Douglas,
Have you seen Richard Newman's Tag Ontology [1], which I mentioned back
at [2]?
It's a while since I looked at it, but I think it covers much of what
you propose.
It supports two approaches, I think
(i) using a tags:taggedWithTag property to relate the described resource
to the tag-as-resource (much as you suggest, I think)
(ii) a slightly richer/more complex approach which models a relationship
between the described resource and a "tagging" as an event (using a
different property tags:tag), with that tagging-as-event in turn related
to a tag-as-resource (and an agent and a date/time). That approach is
rather neat because it allows you to capture a lot of information about
the "context" of the tagging: it was done by Douglas yesterday morning
etc
I agree with you that the thing-tag relationship is not a subpropery of
dc:subject because a tag doesn't always indicate "topic". But I'd also
be reluctant to say the thing-tag relationship (e.g. tags:taggedWithTag
in (i) or some alternative property) is a subproperty of dc:description.
I say that because I don't think a tag necessarily provides "An account
of the resource". It all depends what "account" means and what a "tag"
is, I suppose! :-) But given that people provide tags for concepts as
diverse as "resource type" (video, article etc), "level of
interestingness", or things like "on my to-read list" or "on my to blog
about list", I'm not convinced all of these are "accounts of the
resource".
But that's OK - we don't _have_ to make properties subproperties of
DCMI-owned properties, and it's still useful to have the relationships
that the Tag Ontology provides. I suppose if you really wanted to, you
could argue it's a subproperty of dc:relation, but I'm not sure that's
particularly useful because a use of the dc:relation property tells me
so little.
Pete
[1] http://www.holygoat.co.uk/projects/tags/
[2]
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0611&L=DC-SOCIAL-TAGGIN
G&T=0&F=&S=&P=435
---
Pete Johnston
Technical Researcher, Eduserv Foundation
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+44 (0)1225 474323
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