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ISPAN
2009
IEEE
15 years 4 months ago
SoCQ: A Framework for Pervasive Environments
Abstract—Querying non-conventional data sources is recognized as a major issue in new environments and applications such as those occurring in pervasive computing. A key issue is...
Yann Gripay, Frédérique Laforest, Je...
VLDB
2005
ACM
103views Database» more  VLDB 2005»
15 years 3 months ago
Semantic Query Optimization for XQuery over XML Streams
We study XML stream-specific schema-based optimization. We assume a widely-adopted automata-based execution model for XQuery evaluation. Criteria are established regarding what s...
Hong Su, Elke A. Rundensteiner, Murali Mani
PODS
2006
ACM
122views Database» more  PODS 2006»
15 years 10 months ago
Space- and time-efficient deterministic algorithms for biased quantiles over data streams
Skew is prevalent in data streams, and should be taken into account by algorithms that analyze the data. The problem of finding "biased quantiles"-- that is, approximate...
Graham Cormode, Flip Korn, S. Muthukrishnan, Dives...
DC
2008
14 years 10 months ago
Sketching asynchronous data streams over sliding windows
We study the problem of maintaining a sketch of recent elements of a data stream. Motivated by applications involving network data, we consider streams that are asynchronous, in wh...
Bojian Xu, Srikanta Tirthapura, Costas Busch
INEX
2004
Springer
15 years 3 months ago
If INEX Is the Answer, What Is the Question?
The INEX query languages allow the extraction of fragments from selected documents. This power is not much used in INEX queries. The paper suggests reasons why, and considers which...
Richard A. O'Keefe