654 search results - page 95 / 131 » Complexity of Answering Queries Using Materialized Views |
PODS
2008
ACM
15 years 12 months ago
2008
ACM
In the study of data exchange one usually assumes an openworld semantics, making it possible to extend instances of target schemas. An alternative closed-world semantics only move...
SEMWEB
2010
Springer
14 years 9 months ago
2010
Springer
Abstract. Policies are declarations of constraints on the behaviour of components within distributed systems, and are often used to capture norms within agent-based systems. A few ...
AAAI
1997
15 years 1 months ago
1997
This paper describes an environment for supporting very large ontologies. The system can be used on single PCs, workstations, a cluster of workstations, and high-end parallel supe...
ADHOC
2005
14 years 11 months ago
2005
While sensor networks are going to be deployed in diverse application specific contexts, one unifying view is to treat them essentially as distributed databases. The simplest mech...
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CCR
2004
14 years 11 months ago
2004
There has been much interest in both unstructured and structured overlays recently. Unstructured overlays, like Gnutella, build a random graph and use flooding or random walks on ...