1418 search results - page 15 / 284 » Schema polynomials and applications |
ICDT
2010
ACM
14 years 4 months ago
2010
ACM
It is known that the composition of schema mappings, each specified by source-to-target tgds (st-tgds), can be specified by a secondorder tgd (SO tgd). We consider the question of...
DOOD
1995
Springer
13 years 11 months ago
1995
Springer
Abstract. A simple model for method-based authorization is defined and an algorithm is presented for testing in compile-time whether a given database schema violates authorization...
CLUSTER
2004
IEEE
13 years 11 months ago
2004
IEEE
A key challenge in supporting data-driven scientific applications is the storage and management of input and output data in a distributed environment. In this paper, we describe a...
SIAMDM
2010
13 years 2 months ago
2010
Inspired by the convex program of Eisenberg and Gale which captures Fisher markets with linear utilities, Jain and Vazirani [STOC, 2007] introduced the class of EisenbergGale (EG)...
WISE
2005
Springer
14 years 28 days ago
2005
Springer
Many databases have become Web-accessible through form-based search interfaces (i.e., search forms) that allow users to specify complex and precise queries to access the underlying...