1008 search results - page 114 / 202 » Logic and Databases |
SIGMOD
2010
ACM
14 years 22 days ago
2010
ACM
We investigate the problem of creating and analyzing samples of relational databases to find relationships between string-valued attributes. Our focus is on identifying attribute...
WWW
2006
ACM
14 years 8 months ago
2006
ACM
Path expressions are the principal means of locating data in a hierarchical model. But path expressions are brittle because they often depend on the structure of data and break if...
SAC
2006
ACM
14 years 1 months ago
2006
ACM
In the paper we describe the problem of grouping and aggregation in the concept-oriented data model. The model is based on ordering its elements within a hierarchical multidimensi...
DOLAP
2005
ACM
13 years 9 months ago
2005
ACM
Data warehouses and OLAP systems help to interactively analyze huge volume of data. This data, extracted from transactional databases, frequently contains spatial information whic...
GIS
2008
ACM
14 years 9 months ago
2008
ACM
In this paper, we follow the role-based access control (RBAC) approach and extend it to provide for the dynamic association of roles with users. In our framework, privileges assoc...