[ontology] FOAF (an acronym of Friend of a friend) is a machine-readable ontology describing persons, their activities and their relations to other people and objects. Anyone can use FOAF to describe him- or herself. FOAF allows groups of people to describe social networks without the need for a centralised database. FOAF is a descriptive v... Found on http://en.wikipedia.org/wiki/FOAF_(ontology)