19 search results - page 3 / 4 » On Preservation under Homomorphisms and Unions of Conjunctiv... |
RR
2009
Springer
13 years 12 months ago
2009
Springer
Abstract. It is well-knwon that crisp RDF is not suitable to represent vague information. Fuzzy RDF variants are emerging to overcome to this limitations. In this work we provide, ...
ICDT
2007
ACM
13 years 11 months ago
2007
ACM
Abstract. We deļ¬ne and study formal privacy guarantees for information integration systems, where sources are related to a public schema by mappings given by source-to-target dep...
IJFCS
2010
13 years 3 months ago
2010
The fundamental properties of the class QUASI of quasi-relabeling relations are investigated. A quasi-relabeling relation is a tree relation that is de ned by a tree bimorphism (Ļ...
ICDT
2005
ACM
13 years 11 months ago
2005
ACM
We formulate and study a privacy guarantee to data owners, who share information with clients by publishing views of a proprietary database. The owner identiļ¬es the sensitive pro...
ADBIS
2004
Springer
13 years 10 months ago
2004
Springer
Repairing a database means making the database consistent by applying changes that are as small as possible. Nearly all approaches to repairing have assumed deletions and insertion...