7576 search results - page 111 / 1516 » On Querying Ontologies and Databases |
WWW
2003
ACM
14 years 10 months ago
2003
ACM
The Semantic Web envisions a World Wide Web in which data is described with rich semantics and applications can pose complex queries. To this point, researchers have defined new l...
ADBIS
2005
Springer
14 years 3 months ago
2005
Springer
Abstract. The need for a user-friendly query language becomes increas
BMCBI
2005
13 years 9 months ago
2005
Background: We present a biological data warehouse called Atlas that locally stores and integrates biological sequences, molecular interactions, homology information, functional a...
CAISE
2006
Springer
14 years 1 months ago
2006
Springer
Databases are continuously evolving environments, where design constructs are added, removed or updated quite often. Research has extensively dealt with the problem of database evo...
ICDT
2007
ACM
14 years 3 months ago
2007
ACM
Abstract. We study containment of conjunctive queries that are evaluated over databases that may contain tuples with null values. We assume the semantics of SQL for single block qu...