Rules on the Web Track

Co-Chairs: Benjamin Grosof, Mike Dean, Harold Boley

Brief Description

This track will present tools and applications for rules on the web, including business policies, web services, and other applications. This includes use of rules in, or for, the (RDF, OWL) semantic web, as well as rules for the XML web, and rules in combination with web services and/or other web techniques/protocols.

Schedule

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 IBM CommonRules Update Hoi Chan, IBM
1635-1700 Discussion

Abstracts

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

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 Jena2
Dave Reynolds, HP Laboratories

Jena 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.


ROWL: Rule Language in OWL and Translation Engine for JESS
Norman Sadeh, Fabien Gandon, and Mithun Sheshagiri, School of Computer Science, Carnegie-Mellon University

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