3652 search results - page 205 / 731 » A study of query length |
DAMON
2006
Springer
13 years 12 months ago
2006
Springer
Hashing is one of the fundamental techniques used to implement query processing operators such as grouping, aggregation and join. This paper studies the interaction between modern...
CNL
2009
13 years 9 months ago
2009
Abstract. As it is well-known, querying and managing structured data in natural language is a challenging task due to its ambiguity (syntactic and semantic) and its expressiveness....
SAC
2008
ACM
13 years 7 months ago
2008
ACM
We address aggregate queries over GIS data and moving object data, where non-spatial information is stored in a data warehouse. We propose a formal data model and query language t...
JSC
2010
13 years 6 months ago
2010
We study the problem of deciding whether two ontologies are inseparable w.r.t. a signature Σ, i.e., whether they have the same consequences in the signature Σ. A special case is...
SIGMOD
2011
ACM
12 years 11 months ago
2011
ACM
We study the problem of context-sensitive ranking for document retrieval, where a context is defined as a sub-collection of documents, and is specified by queries provided by do...