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Following a recent thread [1] on www-tag lead me to the conclusion [2] that PIs are an out of band signalling mechanism and reminded me an old issue [3] which is yet to be solved. It might even be more than a rough syntactic trick and PSVI information are nothing more than insformation (or instructions) to process a document. This proposal would thus use PIs for what they've been designed for! So, why not use PIs to embedd PSVI information in instance documents? It would not meet my intial requirement of being easy to process with a simple XPath expression, but would still meet the other requirements of interoperability and persistence of the PSVI and would have 0 effect on existing applications (the adorned document would even still be a valid document per its original schema). Eric [1] http://lists.w3.org/Archives/Public/www-tag/2002Feb/0057.html [2] http://lists.w3.org/Archives/Public/www-tag/2002Feb/0161.html [3] http://lists.xml.org/archives/xml-dev/200110/msg00556.html -- See you in Seattle. http://knowledgetechnologies.net/ ------------------------------------------------------------------------ Eric van der Vlist http://xmlfr.org http://dyomedea.com http://xsltunit.org http://4xt.org http://examplotron.org ------------------------------------------------------------------------
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