David Forslund wrote:

> 
> I would recommend using tools where they are designed.  That means using
> UML and XML where appropriate.  XML is a representation of data not a
> design tool.   UML can be expressed in XML (using XMI) if you like.
> 


It seems to me that the very meta-data aspect of XML that is used to
tell the XML parser what the XML document is all about is, in fact, a
modeling function.  Models, if there are more than one of them, have to
be able to describe themselves (I think), and there are always going to
be a myriad of models in medicine.  The entire literature on practice
variations tends to support this.  So how do you handle multiple
models?  XML looks good for simple modeling that can describe itself and
can easily be translated into an object database.  Or am I completely
off the mark?

John

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