http://www.leibnizcenter.org/users/rinke "Time is nature's way to keep everything from happening at once." - John Wheeler Fri, 10 Oct 2008 07:15:25 +0000 http://backend.userland.com/rss092 en Last week I gave a presentation at the EKAW 2008 conference on the paper I wrote together with Joost Breuker entitled Polishing Diamonds in OWL 2: Rinke Hoekstra and Joost Breuker. Polishing diamonds in OWL2. In Aldo Gangemi and Jérôme Euzenat, editors, Proceedings of the 16th International ... http://www.leibnizcenter.org/users/rinke/2008/10/10/ekaw-2008-polishing-diamonds-in-owl-2/ From the W3C Website: The OWL Working Group published seven documents yesterday relating to the OWL 2 Web Ontology Language. OWL 2 extends OWL, a core standard of the Semantic Web, adding new features that users have requested and that software providers are prepared to implement. The documents are: Structural Specification and ... http://www.leibnizcenter.org/users/rinke/2008/10/10/seven-owl-2-drafts-published/ While at the EKAW 2008, I wrote a small Protege 4 plugin that adds marker properties to all classes. The subproperty hierarchy will reflect your class hierarchy. Marker properties are properties that 'represent' classes in the role box of your OWL 2 DL ontology. Classes are marked using a self restriction ... http://www.leibnizcenter.org/users/rinke/2008/10/08/addmarkers-protege-4-plugin/ The OWL WG of the W3C is currently discussing whether the OWL2 language should include a universal role, i.e. a top property that relates all individuals in the domain (see e.g. ISSUE-112 and email thread). Although it was already present in the SROIQ description logic that lies at the heart ... http://www.leibnizcenter.org/users/rinke/2008/05/30/universal-role-topproperty/ Nice (short) talk by Steven Pinker on his book "The Stuff of Thought": http://www.leibnizcenter.org/users/rinke/2008/05/24/steven-pinker-the-stuff-of-thought/ Last thursday I gave a talk at the University of Manchester KR course (Bijan Parsia and Sean Bechhofer) about issues for knowledge representation in the legal domain. The slides are online here. http://www.leibnizcenter.org/users/rinke/2007/12/10/knowledge-representation-in-the-legal-domain/ Yesterday I was playing around with Peter Mika's BuRST to create an RSS 1.0 feed of the publications of the Leibniz Center. We already use bibtex2html to generate a weekly update of our publications page. BuRST services are used, amongst others, by the openacademia.org project to generate RSS feeds of the ... http://www.leibnizcenter.org/users/rinke/2007/11/06/converting-bibtex-to-rss-feeds-bib2rss/ Bijan Parsia introduced the ideas of a SPARQL-like language that uses DL constructs at the ESWC 2007 OWLED workshop. The guys at Clark&Parsia really got busy, and the first implementation of SPARQL-DL will be introduced as part of Pellet. While reading the more recent post, about query optimization, I wondered whether ... http://www.leibnizcenter.org/users/rinke/2007/11/03/sparql-dl/ Yesterday I gave a presentation at our monthly department meeting about the nuts 'n bolts of the SemanticWeb. This was to give them a taste of its coolness. If you're interested, here it is: semweb-nuts-bolts.pdf http://www.leibnizcenter.org/users/rinke/2007/11/02/semanticweb-nuts-n-bolts/ I am the representative for the University of Amsterdam at the newly started OWL Working Group. The OWLWG is to develop the next version of the Web Ontology Language. Recent developments in the DL field are very promising (cf. the OWLED workshops), and I am excited about the new features that ... http://www.leibnizcenter.org/users/rinke/2007/10/01/owl-working-group/