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cs.DB2019★ 6 cited
On the Expressiveness of LARA: A Unified Language for Linear and Relational Algebra
Pablo Barceló, Nelson Higuera, Jorge Pérez +1
We study the expressive power of the LARA language -- a recently proposed unified model for expressing relational and linear algebra operations -- both in terms of traditional data…
cs.DB2006★ 32 cited
Semantics and Complexity of SPARQL
Jorge Perez, Marcelo Arenas, Claudio Gutierrez
SPARQL is the W3C candidate recommendation query language for RDF. In this paper we address systematically the formal study of SPARQL, concentrating in its graph pattern facility.…