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» Querying Complex Structured Databases
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ICMCS
2005
IEEE
120views Multimedia» more  ICMCS 2005»
15 years 8 months ago
KPYR: An Efficient Indexing Method
Motivated by the needs for efficient indexing structures adapted to real applications in video database, we present a new indexing structure named Kpyr. In Kpyr, we use a clusteri...
Thierry Urruty, Fatima Belkouch, Chabane Djeraba
ICDT
2010
ACM
180views Database» more  ICDT 2010»
15 years 11 months ago
Foundations of SPARQL Query Optimization
We study fundamental aspects related to the efficient processing of the SPARQL query language for RDF, proposed by the W3C to encode machine-readable information in the Semantic W...
Michael Schmidt, Michael Meier, Georg Lausen
133
Voted
WISE
2002
Springer
15 years 7 months ago
Towards Declarative XML Querying
How to extract data from XML documents is an important issue for XML research and development. However, how to view XML documents determines how they can be queried. In this paper...
Mengchi Liu, Tok Wang Ling
SIGMOD
2007
ACM
91views Database» more  SIGMOD 2007»
16 years 2 months ago
Indexing dataspaces
Dataspaces are collections of heterogeneous and partially unstructured data. Unlike data-integration systems that also offer uniform access to heterogeneous data sources, dataspac...
Xin Dong, Alon Y. Halevy
ICDE
2008
IEEE
166views Database» more  ICDE 2008»
16 years 3 months ago
A Clustered Index Approach to Distributed XPath Processing
Supporting top-k queries over distributed collections of schemaless XML data poses two challenges. While XML supports expressive query languages such as XPath and XQuery, these la...
Georgia Koloniari, Evaggelia Pitoura