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[Stephen D Green <stephengreenubl@gmail.com>]

You have to look at the target audience. A data model in the 'second sense' will have consultants and business analysts and systems analysts in enterprises as target audience. They like the UML so they can compare models with minimal need to understand written descriptions or mathematical expressions. Plus tools can help with using UML in various ways such as mapping between data models. Then the UML can be handed on to a developer and/or included in a spec.

On Tuesday, 27 September 2016, Costello, Roger L. <costello@mitre.org> wrote:

Ø  A data model in the first sense is the set

Ø  of constructs (complex types, simple types,

Ø  element declarations, attribute declarations,

Ø  etc.) defined in the XML Schema specification.

 

Ø  A data model in the second sense is a particular

Ø  XML Schema. For example, the Geography

Ø  Markup Language (GML) XML Schema is a

Ø  data model in the second sense.

 

Thank you Michael and Jim.

 

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?

 

/Roger

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Stephen D Green