DAML+OIL - Documents for the March 2001 release of the DAML+OIL language.
Ontology Inference Layer - OIL was a proposal for a web-based representation and inference layer for ontologies, which combined the widely used modelling primitives from frame-based languages with the formal semantics and reasoning services provided by description logics.
OWL Working Group - The W3 Consortium working group for the Web Ontology Language.
RIF Working Group - The W3 Consortium working group for the Rule Interchange Format.
Semantic Application Design Language (SADL) - A language for building semantic models and expressing rules that capture additional domain knowledge. The SADL-IDE (integrated development environment) is a set of Eclipse plug-ins that support the editing and testing of semantic models using the SADL language.