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SIGMOD
2002
ACM
198views Database» more  SIGMOD 2002»
14 years 6 months ago
Processing complex aggregate queries over data streams
Recent years have witnessed an increasing interest in designing algorithms for querying and analyzing streaming data (i.e., data that is seen only once in a fixed order) with only...
Alin Dobra, Minos N. Garofalakis, Johannes Gehrke,...
AAAI
2006
13 years 8 months ago
An Investigation into the Feasibility of the Semantic Web
This report is an expanded version of a paper in AAAI-2006 proceedings. In this report, we investigate the challenges that must be addressed for the Semantic Web to become a feasi...
Zhengxiang Pan, Abir Qasem, Jeff Heflin
IS
2008
13 years 6 months ago
The complexity and approximation of fixing numerical attributes in databases under integrity constraints
Consistent query answering is the problem of characterizing and computing the semantically correct answers to queries from a database that may not satisfy certain integrity constr...
Leopoldo E. Bertossi, Loreto Bravo, Enrico Francon...
SMC
2010
IEEE
124views Control Systems» more  SMC 2010»
13 years 5 months ago
SoftFacts: A top-k retrieval engine for ontology mediated access to relational databases
—We outline SoftFacts, an ontology mediated top-k information retrieval system over relational databases. An ontology layer is used to define (in terms of a OWL-QL like Semantic...
Umberto Straccia
ICDE
2006
IEEE
144views Database» more  ICDE 2006»
14 years 8 months ago
Approximately Processing Multi-granularity Aggregate Queries over Data Streams
Aggregate monitoring over data streams is attracting more and more attention in research community due to its broad potential applications. Existing methods suffer two problems, 1...
Shouke Qin, Weining Qian, Aoying Zhou