Ontologies tend to be found everywhere. They are viewed as the silver bullet for many applications, such as database integration, peer-to-peer systems, e-commerce, semantic web services, or social networks. However, in open or evolving systems, such as the semantic web, different parties would, in
OpenCyc is the open source version of the Cyc technology, the world's largest and most complete general knowledge base and commonsense reasoning engine.
The OntoWare Group provides organizational and legal support for a broad range of Semantic Web related software projects. Through a collaborative and meritocratic development process, OntoWare projects deliver enterprise-grade, freely available software products that attract large communities of users.
The UMBEL project is a community one with participation encouraged. We welcome criticisms, testing, debate and discourse. The current system is not yet at acceptable production quality, and some properties and vocabulary are still experimental. Please help UMBEL become better !
The SWRC (Semantic Web for Research Communities) is an ontology for modeling entities of research communities such as persons, organisations, publications (bibliographic metadata) and their relationships. It is used in numerous applications and projects including the AIFB portal, Bibster and the SemIPort project.
The Citation Typing Ontology is an ontology for the characterization of citations, both factually and rhetorically. It forms part of SPAR, a suite of Semantic Publishing and Referencing Ontologies.
OPMV, the Open Provenance Model Vocabulary, provides terms to enable practitioners of data publishing to publish their data responsibly. The Open Provenance Model Vocabulary is closely based on the community provenance data model, the Open Provenance Model (OPM).
* Development of methods, tools and applications for adaptive Knowledge Engineering in the context of the Semantic Web * Research of underlying Semantic Web technologies and development of fundamental Semantic Web tools and applications * Maturation of strategies for fruitfully combining the Social Web paradigms with semantic knowledge representation techniques