]> We prove that entailment for RDFS (RDF Schema) is decidable, NP-complete, and in P if the target graph does not contain blank nodes.We show that the standard set of entailment rules for RDFS is incomplete and that this can be corrected by allowing blank nodes in predicate position. We define semantic extensions of RDFS that involve datatypes and a subset of the OWL vocabulary that includes the property-related vocabulary (e.g. Functional- Property), the comparisons (e.g. sameAs and differentFrom) and the value restrictions (e.g. allValuesFrom). These semantic extensions are in line with the 'if-semantics' of RDFS and weaker than the 'iff-semantics' of D-entailment and OWL (DL or Full). For these semantic extensions we present entailment rules, prove completeness results, prove that consistency is in P and that, just as for RDFS, entailment is NP-complete, and in P if the target graph does not contain blank nodes. There are no restrictions on use to obtain decidability: classes can be used as instances. 2007-02-06 Horst, Herman J. ter: Completeness, decidability and complexity of entailment for RDF Schema and a semantic extension involving the OWL vocabulary 2007-02-06T23:27:39Z Les ateliers et les publications de la romancière Joëlle Guillais 2007-02-18T22:31:46Z 2007-02-18 The cost of monoculture 2007-02-13T00:23:44Z 2007-02-13 Without enough time to re-architect Korean websites, 3 S. Korean governmental ministries, warned S. Korean users that upgrading to Vista would disable the user from making any secure transaction online. Using labels to give semantics to tags - Design Issues 2007-02-08 2007-02-08T21:51:18Z This article discusses how the user interface metaphor of a luggage label cam used to associate metadata from well-defined ontology with tags from a particular context.<br/> I heard of one online community which was considering making a system to allow one formally to state when one has committed to use a given tag in the same way as another person, or growing mesh of people. That would be a very interesting feature, as it would allow a useful definition to gain growing acceptance, to progressively move from being a private idea to being a group global standard.<br/> The Semantic Web: The Origins of Artificial Intelligence Redux 2007-02-06 2007-02-06T21:55:44Z South American Archaeology: Paleo-Indian 2007-02-26T22:21:14Z 2007-02-26 2007-02-08 2007-02-08T23:31:16Z Semantic Web Tutorial Using N3 2007-02-24 2007-02-24T02:24:37Z Online Dictionary for French English, Spanish English, Italian English, and more. 2007-02-13 2007-02-13T21:26:18Z Installation d'OpenOffice.org 2 (version X11) Mac OS X PowerPC et Mac Intel Les 100 pièges de l'Anglais 2007-02-16T21:57:30Z 2007-02-16 Rules and Formulae 2007-02-08T23:34:27Z 2007-02-08 2007-02-06T21:45:16Z 2007-02-06 A Semantic Web Primer for Object-Oriented Software Developers Rather unnoticed from the main software engineering camps, the World Wide Web Consortium (W3C) has designed some very interesting technology in the context of its Semantic Web vision. This technology has been originally designed with the goal of making web pages easier to understand for intelligent agents and web services. Interestingly, however, it turns out that Semantic Web languages and tools could also play a major role in software development in general. Ryszard KAPUSCINSKI (1932-2007) - WODKA 2007-02-23T21:14:32Z 2007-02-23 > Je me soûlais au vin de palme depuis l'âge de dix ans. Je n'avais rien eu d'autre à faire dans la vie que de boire du vin de palme. Dans ce temps-là, il n'y avait pas d'argent, on ne connaissait que les cauris, aussi la vie était bon marché et mon père était l'homme le plus riche de la ville. > > Mon père avait huit enfants et j'étais leur aîné, les autres travaillaient dur, moi j'étais un recordman du vin de palme. (…] Quand mon père s'est aperçu que je ne pouvais rien faire d'autre que de boire, il a engagé un excellent malafoutier qui n'avait rien d'autre à faire qu'à me préparer mon vin de palme pour la journée. 2007-02-23 Un ivrogne dans la brousse 2007-02-23T20:56:34Z