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RE: Mapping a UML model to a DTD or Schema

  • From: "Bullard, Claude L (Len)" <clbullar@i...>
  • To: "Vegt, Jan" <Jan.Vegt@s...>,XML-DEV Discussion <xml-dev@l...>
  • Date: Thu, 25 Jan 2001 08:31:26 -0600

model uml
There has been work on that since the STEP/PDES 
work on a document model for PDES (mid nineties).  
Yuri Rubinsky and I attended the early 
meetings.  I actually just threw away the documents 
from that period as I moved into a new home.  
At that time, the SGML was just an EXPRESS 
string and given the politics of it, no one went 
further than that at that time.    Eliot Kimber has done 
work in that area recently.  So yes, it has 
been looked at in some detail.  EXPRESS is a more 
powerful formalism for modeling.  XML is probably 
a more powerful model for distributing a model. 

One could create XML versions of EXPRESS but the 
question then was why bother.

Len Bullard
Intergraph Public Safety

Ekam sat.h, Vipraah bahudhaa vadanti.
Daamyata. Datta. Dayadhvam.h

-----Original Message-----
From: Vegt, Jan [mailto:Jan.Vegt@s...]
Sent: Thursday, January 25, 2001 3:40 AM
To: XML-DEV Discussion
Subject: RE: Mapping a UML model to a DTD or Schema

On Thursday, January 25, 2001 9:42 AM Robin Cover wrote :
>It's encouraging to hear mention of "conceptual modeling" in
>connection with Web/markup conferences; especially heart-warming
>to hear "conceptual modeling" and "schema design" in the
>same sentence.  My guess is that the syntax-centric
>stranglehold will not be broken until there's a conscious focus
>on conceptual modeling, accompanied by an unspoken agreement
>that XML schemas and other markup syntaxes can readily be
>generated from conceptual model notations.

On a somewhat related note :
Has anyone done any comparisons between the ideas and mechanisms in the ISO
standard including the EXPRESS modeling language and XML? 

[ I am relatively new to XML, my SGML experience dates back to the early
  I spent the last couple of years in the CAD industry. I am still ignorant
  enough about XML to think that STEP is more mature in certain areas, and 
  that we should learn from some valuable lessons experienced in that
domain. ]




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