RE: [xml-dev] NVDL: A Disruptive Technology

["Costello, Roger L." <costello@mitre.org>]

> I wonder how many users are actually eager to learn more 
> than one schema language, and willing to do so for the 
> benefits one language has over another.

I know multiple "programming" languages.  Each have their niche.  

Similarly, each of the "schema" languages - XML Schema, Relax NG, DTD,
Schematron - have their niche.

That said, "learning multiple schema languages" is a red herring.  The
fact is, people do use different schema languages, for whatever reason.
NVDL gives us the ability the abstract away from the particular schema
language being used and focus of utilizing the XML vocabularies
provided by the schemas.  That, in my opinion, is powerful ... and what
makes NVDL a disruptive technology.

/Roger