Hello All,
  As Nina suggested we should seek for some existing ontology describing
personal information like FOAF (Friend of a Friend) ; see
http://xmlns.com/foaf/spec/ . However I'm not sure if FOAF-core is what
we are looking for since it doesn't contain some necessary information
like the Person's address, so I think we could use the AddressVocab
extension of FOAF; see http://wiki.foaf-project.org/w/AddressVocab .
There is also a WS for storing FOAF-formated RDF data at
http://www.ldodds.com/foaf/foaf-a-matic .

Best Regards,
Pantelis