Re: Definition of the word "business" terms?

In article <34AD3BBB.11F8_at_apci.net>, Eric Bohn <ebohn_at_apci.net> wrote:
>By supporting views and different levels of presentation, there are ER
>style modeling tools that can be used to both reverse engineer existing
>applications and forward engineer them. However, without the
>capabilities of a robust repository, there are business rules that don't
>make sense to be part of a data model.
>
>I've actually seen two definitions of ODBMS: a tool used to store
>objects persitently (for example, an OOPL like Ada with extensions to
>handle persistence and concurrency control) and a tool used to store
>object data (for example, an RDBMS with extensions to handle complex and
>user defined data types with encapsulated function to act upon those
>data types). I suppose the latter definition would be what you would
>call an ORDBMS and probably is what you would be interested in most if
>you were transitioning from relational data to an object environment.
>
>The bottom line is that the RDBMS and ODBMS paradigms are very
>different. Because the focus is on the data management facet of

Aren't they so different that they aren't mutually exclusive?

>application development rather than the complete system, the ERD/RDBMS
>method has inherent limitations in the types of business rules that can
>be modeled and implemented effectively (by the DBMS).
>
>I have a draft copy of the IEEE IDEF1X-97 standard which contains an
>extended version of the old purely ER style IDEF1X data modeling
>language. The document also clarifies the similarities and differences
>between the two languages and thus could serve as a guide for
>transitioning to OO. "Identity-style IDEF1X", the OO version, is also
>designed to be automatable (though of course no tools support it yet).
>
>Eric Bohn

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