The Seventh Agricultural Ontology Services Workshop (AOS) on the "Ontology-based knowledge discovery: Using metadata and ontologies for improving access to agricultural information" was organized by Food and Agriculture Organization (FAO) in collaboration with the Fifth International Conference of the Asian Federation for Information Technology in Agriculture, from 10 to 11 November, 2006 at the Indian Institute of Sciences (Bangalore), India. The presentations and workshop report are now available online.