Sciweavers

1268 search results - page 44 / 254
» On database query languages for K-relations
Sort
View
CORR
2011
Springer
209views Education» more  CORR 2011»
13 years 2 months ago
An Empirical Study of Real-World SPARQL Queries
Understanding how users tailor their SPARQL queries is crucial when designing query evaluation engines or fine-tuning RDF stores with performance in mind. In this paper we analyz...
Mario Arias, Javier D. Fernández, Miguel A....
ICDCS
1996
IEEE
13 years 12 months ago
Scaling Heterogeneous Databases and the Design of Disco
Access to large numbers of data sources introduces new problems for users of heterogeneous distributed databases. End users and application programmers must deal with unavailable ...
Anthony Tomasic, Louiqa Raschid, Patrick Valduriez
VISUAL
1999
Springer
13 years 12 months ago
Querying Multimedia Data Sources and Databases
To support the retrieval and fusion of multimedia information from multiple sources and databases, a spatial/temporal query language called ΣQL is proposed. ΣQL is based upon th...
Shi-Kuo Chang, Gennaro Costagliola, Erland Jungert
FQAS
2009
Springer
127views Database» more  FQAS 2009»
14 years 2 months ago
Finding Top-k Approximate Answers to Path Queries
We consider the problem of finding and ranking paths in semistructured data without necessarily knowing its full structure. The query language we adopt comprises conjunctions of r...
Carlos A. Hurtado, Alexandra Poulovassilis, Peter ...
CIKM
2010
Springer
13 years 5 months ago
Index structures for efficiently searching natural language text
Many existing indexes on text work at the document granularity and are not effective in answering the class of queries where the desired answer is only a term or a phrase. In this...
Pirooz Chubak, Davood Rafiei