[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Just require URLs
A pedantic point to clarify some of the confusion over '/' in URNs and URLs. RFC 2141 (the URN syntax spec) says that forward slashes SHOULD NOT be used in their unescaped form. The pedantic point is that to really really really forbid this, the spec would have said MUST NOT. (And I know for a fact that the choice of SHOULD NOT vs. MUST NOT was deliberate in this case). The use of '/' gets bound up with the question of 'relative URNs' and whether they are meaningful. The working group did not reach consensus on that point, so the compromise was to discourage the use of '/' but not totally forbid it. RFC 2396 is correct here. You MUST use '/' to denote hierarchy. If you want to use them for something else you MUST %encode them. If you want to do URNs with hierarchical levels in them, you MAY use '/' but you SHOULD NOT. (The reason for that, as I recall, is that it is very easy to break relative URNs.) Speaking personally, if I were sure that I would not be doing relative identifiers, I wouldn't let the "SHOULD NOT" stop me from using '/'. regards, Ron Daniel Jr. 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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