, PaulErdoes) . creator(X,Y) Returns the persons and the papers that were written with Paul Erdoes
, Article) . journal(X,Journal1-1940) . creator(X,Y) Returns the creators of all the elements that are articles and were, Journal, vol.1, 1940.
, Article) . creator(X,PaulErdoes) Returns all the articles created by Paul Erdoes
Pushing the el envelope, Proc. of IJCAI 2005, 2005. ,
Tractable reasoning and efficient query answering in description logics: The dl-lite family, J. Autom. Reasoning, vol.39, issue.3, pp.385-429, 2007. ,
, Europeana RDF store report, 2011.
Data integration: A theoretical perspective, Proc. of PODS 2002, 2002. ,
Sp2bench: A sparql performance benchmark, 2008. ,