Racer: A Core Inference Engine for the Semantic Web

In this paper we describe Racer, which can be considered as a core inference engine for the semantic web. The Racer inference server offers two APIs that are already used by at least three different network clients, i.e., the ontology editor OilEd, the visualization tool RICE, and the ontology development environment Protege 2. The Racer server supports the standard DIG protocol via HTTP and a TCP based protocol with extensive query facilities. Racer currently supports the web ontology languages DAML+OIL, RDF, and OWL. 1 Motivation The Semantic Web initiative defines important challenges for knowledge representation and inference systems. Recently, several standards for representation languages have been proposed (RDF, DAML+OIL, OWL). One of the standards for the Semantic Web is the Resource Description Format (RDF [11]). Since RDF is based on XML it shares its document-oriented view of grouping sets of declarations or statements. With RDF’s triple-oriented style of data modeling,...

• Type: Conference
• Year: 2003
• Where: EON
• Authors: Volker Haarslev, Ralf Möller
• Keywords: Conceptual Domain Models, EON 2003, EON 2007, RDF’s Triple-oriented Style, Semantic Web