2228 search results - page 333 / 446 » A System for Semantic Query Optimization |
XIMEP
2006
ACM
14 years 2 months ago
2006
ACM
XQuery is a declarative language for querying and updating XML data sources. Interfacing XQuery to a host programming language is difficult because of the type system mismatch, an...
KIVS
2005
Springer
14 years 1 months ago
2005
Springer
: In modern information systems the dominant retrieval paradigms have shifted from exact matching towards retrieving a list of the most relevant objects. This is because users usua...
ICDT
1997
ACM
14 years 11 days ago
1997
ACM
We develop a new schema for unstructured data. Traditional schemas resemble the type systems of programming languages. For unstructured data, however, the underlying type may be mu...
DKE
2007
13 years 8 months ago
2007
Histogram techniques have been used in many commercial database management systems to estimate a query result size. Recently, it has been shown that they are very effective to su...
IAT
2010
IEEE
13 years 6 months ago
2010
IEEE
This paper describes the design and implementation of backward chained clustered RDFS reasoning in 4store. The system presented, called "4s-reasoner", adds no overhead t...