Semantic Web Interest Group IRC Scratchpad

Welcome to the Semantic Web Interest Group scratchpad generated automatically from discussions on IRC at Freenode channel #swig 2001-2018 approx by the chump bot.

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last updated at 2004-11-11 10:38
dajobe: "Running this, we get (at the time of writing) python is related to RDF"
CLoCKWeRX: does this tie in with w3c's Annotea on any other level than "purpose"?
peepo: the start button would seem to be really useful for sorting and arranging complex rdf
peepo: worked well for me with
libby: by Yannis Kalfoglou, Harith Alani, Marco Schorlemmer, Chris Walton
libby: [I didn't see it but apparantly interesting]
libby_: oh here'\s the full paper preprint in pdf without login
libby_: by David Karger, Dennis Quan
libby_: ISWC 2004 talk
libby: some of Dennis's examples looks like Steve Cayzer's semantic blog - capturing semantics at the point of blogging
libby: "e.g. blogging about conference papers - blogging as annotations"
libby: by Kaoru Hiramatsu, Jun-ichi Akahani, Tetsuji Satoh
libby: a related paper (pdf)
libby: is there a list of the candidates not in pdf somewhere?
libby: final programme (pdf) contains a list of the apps selected
libby: 3rd - semnatic organiser from nasa
libby: 2nd - MuseumFinland
libby: 1st - flink - peter mika (nice one peter!)
libby: [all good stuff but I've been most impressed by swoogle recently, which was also in the running]
libby: flink uses sesame :)
libby: the apps they've had don't use any deep reasoning...any other out there?
libby: by Sean Bechhofer, Raphael Volz
libby: with separate markup
libby: presentation in ISWC 2004 ontologies track
libby: "aim is to see what owl is out there, whether it's DL/lite or not. result is that most of it is not, but for reasonably trivial reasons, i.e. it can be 'fixed' without affecting the semantics"
libby: sean shows Danny Ayers' version of the layer cake from his talk at the tech plenary in march
libby: "76 available, valid xml ontologies from the daml site (out of 250), only 13 were DL/Lite"
libby: "common 'errors' they found: missing typing (in OWL DL everything must have a specific type, a syntactic restriction); some namespace issues - can't define more terms in owl ns, collectiosn should be disjoint (thoough you may want them not to be)"
libby: "...wrong vocabulary - rdfs class is redundant; rdfs property should be owl object or data property; can't use owl:sameAs with owl:class (same object vs same extension)"
libby: "...illegal property use, e.g. complex properties definded as transitive; RDF irregularies"
libby: they also got data form google, scribed missed how....
libby: "missing type information was the most common problem in 98-100% of ontologies"
libby: "can use their owl validator to check and now patch these issues"
libby: "can use their owl validator to check and now patch these issues - website"
libby: "don't import the owl vocabulary - only want to do this if you are redefining the owl language."
libby: "can patch by changing sameeas to equivclass, and remove imports...but this changes the semantics, so have to be very careful (and not do it silently)"
libby: "results - patching seems to work quite well - can fix about 1/3"
libby: by Hui Siu Cheung, Fong Alvis C. M., Tru Hoang Cao
libby: presentation in ISWC 2004 ontologies track
libby: "uses fuzzy logic to generate a concept hierarchy using data about academics"
libby: by Jerome Euzenat
libby: presentation in ISWC ontologies track
libby: "alignment is: 2 aligned entities, the alignment relation (e.g. equality, fuzzy), and degree of confidence"
libby: "an rdf output format for this sort of mapping information"
libby: "they've used it for benchmarking ontology alignment systems"
libby: "aim is to create and publish alignments, leave them lying around the web, fine them, improve them, manipulating and comparing them"
libby: "they have produced a java api for alignment"
libby: demo
libby: related web page - with various links
jeen: ISWC presentation by Peter Haase
jeen: "Bibster is one instance of a generic architecture for semantics based p2p systems"
jeen: "queries are executed locally on the repository (Sesame), or forwarded to other peers"
jeen: "metadata extracted from BibTeX files, using the SemWeb Research Community Ontology and ACM Topic hierarchy as light-weight ontologies"
jeen: "Peer selection is expertise-based, by advertising. ads use terms from the ontology to communicate expertise"
jeen: "field experiment over several months, involving ~400 users/peers, results on user experience and system performance"
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