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COOPIS
2003
IEEE
14 years 2 months ago
Query Evaluation in Peer-to-Peer Networks of Taxonomy-Based Sources
We consider the problem of query evaluation in Peer-to-Peer (P2P) systems that support semantic-based retrieval services. We confine ourselves to the case where the peers employ t...
Yannis Tzitzikas, Carlo Meghini
ICDT
2003
ACM
139views Database» more  ICDT 2003»
14 years 2 months ago
New Rewritings and Optimizations for Regular Path Queries
All the languages for querying semistructured data and the web use as an integral part regular expressions. Based on practical observations, finding the paths that satisfy those r...
Gösta Grahne, Alex Thomo
KR
2010
Springer
14 years 1 months ago
Query and Predicate Emptiness in Description Logics
Ontologies can be used to provide an enriched vocabulary for the formulation of queries over instance data. We identify query emptiness and predicate emptiness as two central reas...
Franz Baader, Meghyn Bienvenu, Carsten Lutz, Frank...
SSD
2001
Springer
111views Database» more  SSD 2001»
14 years 1 months ago
Querying Mobile Objects in Spatio-Temporal Databases
In dynamic spatio-temporal environments where objects may continuously move in space, maintaining consistent information about the location of objects and processing motion-speci...
Kriengkrai Porkaew, Iosif Lazaridis, Sharad Mehrot...
KBSE
2000
IEEE
14 years 1 months ago
Practical Large Scale What-If Queries: Case Studies with Software Risk Assessment
When a lack of data inhibits decision making, large scale what-if queries can be conducted over the uncertain parameter ranges. Such what-if queries can generate an overwhelming a...
Tim Menzies, Erik Sinsel