2859 search results - page 65 / 572 » Querying Complex Structured Databases |
ESWS
2008
Springer
13 years 9 months ago
2008
Springer
Accessing structured data such as that encoded in ontologies and knowledge bases can be done using either syntactically complex formal query languages like SPARQL or complicated fo...
CINQ
2004
Springer
13 years 11 months ago
2004
Springer
The conflict between resource consumption and query performance in the data mining context often has no satisfactory solution. This not only stands in sharp contrast to the need of...
WWW
2009
ACM
14 years 8 months ago
2009
ACM
Web search engines often federate many user queries to relevant structured databases. For example, a product related query might be federated to a product database containing thei...
CIKM
1998
Springer
14 years 8 days ago
1998
Springer
In this paper, a signature file method for indexing document database systems is presented. For this purpose, the concept of presentative word hierarchy is introduced, based on whi...
XSYM
2004
Springer
14 years 1 months ago
2004
Springer
A key step in the optimization of declarative queries over XML data is estimating the selectivity of path expressions, i.e., the number of elements reached by a specific navigatio...