Extending the study of social dynamics caused by such friend-of-a-friend tensions to social networks beyond triangles, Dorwin Cartwright and Frank Harary used signed graphs to indicate positive or negative sentiments between persons.
[4] Bo Anderson made an analysis of the friend-of-a-friend relationship in connection with his criticism of balance theory.
But the fact that friendship is not automatically a transitive relation produces some social dynamics.
[7] The acronym FOAF was coined by Rodney Dale and used in his 1978 book The Tumour in the Whale: A Collection of Modern Myths.
[8] In information science, an ontology describes categories, properties and relations between concepts, data and entities.