[uf-discuss] Re: A (big) problem with XFN: identity of source and
target not findable
Toby A Inkster
mail at tobyinkster.co.uk
Tue Mar 18 07:29:37 PST 2008
David Janes wrote:
> FOAF is, quite frankly, an ugly mess. This, based on my experience of
> trying to code to extract useful information out of it rather than just
> an opinion I pulled out of the air. I spent way to many hours coding
> trying to pull info out of FOAF because, well, things seem to be doable
> in lots of different ways.
Don't try to parse it yourself -- use an RDF parser. I recommend Redland
(a.k.a. librdf) -- it's stable, has bindings for a bunch of different
language, and feature-wise seems to beat the competition hands down.
As far as relationships go, once the FOAF is parsed, it's just a matter of
looking for any subjects that have an rdf:type of foaf:Person and one or
more foaf:knows predicates. Each foaf:knows predicate will be a resource
(i.e. URI) representing a person that the subject knows. In terms of the
actual XML representing this kind of information, it's a nightmare to
parse, but once the RDF parser has reduced it to subject-predicate-object
triples, it's much easier to consume.
Recently I've been doing quite a bit of work on rationalising data
discovered from RDF and Microformats and integrating them into a single
http://examples.tobyinkster.co.uk/hcard (click "cognify")
FOAF and microformats *can* work nicely together.
Toby A Inkster BSc (Hons) ARCS
[Geek of HTML/SQL/Perl/PHP/Python/Apache/Linux]
[OS: Linux 126.96.36.199-mm-desktop-9mdvsmp, up 16:54.]
The Semantic Web
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