383 search results - page 32 / 77 » Query Containment for Conjunctive Queries with Regular Expre... |
SEMWEB
2010
Springer
13 years 6 months ago
2010
Springer
Abstract. In order to effectively and quickly answer queries in environments with distributed RDF/OWL, we present a query optimization algorithm to identify the potentially relevan...
WIDM
2003
ACM
14 years 1 months ago
2003
ACM
Query rewriting using views is an essential issue in data integration. A number of algorithms, e.g., the bucket algorithm, the inverse rules algorithm, the SVB algorithm and the M...
DASFAA
2007
IEEE
14 years 3 months ago
2007
IEEE
Nearest-neighbor queries are an important query type for commonly used feature databases. In many different application areas, e.g. sensor databases, location based services or fac...
ICDE
2002
IEEE
14 years 10 months ago
2002
IEEE
XML and other semi-structured data may have partially specified or missing schema information, motivating the use of a structural summary which can be automatically computed from ...
RIAO
2007
13 years 10 months ago
2007
The paper proposes an approach to information retrieval based on the use of a structure (ontology) both for document (resp. query) indexing and query evaluating. The conceptual st...