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   [Fwd: Re: [xml-dev] Schematron/Schema market share]

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Hi all,

"Bullard, Claude L (Len)" wrote:

I don't know how far along anyone is, but a combination of the Schematron approach and the Schema approach as has been demonstrated by Rick Jeliffe looked very powerful.  Also, I think there was an announcement that Clark, Jeliffe, Holman et al were initiating ISO work to create a combined specification using RelaxNG.  Please any of the above correct me if I am wrong.I tested the Topologi implementation.  Regardless of the marketshare, I was impressed with the capabilities when working with a complex schema.  It actually caught errors that were not caught by systems with greater market share and was simple to use.  I found that combining it with a schema editor (XML Spy) was very productive.  I did not pursue the combinations of schematron assertions and schema productions very far, but it appeared to be a good way to go if co-occurrence constraints were a concern (and they usually are when the original model is a relational db).len
I'm currently working on a paper that will explain the details of embedding Schematron rules in the <xs:appinfo> element in a W3C XML Schema. I've put up a draft at [1] which contains some background, introduction to Schematron, examples of embedded Schematron rules and how the validation process works. The draft also contains a link to a zip file with all the examples used so you can try it out yourself.

All comments are welcome.

Cheers,
/Eddie

[1] http://www.topologi.com/public/Schtrn_XSD/Paper.html

----Original Message-----
From: Doug Ransom [mailto:Doug.Ransom@pwrm.com]
Sent: Friday, January 18, 2002 10:33 AM
To: Xml-Dev@Lists. Xml. Org (E-mail)
Subject: [xml-dev] Schematron/Schema market share
Does anyone out there use schematron in addition to schema?  I am guessing schematron has about 0.1 % of market share.  It looks like an interesting technology we may use to define some of our document formats that cannot be completely described in schema. If path or semantics dependancies exists in an XML document, I think it is reasonable to expect clients to validate with schematron if they choose;  otherwise, they can use schema with some custom imperative code (i.e. VB) to verify the semantic dependancies. 




 

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