Object-Oriented RuleML: User-Level Roles, URI-Grounded Clauses, and Order-Sorted Terms

  • Harold Boley
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2876)


This paper describes an Object-Oriented extension to RuleML as a modular combination of three sublanguages. (1) User-level roles provide frame-like slot representations as unordered argument collections in atoms and complex terms. (2) URI-grounded clauses allow for ‘webizing’ using URIs as object identifiers for facts and rules. (3) Order-sorted terms permit typed variables via Web links into taxonomies such as RDF Schema class hierarchies, thus reusing the Semantic Web’s light-weight ontologies. Besides introducing the first sublanguage with the Positional-Roled (ASCII) syntax, all three sublanguages are introduced with the OO RuleML (XML) syntax. Their semantics are sketched and their implementation paths are discussed.


Knowledge Representation Resource Description Framework Description Logic Class Hierarchy Reaction Rule 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Harold Boley
    • 1
  1. 1.Institute for Information Technologye-Business, National Research Council of CanadaFrederictonCanada

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