Sciweavers

1846 search results - page 80 / 370
» Fuzzy queries and relational databases
Sort
View
WWW
2006
ACM
16 years 16 days ago
Upgrading relational legacy data to the semantic web
In this poster, we describe a framework composed of the R2O mapping language and the ODEMapster processor to upgrade relational legacy data to the Semantic Web. The framework is b...
Asunción Gómez-Pérez, Jes&uac...
PODS
2006
ACM
121views Database» more  PODS 2006»
16 years 8 hour ago
On the efficiency of checking perfect privacy
Privacy-preserving query-answering systems answer queries while provably guaranteeing that sensitive information is kept secret. One very attractive notion of privacy is perfect p...
Ashwin Machanavajjhala, Johannes Gehrke
ICDE
2007
IEEE
116views Database» more  ICDE 2007»
16 years 1 months ago
X-Time: Schema Versioning and Cross-Version Querying in Data Warehouses
In this demo we present X-Time, a prototype for managing schema versioning in relational data warehouses, specifically oriented to support the formulation of crossversion queries,...
Stefano Rizzi, Matteo Golfarelli
ACSW
2004
15 years 1 months ago
A fuzzy ontology for medical document retrieval
Ontologies represent a method of formally expressing a shared understanding of information, and have been seen by many authors as a prerequisite for the "Semantic web". ...
David Parry
ICDM
2007
IEEE
135views Data Mining» more  ICDM 2007»
15 years 6 months ago
Private Inference Control for Aggregate Database Queries
Data security is a critical issue for many organizations. Sensitive data must be protected from both inside and outside attackers. Access control policies and related mechanisms h...
Geetha Jagannathan, Rebecca N. Wright