Re: URN Madness (was re: Overloaded URIs must GO!)
At 01:24 PM 5/28/1999 -0400, David Megginson wrote: >(I notice that the URN drafts call these "namespaces" rather than >"schemes", so we will have to be careful to distinguish XML namespaces >from URN namespaces.) > >At www.ietf.org, I find the following: > >1. http://www.ietf.org/internet-drafts/draft-ietf-urn-nid-req-08.txt > > This document lists the requirements for registering a URN > namespace. > [The documents you don't need at the moment deleted.] > >Am I missing some other documents? As far as I can see, the only URN >namespace that is proposed in an IETF draft is the IETF namespace, and >I cannot use a URN in the IETF URN namespace to create my own XML >namespace. > >Where can I find the IETF draft documents describing URN namespaces >built on DNS, ISBN, UUIDs, etc.? Perhaps I just haven't looked in the >right place. > No, you're looking in the right place, it's just that IETF drafts for particular URN namespaces (other than IETF's own namespace) don't exist yet. The Internet Draft "URN Namespace Definition Mechanisms" that you mention above contains the details on how name spaces will be registered with IANA (in brief, and to quote the draft, "In a nutshell, a template for the definition of the namespace is completed for deposit with IANA, and a NID is assigned." The template is mailed to the urn-nid@a... mailing group for discussion, and if it's a formal URN namespace proposal, after two weeks discussion the template information gets issued as an RFC.). Once a URN namespace is assigned by IANA, the people/organization in charge of the namespace makes the rules about how identifiers are assigned within that namespace. Since the Internet Draft hasn't gone to RFC status yet, the mechanisms for handling this namespace assignment aren't completely in place. So, people like me who are already playing with URNs are using the 'experimental namespace' described in the Internet Draft, e.g., for a page image file on a project I'm working on, the URN would look like: urn:x-ucb:I0018235 where x-ucb is the URN namespace, and as it's experimental, there's no guarantee there won't be a collision of namespaces with somebody else (no big deal for me at this point, given how I'm using URNs). Once the Internet Draft goes to RFC status, I expect quite a few people will start registering formal URN namespaces, and at that point, you'll start seeing a lot of non-standards track RFCs for URN namespaces like ISBNs, SICIs, DOIs, etc. starting to appear. Again from the Internet Draft, "URN namespace registrations will be posted in the anonymous FTP directory 'ftp://ftp.isi.edu/in-notes/iana/assignments/URN-namespaces/'." Jerome McDonough -- jmcdonou@l... | (......) Library Systems Office, 386 Doe, U.C. Berkeley | \ * * / Berkeley, CA 94720-6000 (510) 642-5168 | \ <> / "Well, it looks easy enough...." | \ -- / SGNORMPF!!! -- From the Famous Last Words file | |||| 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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