[unrev-II] Data Modelling

From: Eric Armstrong (eric.armstrong@eng.sun.com)
Date: Sun Feb 20 2000 - 17:20:51 PST


From: Eric Armstrong <eric.armstrong@eng.sun.com>

I just got this interesting pointer from another list.
Anyone familiar with it, or willing to give it a look?

The referenced page lists a number of books, at least
one of which is by Martin Fowler, so it is must be
real...

-------- Original Message --------
From: Kjell Bengtsson <Kjell.Bengtsson@EPMTECH.JOTNE.COM>

For avanced mapings you may consider the ISO 10303 standards.
There you will find both a formal data modelling langauge EXPRESS and a
declarative mapping langauge EXPRESS-X. As for implementations you
can access both models (schemas) and data sets by Java (part 27) and
XML (part 28).

I am convinced that ISO 10303 and Express-X will solve your mapping
concerns. Then you can link in these pieces of software into your
applications.

( You can find more about ISO 10303 at :
http://www.epmtech.jotne.com/learn/index.html )

Best regards, Kjell

> -----Original Message-----
> From: Sylvia Fang [SMTP:FangSH@PEBIO.COM]
>
> I'm trying to design DTD for data exchange between several applications.
> These applications look at these data with different perspectives.
> For example, one might be interested in knowing students in a class:
> <!ELEMENT SCHOOL (CLASS)+>
> <!ELEMENT CLASS (STUDENT)+>
> <!ELEMENT STUDENT (ORGANIZATION) >
> <!ATTLIST STUDENT
> name CDATA #REQUIRED>
>
> Another might be interested in knowing students in extra-curricular
> organizations:
> <!ELEMENT SCHOOL (ORGANIZATION)+>
> <!ELEMENT ORGANIZATION(STUDENT)+>
> <!ELEMENT STUDENT (CLASS) >
> <!ATTLIST STUDENT
> name CDATA #REQUIRED>
>
> The data content is the same, but with different groupings.
> Is it possible to design a flexible DTD such that each
> application doesn't have to traverse and re-structure the tree?
>

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