894 search results - page 144 / 179 » Gram: A Graph Data Model and Query Language |
CCS
2007
ACM
14 years 3 months ago
2007
ACM
In this paper, we study the maintenance of role-based access control (RBAC) models in database environments using transitive closure relations. In particular, the algorithms that ...
ECOOP
1999
Springer
14 years 1 months ago
1999
Springer
Several advanced applications, such as those dealing with the Web, need to handle data whose structure is not known a-priori. Such requirement severely limits the applicability of ...
WWW
2009
ACM
14 years 9 months ago
2009
ACM
We demonstrate a flight meta-search engine that is based on the Metamorph framework. Metamorph provides mechanisms to model web forms together with the interactions which are need...
ICDT
2010
ACM
14 years 2 months ago
2010
ACM
We examine schema mappings from a type-theoretic perspective and aim to facilitate and formalize the reuse of mappings. Starting with the mapping language of Clio, we present a ty...
CVPR
2007
IEEE
14 years 11 months ago
2007
IEEE
We propose a novel unsupervised learning framework for activity perception. To understand activities in complicated scenes from visual data, we propose a hierarchical Bayesian mod...