[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] UPA and schema handling
I've been fiddling around with very simple schemas that violate the UPA constraint -- and have found that some schema tools flag UPA errors (e.g. oXygen), while others (e.g. XML spy) do not. This inconsistency is, at best, confusing -- but at worst would seem to lead to interoperability problems, since a designer could build a schema with one toolset and find it is not acceptable to another. So am I missing something here? Is UPA really an inviolable constraint [my interpretation], or is it just a guideline, in the manner of Appendix E 'Deterministic Content Models (Non-Normative)' in the XML 1.0 specification? And if it's just a guideline, would this not lead to interoperability problems as I've just outlined? And, if someone already went down this rat hole, can anyone refer me to the corresponding xml-dev (or other) thread ;-) Best -- Ian -- Ian Graham H: 416.769.2422 / W: 416.513.5656 / E:<ian . graham AT utoronto . ca>
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