=?utf-8?Q?Re=3A_=5Bxml-dev=5D_What_is_a_=E2=80=9Cdata_model?==?utf-8?Q?=

[Michael Kay <mike@saxonica.com>]

As I look through the XML Schema specification I see no UML diagrams.

 

As I look through the GML specification I see many UML diagrams.

 

Are UML diagrams not relevant/useful for data models in the first sense? Are UML diagrams only relevant/useful for data models in the second sense?

 

I suspect that the kind of people who define models like the XML schema model and the relational model are more comfortable with maths and legalese English than with pictures. So I think it tells you more about the psychology of the individuals concerned than anything else.

Michael Kay

Saxonica