ICDE
2012
IEEE
12 years 2 months ago
2012
IEEE
Abstract—This paper revisits the classical problem of multiquery optimization in the context of RDF/SPARQL. We show that the techniques developed for relational and semi-structur...
PVLDB
2010
13 years 7 months ago
2010
Experience with relational systems has shown that distribution is an effective way of improving the scalability of query evaluation. In this paper, we show how distributed query e...
WECWIS
2003
IEEE
14 years 5 months ago
2003
IEEE
Service portals are systems which expose a bundle of web services to the user, allowing the specification and subsequent execution of complex tasks defined over these individual...
DMSN
2009
ACM
14 years 7 months ago
2009
ACM
Generating a good execution plan for a declarative query has long been a central problem in data management research. With the rise in interest in wireless sensor networks (WSNs) ...
ICDE
2009
IEEE
14 years 7 months ago
2009
IEEE
— Information extraction (IE) systems are trained to extract specific relations from text databases. Real-world applications often require that the output of multiple IE systems...
SOSP
2009
ACM
14 years 9 months ago
2009
ACM
Data-intensive applications are increasingly designed to execute on large computing clusters. Grouped aggregation is a core primitive of many distributed programming models, and i...
SIGMOD
2006
ACM
15 years 17 days ago
2006
ACM
Text is ubiquitous and, not surprisingly, many important applications rely on textual data for a variety of tasks. As a notable example, information extraction applications derive...