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SDB
1995
178views Database» more  SDB 1995»
14 years 2 months ago
A Semantics-based Approach to Design of Query Languages for Partial Information
Most of work on partial information in databases asks which operations of standard languages, like relational algebra, can still be performed correctly in the presence of nulls. In...
Leonid Libkin
CIKM
1994
Springer
14 years 3 months ago
Semantics-Based Information Brokering
The rapid advances in computer and communication technologies, and their merger, is leading to a global information market place. It will consist of federations of very large numb...
Vipul Kashyap, Amit P. Sheth
EKAW
2008
Springer
14 years 21 days ago
A Visual Approach to Semantic Query Design Using a Web-Based Graphical Query Designer
Query formulation is a key aspect of information retrieval, contributing to both the efficiency and usability of many semantic applications. A number of query languages, such as SP...
Paul R. Smart, Alistair Russell, Dave Braines, Yan...
CIKM
2008
Springer
14 years 28 days ago
A heuristic approach for checking containment of generalized tree-pattern queries
Query processing techniques for XML data have focused mainly on tree-pattern queries (TPQs). However, the need for querying XML data sources whose structure is very complex or not...
Pawel Placek, Dimitri Theodoratos, Stefanos Soulda...
PODS
2009
ACM
113views Database» more  PODS 2009»
14 years 11 months ago
Relative information completeness
The paper investigates the question of whether a partially closed database has complete information to answer a query. In practice an enterprise often maintains master data Dm, a ...
Wenfei Fan, Floris Geerts