RE: URI indigestion
I would expect the syntax to work. What about the need to prevent ambiguity? IOW, in the SGML world, a public ID depends just like a URI on the system that establishes it to ensure qualities such as uniqueness. What SGML said, AFAIK, was that SGML was not obliged to do that (there being no definitive SGML system per se) and that someone using a public ID should work out a system. So if the Public ID is used in RDF for the Semantic Web, where does uniqueness get conferred? As I understand the decision to use URIs, it was based on getting uniqueness for free. The problem comes of http:// being overloaded if one stuffs it in there "in name only". John can probably answer that and/or correct my misunderstanding if any. Further, there is the issue that URIs designate representations of resources and that these can vary over time/space/authorial_intent, etc,. and that this conflicts with the RDF requirement for insisting that the URI uniquely identifies one thing. 1. What is the one thing that it identifies for URIs? 2. Are these resources (can only be one) or representations (can vary)? I'm trying to understand if this is a real problem (needs a constant; used a variable) or a categorical error (says a resource, but a representation is meant). IOW, given the varying aspects of representations, it seems that RDF really needs and wants non-varying URNs for which urn:publicID is a possible solution but requires a different means to enforce uniqueness. Yes/No/Mu? len From: Bill de hOra [mailto:dehora@e...] > From: Bullard, Claude L (Len) [mailto:clbullar@i...] > > > What would be the impact on RDF if it used these > instead of URIs? None, if we forget for a moment that RDF specifies URIs. Today, urn:publicid: works fine for RDF, so do tag: URIs.
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