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Re: NVDL: A Disruptive Technology

  • From: Jonathan Robie <jonathan.robie@r...>
  • To: "Costello, Roger L." <costello@m...>
  • Date: Mon, 12 May 2008 06:50:26 -0400

Re:  NVDL: A Disruptive Technology
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 

I'm guessing this requires a level of sophistication more common on this 
list (yes, I use multiple schema languages) than in the world as a 
whole. This doesn't feel like something heading toward mainstream.


Costello, Roger L. wrote:
> Hi Folks,
> Here are the evolutionary (disruptive) changes I envision NVDL bringing
> about in the marketplace:
> 1. Opens the marketplace to utilizing a variety of schema languages.  
> Previously, you and all your trading partners were locked into using
> one schema language (typically W3C XML Schema) if you wanted
> interoperability.  With NVDL that limitation is lifted and you can
> achieve interoperability while using a variety of schema languages.
> 2. Promotes using the right schema language for the right job. 
> XML Schema and Relax NG are two schema languages for expressing
> grammar-based rules. They are both standards, the former a W3C
> standard, the later an ISO standard.  Although their capabilities are
> largely overlapping, there are important differences.  "Use the right
> tool for the right job" is an adage that applies to choosing a schema
> language. Knowing the differences in capabilities is important to
> making a good decision in choosing a schema language. 
> 3. Encourages the creation of small, simple, independent schemas,
> written in any schema language.  
> Rick Jelliffe captures this nicely in his article "Standardize The
> Jellybeans Not The Jars"
> http://www.oreillynet.com/xml/blog/2007/11/standardize_the_jellybeans_n
> ot.html
> 4. Moves the application developer's focus from: 
>        "using a schema" 
>    to:  
>        "using XML vocabularies"
> Can you think of other changes that NVDL may bring about in the
> marketplace?
> /Roger
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