Hi Sandy,
Your post was so comprehensive and I could clarify many doubts that I had
about the implementation details of SCD and the relationship between XSModel
and schema.


> - SCD is to address "schema components", not schema documents or fragments
> of schema documents. Schema components are represented in Xerces using the
> org.apache.xerces.xs interfaces (XSModel and friends). So the primary SCD
> operations should on XSModels. XSModel is equivalent to the "schema
> description component" mentioned in the SCD spec.
>
This was so helpful for me to understand the purpose of XSModel. Also, there
are some points in your mail that I have to study more about and I don't get
the difference between "a schema" and "a schema documet", when you say,

>  Given that there is no defined way to resolve an URI to a schema (note:
> not a schema document), it'll often be difficult (and not very useful) to
> work with absolute SCDs.
>
 what is actually the difference between them?
Thank you.

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