251 search results - page 11 / 51 » Rewriting Aggregate Queries using Description Logic |
DLOG
2008
13 years 10 months ago
2008
Answering conjunctive queries (CQs) has been recognized as a key task for the usage of Description Logics (DLs) in a number of applications. The problem has been studied by many au...
COOPIS
2002
IEEE
14 years 22 days ago
2002
IEEE
In this paper we propose a mediator architecture for the querying and integration of Web-accessible XML data sources. Our contributions are (i) the definition of a simple but expr...
SIGMOD
2001
ACM
14 years 8 months ago
2001
ACM
Materialized views can provide massive improvements in query processing time, especially for aggregation queries over large tables. To realize this potential, the query optimizer ...
DMSN
2009
ACM
14 years 2 months ago
2009
ACM
Networked, distributed real world sensing is an increasingly prominent topic in computing and has quickly expanded from resource constrained “sensor networks” measuring simple...
DLOG
2003
13 years 9 months ago
2003
An object-oriented software design is often modelled as a collection of UML diagrams. There is an inherent need to preserve the consistency between these diagrams. Moreover, throu...