XML Schema Question: attributing an element with a datatype?

[Stefan Haustein]

> Here is an example from the XML Schema spec that I based my solution
> upon:
> 
>     <element name="picture">
>         <type source="binary" derivedBy="extension">
>             <attribute name="pictype" type="NOTATION"/>
>         </type>
>     </element>
> 
> This example shows the source attribute referencing the built-in
> datatype "binary".  I inferred that the source attribute could also
> reference a built-in datatype (e.g., the money datatype).  Do I infer
> incorrectly?  /Roger

oops, I have overlooked that. I think some
clarification from the schema people is needed here. 
I started implementing a schema parser where the type and 
datatype are represented by different classes at the
same level. If the example above is valid, I need to make 
the datatype a property of the type, at the level of the 
content model.

That leads to a general problem: Currently there 
are three different but overlapping concepts

1) content-model
2) type 
3) datatype

I think at least one should/could be removed from the specs.

Best regards

Stefan

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