141 search results - page 2 / 29 » Equivalence of queries combining set and bag-set semantics |
TACS
1994
Springer
13 years 9 months ago
1994
Springer
Abstract. We have designed a programming logic based on an integration of functional programming languages with classical set theory. The logic merges a classical view of equality ...
ICDT
2010
ACM
13 years 7 months ago
2010
ACM
When a query is evaluated under bag semantics, each answer is returned as many times as it has derivations. Bag semantics has long been recognized as important, especially when ag...
IDEAS
2005
IEEE
13 years 11 months ago
2005
IEEE
Traditional approaches to query processing aim at rewriting a given query into another more efficient one that uses less time and/or resources during the execution. There by, the...
ECSQARU
2001
Springer
13 years 10 months ago
2001
Springer
Abstract. In this paper, we first investigate set semantics of propositional logic in terms of rough sets and discuss how truth values of propositions (sentences) can be interpret...
ER
2006
Springer
13 years 9 months ago
2006
Springer
Ontologies on the Semantic Web are by nature decentralized. From the body of ontology mapping approaches, we can draw a conclusion that an effective approach to automate ontology m...