Subject: re: Show Stopper 2 Problem Statement
Message text written by Martin Bryan > No mechnaism is defined within the ebXML Constraint language to record relationships between elements. It is not, therefore, possible to state that element X may only occur if element Y is present (unless they are siblings and two choices of model are defined) or that element X must occur if element Y contains value Z. I had worked out a way that this could be done using W3C XML Schemas, but the decision of the group that the constraint language must be capable of generating any type of XML validation mechanism, including DTDs, Schematron, etc, makes it impossible to come up with any mechanism for expressing such relationships that can be consistently applied. Martin Bryan The SGML Centre <<<<<<<<<< Martin, Never say impossible! However I agree with your observation of the current limitations. I was also confused as to why the information model and documentation were not in the submission - or did I miss something in all those sub-documents? Without the information model its easy to see why errors such as the one you note have occurred, and further more - I would expect QR to instantly require the info' model to facilitate their own review process?! DW.
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