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AMW
2011
14 years 10 months ago
A Direct Translation from XPath to Nondeterministic Automata
Since navigational aspects of XPath correspond to first-order definability, it has been proposed to use the analogy with the very successful technique of translating LTL into aut...
Nadime Francis, Claire David, Leonid Libkin
SIGMOD
2009
ACM
134views Database» more  SIGMOD 2009»
16 years 6 months ago
Keyword query cleaning using hidden Markov models
In this paper, we consider the problem of keyword query cleaning for structured databases from a probabilistic approach. Keyword query cleaning consists of rewriting the user quer...
Ken Q. Pu
MIDDLEWARE
2009
Springer
16 years 1 months ago
PAQ: Persistent Adaptive Query Middleware for Dynamic Environments
Abstract. Pervasive computing applications often entail continuous monitoring tasks, issuing persistent queries that return continuously updated views of the operational environmen...
Vasanth Rajamani, Christine Julien, Jamie Payton, ...
ICDM
2005
IEEE
217views Data Mining» more  ICDM 2005»
16 years 2 days ago
Improving Automatic Query Classification via Semi-Supervised Learning
Accurate topical classification of user queries allows for increased effectiveness and efficiency in general-purpose web search systems. Such classification becomes critical if th...
Steven M. Beitzel, Eric C. Jensen, Ophir Frieder, ...
WWW
2001
ACM
16 years 7 months ago
A unified constraint model for XML
Integrity constraints are an essential part of a modern schema definition language. They are useful for semantic specification, update consistency control, query optimization, inf...
Gabriel M. Kuper, Jérôme Siméo...