@prefix  foaf:  <http://xmlns.com/foaf/0.1/> .
@prefix  rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix  bio:  <http://purl.org/vocab/bio/0.1/> .
@prefix  xsd:  <http://www.w3.org/2001/XMLSchema#> .

<> rdf:type foaf:PersonalProfileDocument .

_:d  a foaf:Person ;
     foaf:mbox  <mailto:dan@work.example.com> ;
     foaf:name  "Daniel" ;
     foaf:nick  "Dan" ;
     foaf:nick  "Danny" ;
     rdf:type    foaf:Person ;
     bio:event  [ a bio:Birth; bio:date "1976-04-15"^^xsd:date ] .

_:d  foaf:knows    _:c .
_:c  foaf:mbox  <mailto:celine@work.example.com> .

<celineFoaf.rdf> rdf:type foaf:PersonalProfileDocument .

_:d  foaf:knows    _:f .

_:f  a foaf:Person ;
     foaf:name "Fred" ;
     foaf:mbox  <mailto:fred@work.example.com> ;
     bio:event  [ a bio:Birth; bio:date "1978-06-30"^^xsd:date ] .