databases
> >
> >
> > Yes, that better rephrases my question.
> >
> > Thanks,
> > Antoinette
> >
> >
> > ------------------------------
> > Antoinette Arsic , Information Scientist, M.S.
> > The MITRE Corporation
> > 703-983-5286 (office)
> > 443-567-2703 (cell)
> >
> >
> >
> >
> > -----Original Message-----
> > From: ontolog-forum-bounces@xxxxxxxxxxxxxxxx
> > [mailto:ontolog-forum-bounces@xxxxxxxxxxxxxxxx] On Behalf Of
> > Christopher Menzel
> > Sent: Friday, October 20, 2006 11:44 AM
> > To: [ontolog-forum]
> > Subject: Re: [ontolog-forum] Ontology and Databases
> >
> > On Oct 19, 2006, at 6:48 AM, Arsic, Antoinette wrote:
> > > I'm in desperate need of knowledge on how to move from an ontology
>
> > > to a
> > > data model or how to develop the two together - I'm in a
> position
> > > where
> > > we are developing the ontology and data model
> simutaneously (uggh),
> > > just because that is how it has to be.
> >
> > I'm not sure I understand the question. From a logical point of
> > view, a well-defined data model just *is* a type of ontology. So,
> > from that perspective, to develop a data model is to develop an
> > ontology. I'm suspecting therefore that your question has to
> > do more
> > with how to express the same ontology (in the logical sense) in both
>
> > a specific data modeling language like ER and a specific ontology
> > language like OWL-DL. Is that your question?
> >
> > Chris Menzel
> >
> >
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