From: York Sure (sure@aifb.uni-karlsruhe.de)
Date: 12/21/04
*** Overview We would like to annouce the SEmantic portAL (SEAL) of the Institute AIFB at the University of Karlsruhe. Besides regular pages for human consumption, this portal also provides annotated pages which contain machine processable content in form of OWL annotations. [1] is not only a reference point for finding information about our SEAL, but also can be taken as a starting point to explore the capabilities of the portal by example links. Of particular interest might be the download of the complete OWL annotations in one ".owl" file (~2MB). *** OWL annotations The OWL Web Ontology Language [2] is designed for use by applications that need to process the content of information instead of just presenting information to humans. OWL is a W3C Recommendation and facilitates greater machine interpretability of Web content than that supported by XML, RDF, and RDF Schema (RDF-S) by providing additional vocabulary along with a formal semantics. Throughout the portal information about - Persons, - Publications or - Projects are retrieved from a relational database and presented to the user by XHTML. Such sites are also annotated by machine-understandable descriptions according to the SWRC (Semantic Web Research Community) ontology [3]. Both XHTML files and annotations are interlinked by the <link rel="meta"> tag. In addition, you may view the automatically generated information by clicking on the "OWL/RDF" button on pages about Persons, Publications or Projects. The button is located at the bottom of each annotated page. The annotations have been successfully tested with OilEd 3.5.7 and Protege 3.0 beta, OWL Plug-In Version 1.3, Build 212. All of them validate correctly against OWL Lite according to the WonderWeb OWL Validator. Note that we use the OWL DLP (Description Logic Programs) fragment [4] for the annotations, which is a subset of OWL Lite. Its expressivity is equal to Datalog while keeping as much of the Description Logic primitives as possible. *** General Architecture For further information about the general architecture please cf. to our SEAL approach [5]. *** References [1] About the AIFB SEAL http://www.aifb.uni-karlsruhe.de/about.html [2] W3C OWL recommendation http://www.w3.org/TR/owl-features/ [3] SWRC ontology http://ontoware.org/projects/swrc/ [4] OWL DLP http://logic.aifb.uni-karlsruhe.de/ [5] Jens Hartmann, York Sure. An Infrastructure for Scalable, Reliable Semantic Portals. In: IEEE Intelligent Systems 19 (3): 58- 65. May 2004. -- Dr. York Sure Institute AIFB, University of Karlsruhe (TH) phone: +49 (0) 721 608 6592 http://www.aifb.uni-karlsruhe.de/WBS/ysu
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