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Subject: re: Possible extensions to RELAX NG
Message text written by Martin Bryan > In talking to James Clark earlier today about the relationship between RELAX NG and the proposed new ISO Document Structure Definition Language (DSDL) James asked if I could provide some use cases that would justify the initial set of requirements that the DSDL proposal contained. The attached document starts by listing the requirements identified as being essential for DSDL, and then provides a set of use case statements that seeks to justify each requirement. It also contains brief use cases for supporting three optional features of SGML that are not supported by XML, and not listed as being requirements for DSDL, but for which cases can be made within data streams being used by businesses. Martin Bryan The SGML Centre <<<<<<<<<<<<< Martin, This is all interesting. When I look at the attached work we've been doing on Core Components - it appears to me that alot of the issues are also plumb in the middle of how well does an ebXML Registry and Core components support these business needs? Section 2 - XML Implementation is the main point of interest. I've been taking a "syntax neutral" (i.e. plain vanilla XML V1.1) approach so far to the ebXML Registry work. However - laterly I've also been looking at how well RELAX performs as the preferred structure assembly representation for ebXML. And finding the same shortcomings as you - but from a different aspect - the ebXML Core Component + Registry services can effectively fill these gaps. Of course this all shows that there is more than one way to skin a cat. Choices are: 1) XML V1.1 parser + ebXML library and core components. 2) XML V1.1 parser + RELAX extensions and core components. 3) W3C XSchema + schema capable parser. Anyway - what I did find interesting is that the various nuances that a Core component requires also challenges the W3C syntax too.... no big surprises there! All this raises interesting questions as to the strategic approach here to providing business facilitation. Cheers, DW.
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