The Tetherless World Wine Agent is powered by three ontologies. The food and wine ontologies are adapted from those released as part of the W3C's OWL 1.0 Guide[1]. Many classes have been updated and the food ontology has been fleshed out to provide a greater expressivity for end users. There is also an agent ontology which encapsulates all of the commands that can be sent to the Wine Agent server. To learn more about how to access data using these ontologies, visit the Data Access page. Coming soon there will be a web-based method of browsing the ontology.