bryan rasmussen wrote:

> I think this way is to interconnected and harder to maintain than the 
> following
> 
> 1. I write an xslt for documents in namespace x
> 2. someone wants to extend documents in namespace x with namespace y
> 3. they write an nvdl to validate these two namespaces
> 4. NVDL valid stream for Namespace x will be passed to my xslt
> 5. someone writes perl script for namespace y to save NVDL valid
> stream to filesystem.
> 
> or other similar scenarios which returning the streams would allow for.

Then you should use technology which will fit your needs. May be XProc 
(http://xproc.org/) will be the right technology for you. NVDL is just 
about validation, XProc allows (will allow, to be more precise) to 
create pipelines for XML processing composed from smaller operations 
like validation, transformation and so on.

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