[dsdl-comment] Monolithic schemas are bad, right?

Hi Folks,

In James Clark's NRL tutorial[1] he writes about creating a schema for
XHTML that imports SVG:

"Suppose we have RELAX NG schemas for XHTML and for SVG. We could use
these directly as subschemas in NRL. But we might prefer instead to use
RELAX NG mechanisms to combine these into a single RELAX NG schema.
This would allow us conveniently to allow SVG elements only to occur in
places where XHTML block and inline elements are allowed and to
disallow them in places that make no sense (for example, as children of
a 'ul' element)."

Later he refers to this as the "xhtml+svg.rng" schema.

I interpret James' paragraph as, "Rather than taking the existing
schemas and assembling them, create a monolithic schema."

This seems counter to the NVDL philosophy of "taking what schemas exist
and assemble them."

Most likely I am misunderstanding what James is saying.

Would someone clarify this please?

/Roger

[1] http://www.thaiopensource.com/relaxng/nrl.html#Related_namespaces

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