Who is implementing OWL tools and applications?
A. A large number of organizations have been exploring the use of OWL, with many tools currently available. The Working Group is maintaining a list of implementations and demonstrations. In addition, both the US government (via DARPA and NSF) and the European Union (via the 5th and 6th generation frameworks of the IST program) have invested in web ontology language development. Most of the systems currently using DAML, OIL and DAML+OIL (the predecessor languages that OWL was based on) are now migrating to OWL. In addition, a number of ontology language tools, such as the widely used Protege system, now provide OWL support.