mapping between SKOS and W3C Bookmarks vocabs

Hi,

We were talking about the relationship between SKOS and the W3C RDF bookmarks work at the SWIG meeting this morning, this mail is a first tentative bidirectional mapping between the two vocabs with caveats, as a basis for further discussion.

(N.B. I used the version of the bookmarks schema at http://www.w3.org/2002/01/bookmark which jose kahan tells me is out of date wrt the version used in the firefox plugin)

(Re below, danbri doesn't a bm:Bookmark look a lot like a content label?)

(Jose K please correct me if I used the bm vocab wrong) 

(Also somebody slap me if my N3 rule syntax is wrong, I tried to remember how it goes)

--------

@prefix bm: <http://www.w3.org/2002/01/bookmark#>.
@prefix skos: <http://www.w3.org/2004/02/skos/core#>.


# BM => SKOS
# ----------

{
?x a bm:Topic .
}
=>
{
?x a skos:Concept .
}

{
?x bm:subTopicOf ?y .
}
=>
{
?x skos:broader ?y .
}

{
?b a bm:Bookmark .
?b bm:recalls ?r .
?b bm:hasTopic ?t .
}
=>
{
?r skos:subject ?t .
}


# SKOS => BM
# ----------

{
?x a skos:Concept .
}
=>
{
?x a bm:Topic .
}

{
?x skos:broader ?y .
}
=>
{
?x bm:subTopicOf ?y .
}

{
?r skos:subject ?c .
}
=>
{
[] 	a bm:Bookmark ;
	bm:hasTopic ?c ;
	bm:recalls ?r .
}

--------

I think the above mapping is semantically appropriate.  But I think there is a practical difficulty with the semantics of the above mapping, because the meaning of a bm:hasTopic assertion will be highly variable and therefore ambiguous, and that therefore the skos:subject property is an innapropriate inference.  I expect that the meaning of placing a bookmark in a particular 'folder' (as many will see it) will vary within and across bookmark collections (The 'topic' will *not* always represent the *subject* of the bookmarked resource).  This ambiguity wrt the 'categorisation' of a bookmark is the motivation behind the 'rude categorisation' suggestion I posted to public-esw-thes@w3.org today - see http://lists.w3.org/Archives/Public/public-esw-thes/2005Mar/0001.html

Cheers,

Alistair.

---
Alistair Miles
Research Associate
CCLRC - Rutherford Appleton Laboratory
Building R1 Room 1.60
Fermi Avenue
Chilton
Didcot
Oxfordshire OX11 0QX
United Kingdom
Email:        a.j.miles@rl.ac.uk
Tel: +44 (0)1235 445440

Received on Tuesday, 1 March 2005 20:37:09 UTC