DocBook and Schematron

Hi all,

What's the implication of Schematron in DocBook?
If my customized DocBook schema is based on RNG, should I also
care about schematron?

Furthermore, what's the purpose of file "docbook.nvdl"?

Thanks,
j3d.

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Giuseppe Greco

Agamura Entertainments, Inc.
6928 Manno
Switzerland

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