ANN: Modular Namespaces (MNS)

I've designed and implemented a little language called Modular Namespaces
(MNS). The spec is at:

  http://www.thaiopensource.com/relaxng/mns.html

There's a new release of Jing that includes a sample implementation:

  http://www.thaiopensource.com/relaxng/jing.html#mns

It's designed to be useful when:

- you have an instance that uses elements and attributes from multiple
namespaces;

- you have one or more schemas (not necessarily all in the same schema
language) each of which deals with one or more of these namespaces;

- you want to use all these schemas to validate the instance.

It's an evolution of the ideas pioneered by Murata Makoto in RELAX
Namespace.

The sample implementation only allows the schemas to be in the languages
implemented by Jing: RELAX NG, RELAX NG Compact Syntax, and (recursively)
MNS.  However, the language is not so restricted and can potentially work
with any schema language for XML.

James