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IDEAS
2005
IEEE
101views Database» more  IDEAS 2005»
14 years 4 months ago
Rewriting-Based Optimization for XQuery Transformational Queries
The modern XML query language called XQuery includes advanced facilities both to query and to transform XML data. An XQuery query optimizer should be able to optimize any query. F...
Maxim Grinev, Peter Pleshachkov
APPROX
2006
Springer
105views Algorithms» more  APPROX 2006»
14 years 2 months ago
Space Complexity vs. Query Complexity
Abstract. Combinatorial property testing deals with the following relaxation of decision problems: Given a fixed property and an input x, one wants to decide whether x satisfies th...
Oded Lachish, Ilan Newman, Asaf Shapira
SIGMOD
2007
ACM
160views Database» more  SIGMOD 2007»
14 years 11 months ago
Cayuga: a high-performance event processing engine
We propose a demonstration of Cayuga, a complex event monitoring system for high speed data streams. Our demonstration will show Cayuga applied to monitoring Web feeds; the demo w...
Lars Brenna, Alan J. Demers, Johannes Gehrke, Ming...
WWW
2008
ACM
14 years 12 months ago
Scalable querying services over fuzzy ontologies
Fuzzy ontologies are envisioned to be useful in the Semantic Web. Existing fuzzy ontology reasoners are not scalable enough to handle the scale of data that the Web provides. In t...
Jeff Z. Pan, Giorgos B. Stamou, Giorgos Stoilos, S...
PODS
2008
ACM
250views Database» more  PODS 2008»
14 years 11 months ago
Approximating predicates and expressive queries on probabilistic databases
We study complexity and approximation of queries in an expressive query language for probabilistic databases. The language studied supports the compositional use of confidence com...
Christoph Koch