This is a drive-by response to David's 'namespaces to the rescue' post, where he says:
a table of synonyms that’s compiled manually and/or automatically by doing clustering analysis can enable us to tag local but search global. Or if generalized tag sets emerge (and I think they will, albeit not truly globally), we can use them as well as our local tags. For example, if a tag set called “AmeriTag” emerges, we could tag a photo as [ameritag:hotdog food_eating_contest obscene_idiots], where the second tags are purely our own. (Namespaces to the rescue!)
rel="tag" model takes a URL (not a URI) as the tag parameter. URLs have namespaces. In this case we have a choice of tagspaces - using http://tehcnorati.com/tag/[tagname] is one way to do it, but of course you can use Wikipedia or AmeriTag or whatever tagspace you like that is disambiguated as your link.
However, by making them URLs that actually locate something useful, they make sense as visible links within your posts.
If the XML notion of namespace is meant here, the names of namespaces are indeed URIs, not URLs and there is no requirement that there be anything at the target of a URL used for such a URL, intelligible or otherwise. Sorry. It's an out-of-band deal with the namespace URI as a discriminator of namespace identity. Heh.
But I'm not sure that is material to Clay's observation and I will desist. I love the earlier rant about ontologies. I think the problem of constraining the future is exactly where it comes apart, along with misguided and simplistic forcing of conceptual hiearchies at the outset.
Posted by orcmid on January 25, 2005 01:26 AM | Permalink to CommentOops. OK, I also don't think URLs have namespaces at all (there's no one-to-one about namespaces), and I apologize for blurring Kevin and Clay together here. And I strongly support Clay's view with regard to ontologies.
Posted by orcmid on January 25, 2005 01:32 AM | Permalink to CommentWhat do you do when the URL breaks? Is the tag declared dead? Do you have "semantic rot"?
Posted by Peter Clay on January 25, 2005 03:56 AM | Permalink to CommentThrive Learning897 on My book. Let me Amazon show you it.
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Excerpt: Basically, URLs would make the tags unique and identifiable. Perhaps a definition at the other end. This sounds like a proposal at a further stage of formality than most tagging behavior....
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