Re: Modularity (was: Linkbases,Topic Maps,and RDF Knowledge Bases -- hel
Steven R. Newcomb scripsit: > Actually, fetching the resources does not, in the general > case, permit us to determine that the resources have the > same identity. Oh yes, I know. I hammered on that point over and over on xml-uri among other places: Octet identity of entity bodies is neither necessary nor sufficient for identity of resources. The official line is that resources are identical iff their URIs are identical, although I take a more relaxed view: two URIs may refer to the same resource if the owner says so. For example, ftp://ftp.reutershealth.com/home/internal and http://ftp.reutershealth.com:8181/home/internal are according to me the same resource. (Don't bother going there.) But I was addressing a different point: namely, the undecidability of whether two syntactically different XPointers point to the same part of a given document without examining the document. For XLink purposes, they are the same if they refer to the same thing in document; for RDF purposes, they are the always different. -- John Cowan cowan@c... One art/there is/no less/no more/All things/to do/with sparks/galore --Douglas Hofstadter
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