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GLOBE
2008
Springer

Query Propagation in a P2P Data Integration System in the Presence of Schema Constraints

13 years 3 months ago
Query Propagation in a P2P Data Integration System in the Presence of Schema Constraints
This paper addresses the problem of data integration in a P2P environment, where each peer stores schema of its local data, mappings between the schemas, and some schema constraints. The goal of the integration is to answer queries formulated against a chosen peer. The answer consists of data stored in the queried peer as well as data of its direct and indirect partners. We focus on defining and using mappings, schema constraints, query propagation across the P2P system, and query reformulation in such scenario. The main focus is the exploitation of constraints for merging results from different peers to derive more complex information, and utilizing constraint knowledge to query propagation and the merging strategy. We show how the discussed method has been implemented in SixP2P system.
Tadeusz Pankowski
Added 09 Nov 2010
Updated 09 Nov 2010
Type Conference
Year 2008
Where GLOBE
Authors Tadeusz Pankowski
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