Application of Active Real-Time Objects and Rules in Semantic Web

Abstract

AbstractAs more real-world data are included in the Web, requirements to capture more meaning of the data have rapidly increased. Semantic Web has been proposed by W3C to be the next generation of web by representing the metadata using RDF (Resource Description Framework). Even though the metadata encoded in RDF have rich semantics and high potential for providing lots of intelligent features, there have not been enough efforts to utilize them in practical Web application areas. In this paper, we model the Semantic Web as an active environment that consists of a set of real-time objects each consisting of a set of attributes, functions, and active rules. A real-time object can be changed spontaneously or triggered by demands (via messages) in real-time. The semantics of such a distributed, real-time object system can be described completely by a formal logical foundation that is the ordinary first order language (that is time-invariant) plus a set of time-varying constructs. The declarativeness and inference capability of formal logic are coupled with real-time distributed objects in order to enable the users to encode easily the domain knowledge into rules. The design and application of active real-time objects and rules are presented using working examples.KeywordsResource Description FrameworkIntegrity ConstraintCondition PredicateResource Description Framework DataGraph Resource Description FrameworkThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.