Short for Ontology Inference Layer, OIL a Web-based representation and inference layer for ontologies, combining frame-based languages with the formal semantics and reasoning services. Its goal is to provide a general purpose markup language for the Semantic Web. OIL is compatible with RDF Schema. The OIL initiative is funded by the European Union IST program for Information Society Technologies under the On-To-Knowledge project (IST-1999-1013) and IBROW (IST-1999-19005).
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