OIL(Ontology Inference Layer or Ontology Interchange Language) can be regarded as an Ontology Infrastructure for the Semantic Web (see paper "OIL: An Ontology Infrastructure for the Semantic Web", IEEE INTELLIGENT SYSTEMS, MARCH/APRIL 2001).
From an theoretic view, OIL is one the the latest Description Logic (DL).
... Lhasa, Tibet in 1924
Cavalier de la Salle[?], explorer
Hernando de Soto, (died 1542), explorer
Bartolomeu Dias, (1450-1500), Portuguese explorer who first rounded ...