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DOLAP
2009
ACM
14 years 2 months ago
LMDQL: link-based and multidimensional query language
The current commercial and academic OLAP tools do not process XML data that make use of XLink. To develop OLAP systems for helping in the analysis of such data, this paper propose...
Paulo Caetano da Silva, Fábio Santos Souza,...
GLOBE
2009
Springer
14 years 7 days ago
Designing, Specifying and Querying Metadata for Virtual Data Integration Systems
Abstract. We show how to specify and use the metadata for a virtual and relational data integration system under the local-as-view (LAV) approach. We use XML and RuleML for represe...
Leopoldo E. Bertossi, Gayathri Jayaraman
SIGIR
2006
ACM
14 years 1 months ago
Why structural hints in queries do not help XML-retrieval
For many years it has been commonly held that a user who adds structural “hints” to a query will improve precision in an element retrieval search. At INEX 2005 we conducted an...
Andrew Trotman, Mounia Lalmas
SIGMOD
2003
ACM
127views Database» more  SIGMOD 2003»
14 years 7 months ago
Cache-and-Query for Wide Area Sensor Databases
Webcams, microphones, pressure gauges and other sensors provide exciting new opportunities for querying and monitoring the physical world. In this paper we focus on querying wide ...
Amol Deshpande, Suman Kumar Nath, Phillip B. Gibbo...
VLDB
2004
ACM
180views Database» more  VLDB 2004»
14 years 1 months ago
Bloom Histogram: Path Selectivity Estimation for XML Data with Updates
Cost-based XML query optimization calls for accurate estimation of the selectivity of path expressions. Some other interactive and internet applications can also benefit from suc...
Wei Wang 0011, Haifeng Jiang, Hongjun Lu, Jeffrey ...