Re: Linkbases, Topic Maps, and RDF Knowledge Bases -- help me

["Thomas B. Passin" <tpassin@home.com>]

Danny Ayers said -

> I may be wrong, isn't the purpose of UML to allow it to model all
different
> kinds of things? (hence Unified)
> i.e. part of the U of UML was to bring in ER?
>
Well, you can think of classes that have only properties, no methods, as
being entities in the ER sense, so you can certainly model them in UML (or
OML, which I mentioned in my other post).  On the other hand, UML doesn't
really have support for data integrity rules, primary keys, nor foreign
keys, just to mention a few topics of great importance to relational
database modeling.  So UML isn't the best for that.

Cheers,

Tom P