A data model models a social network. The data model can be embodied as a person profile schema and a connector profile schema. The person profile schema defines properties of persons in the social network. The connector profile schema defines connectivity properties of persons that connect a searcher to the persons in social network that the searcher desires to find. Query languages can be based on the data model and can be used to express queries of social networks. Queries can be for persons, for connecting persons, or for both.