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I think it's also important to point out that one of the reasons that the core composition mechanisms of W3C XML Schema give a great deal of latitude as to how schemas are assembled. Speaking for myself, I believe this has been done in part so that others can create schema repositories for various purposes. It's my intuition that different sorts of repositories will be needed according to the circumstance. For example, IBM's DB2 product has particular mechanisms that it uses to store schemas in its relational/XML store, and to decide which ones to use for particular validations. So, it's not clear to me that there is one particular repository that the Schema WG "should" have defined in the core recommendation. Still, I believe there are few architetural impediments to layering on such repositories if they're needed, much as various different code repositories can be integrated to support the build and runtime environments of languages like Java. -------------------------------------- Noah Mendelsohn IBM Corporation One Rogers Street Cambridge, MA 02142 1-617-693-4036 -------------------------------------- "Michael Kay" <mike@s...> 10/16/2007 02:14 PM To: <abcoatesecure-xmldev@y...>, "'XML-dev list'" <xml-dev@l...> cc: (bcc: Noah Mendelsohn/Cambridge/IBM) Subject: RE: Blog post on limitations of import/include in W3C XML Schemas Useful input. We're doing some work on schema composition in the Schema WG right now. I don't think it will include any kind of concept of repositories, but it does aim to achieve a better balance between interoperable/predictable behaviour and extensible/customizable behaviour than we have now. At present there's enough abstraction built in to meet the needs of most scenarios, I think, but too much abstraction to achieve interoperable behaviour in all but the most simple cases. Michael Kay http://www.saxonica.com/ > -----Original Message----- > From: Anthony B. Coates (XML-Dev) > [mailto:abcoatesecure-xmldev@y...] > Sent: 16 October 2007 18:20 > To: XML-dev list > Subject: Blog post on limitations of import/include > in W3C XML Schemas > > I've just published a blog post on limitations that I've > found in practice with the import/include mechanisms that W3C > XML Schemas provide. See > > http://kontrawize.blogs.com/kontrawize/2007/10/the-trouble-wit.html > > Comments are welcome. > > Cheers, Tony. > -- > Anthony B. Coates > Senior Partner > Miley Watts LLP > Experts In Data > UK: +44 (20) 8816 7700, US: +1 (239) 344 7700 > Mobile/Cell: +44 (79) 0543 9026 > Data standards participant: genericode, ISO 20022 (ISO 15022 > XML), UN/CEFACT, MDDL, FpML, UBL. > http://www.mileywatts.com/ > > ______________________________________________________________ > _________ > > XML-DEV is a publicly archived, unmoderated list hosted by > OASIS to support XML implementation and development. To > minimize spam in the archives, you must subscribe before posting. > > [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ > Or unsubscribe: xml-dev-unsubscribe@l... > subscribe: xml-dev-subscribe@l... List archive: > http://lists.xml.org/archives/xml-dev/ > List Guidelines: http://www.oasis-open.org/maillists/guidelines.php > _______________________________________________________________________ XML-DEV is a publicly archived, unmoderated list hosted by OASIS to support XML implementation and development. To minimize spam in the archives, you must subscribe before posting. [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ Or unsubscribe: xml-dev-unsubscribe@l... subscribe: xml-dev-subscribe@l... List archive: http://lists.xml.org/archives/xml-dev/ List Guidelines: http://www.oasis-open.org/maillists/guidelines.php
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