- From: Sandro Hawke <sandro@w3.org>
- Date: Thu, 09 Jun 2005 12:24:32 -0400
- To: James Cerra <jfcst24_public@yahoo.com>
- Cc: semantic-web@w3.org
> What is the general (i.e. your) opinion on using the "tag:" URI scheme > <http://taguri.org/> to identify resources? To me it's an open question. My motivation in defining tag: URIs was to give people a place to go when they didn't want to use http URIs. > The first issue is the usefulness of the scheme. Some people in my group > expressed concern that they weren't an officially endorsed scheme. It is my > understanding that "tag:" is a RFC and also officially recognized by the IETF > . It's in the RFC pipeline; it was approved for publication by the IESG, but it takes a very long time to actually come out. But yes, it's "official", in some sense. > Are the following rules sensible? > > 1) If you do not have permanent control over the domain, get temporary > permission and use a "tag:" URI. If you can't get that, use a "urn:uuid:" > name. Tags can be based on e-mail addresses instead of a domain names, so you can just get a hotmail or yahoo e-mail address and use that, if you don't have appropriate access to a domain name. I'd say UUIDs are only good for machine generation and consumption. > 2) If it doesn't make sense to dereference your resource, use "tag:". One does not dereference resources, one dereferences names (URI). If you think of dereferencing a name as giving you useful information about the named thing, why would you ever not want to be able to do that? (Answer: if you don't want to have anything to do with a web server, I guess.) So if you really can't get http URIs to work for you, then sure, use tags. > 3) If it doesn't have a stable location over time, use "tag:". This is why > "file:" makes a poor choice of a scheme for resources shared with other peopl > e. Why would you not have a stable location over time? Domain names a very cheap, and purl.org names are free. > 4) If it is an ontology scheme, consider using a "http:' name. Otherwise, > choose the scheme that makes the most sense for that domain. Like what? - sandro (tag co-author)
Received on Thursday, 9 June 2005 16:24:40 UTC