[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Overloaded URIs (was Re: XLink: behavior must go!)
Speaking about namespaces, Nikita Ogivetsky wrote "And in some cases like with xsl, xlink, etc. the alias itself becomes unique ( even though one can use the word "reserved"). And the URI becomes a version number." What do you mean by this? Do you mean that sometimes a namespace prefix is an alias to a URI, where the particular prefix is immaterial and it is the URI that identifies the namespace, while at other times the namespace is identified by the specifc prefix employed? If this is your meaning, I recommend that you study sections 1, 2 and 3 of the namespaces specification, http://www.w3.org/TR/REC-xml-names/, paying particular attention to the exact definitions of the various terms and to the sentance reading "Note that the prefix functions only as a placeholder for a namespace name. Applications should use the namespace name, not the prefix, in constructing names whose scope extends beyond the containing document." Another useful document to read is Tim Berners-Lee's "Web Architecture from 50,000 feet" at http://www.w3.org/DesignIssues/Architecture.html, particularly the passage "Guidelines for new Web developments are that they should respect the generic definition and syntax of URIs, not introduce new URI schemes without due cause, not introduce any different scheme which puts itself forward as to be universal as a superset of URIs which would effectively require information apart from a URI to be used as a reference. Also, in new developments, all significant objects with any form of persistent identity should be "first class objects" for which a URI exists. New systems should use URIs where a reference exists, without making constraint on the scheme (old or new) which is chosen." xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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