| 1345-1400 | Welcome by chairs | |
| 1400-1415 | cwm rules | Tim Berners-Lee, W3C |
| 1415-1430 | SweetRules: Tools for RuleML Inferencing and Translation | Benjamin Grosof, MIT |
| 1430-1445 | OO jDREW: A Java-Based Rule Engine for Object-Oriented RuleML | Harold Boley, Marcel Ball, and Bruce Spencer, National Research Council of Canada and U. New Brunswick |
| 1445-1500 | FLORA 2 | Michael Kifer, Stony Brook University |
| 1500-1515 | Discussion | |
| 1515-1530 | Break | |
| 1530-1545 | Hoolet | Sean Bechhofer and Ian Horrocks, University of Manchester |
| 1545-1600 | Use of SWRL for Ontology Translation | Mike Dean, BBN Technologies |
| 1600-1615 | Rule based inference support in Jena2 | Dave Reynolds, HP Laboratories |
| 1615-1630 | ROWL: Rule Language in OWL and Translation Engine for JESS | Norman Sadeh, Fabien Gandon, and Mithun Sheshagiri, CMU |
| 1630-1635 | Overview IBM CommonRules 4.0 | Hoi Chan, IBM |
| 1635-1650 | TRIPLE: an RDF query, inference, and transformation language for the Semantic Web | Andreas Harth, DERI |
| 1650-1700 | Discussion | |
The applet version of OO jDREW (http://www.jdrew.org/oojdrew), a Java-based OO RuleML engine, is presented. OO jDREW uses subClassOf taxonomies from RDFS for order-sorted unification and combines forward (data-driven) with backward (query-driven) reasoning. Interaction employs the POSL presentation syntax (http://www.ruleml.org/submission/ruleml-shortation.html) or directly OO RuleML markup. A sorted discount example and the New Brunswick Business Knowledge Base use case (http://www.ruleml.org/usecases/nbbizkb) will be run.
Rule based inference support in Jena2Jena is a well-known Java toolkit for developing semantic web applications. It supports RDF, RDFS, OWL (and legacy DAML) through a rich API and a comprehensive set of tools (including parsers, serializers, stores, and query processing).
In August 2003 we released a substantial new version of Jena, Jena2. Among many internal and external enhancements a key goal for Jena2 was to offer inference capabilities. This currently comprises a simple open API to support multiple inference engines and a suite of built-in rule based engines. These rule engines are used as the implementation vehicle for supporting different profiles of RDFS and OWL inference, but are also directly exposed to developers in the form of a GenericRuleReasoner which can be used for general rule-based processing of RDF data.
The Jena2 rule reasoner offers both a forward production engine and an LP-style (tabled) backward chaining engine. A novel feature of the design is that that these two can coupled together in a hybrid execution mode that allows rule developers to trade-off eager v. lazy processing.
In this talk we'll briefly sketch how inference fits into the Jena2 framework and then outline the rule engines provided.
This presentation will provide an overview of ROWL, a rule language in OWL, and an associated translation engine for JESS. We will discuss our experience using ROWL and extensions we have developed to capture and enforce privacy policies, decision rules and automated service identification rules in the context of several application environments. If time permits, the presentation will also include a description of rule editing functionality we have developed. Finally, we will attempt to contrast ROWL with other similar efforts aimed at adding rules to the the Semantic Web.
Relevant URLs:
ROWL: http://mycampus.sadehlab.cs.cmu.edu/public_pages/ROWL/ROWL.html
MyCampus project: http://almond.srv.cs.cmu.edu/~sadeh/mycampus.htm
Extensions of ROWL for privacy and context awareness:
http://almond.srv.cs.cmu.edu/~sadeh/Publications/Small%20Selection/Semantic_Web_Technologies_ArticleWSJ.pdf
CommonRules developed by Benjamin Grosof and Hoi Chan in IBM T.J Watson Ctr is a rule-based framework for developing rule-based applications with major emphasis on maximum separation of business logic and data, conflict handling, and interoperability of rules. It is a pure Java library, and it provides a platform that enables the rapid development of rule-based applications through its situated rule engine via dynamic and real-time connection with business objects. CommonRules can be integrated with existing applications at a specific point of interest, or it can be used to create applications composed only of rules. CommonRules uses a sematically-rich rule language called CLP (Courteous Logic Program) to enable direct conflict resolution through conditional mutual exclusion and prioritized override. CommonRules 4.0 extends CommonRules 3.3 to include a prototype GUI to allow easy composition of rules. It also includes a set of new features which allow building and persistence of relationship which forms the basis of using CommonRules 4.0 as a knowledge server.
Date: May 22, 2004
Location: New York, NY USA