Abstract
We propose a novel approach for defining and querying a super-peer within a schema-based super-peer network organized into a two-level architecture: the low level, called the peer level (which contains a mediator node), the second one, called super-peer level (which integrates mediators peers with similar content).
We focus on a single super-peer and propose a method to define and solve a query, fully implemented in the SEWASIE project prototype.
The problem we faced is relevant as a super-peer is a two-level data integrated system, then we are going beyond traditional setting in data integration. We have two different levels of Global as View mappings: the first mapping is at the super-peer level and maps several Global Virtual Views (GVVs) of peers into the GVV of the super-peer; the second mapping is within a peer and maps the data sources into the GVV of the peer. Moreover, we propose an approach where the integration designer, supported by a graphical interface, can implicitly define mappings by using Resolution Functions to solve data conflicts, and the Full Disjunction operator that has been recognized as providing a natural semantics for data merging queries.
This research has been partially funded by the UE-IST SEWASIE project and the italian MIUR PRIN WISDOM project.
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© 2007 Springer Berlin Heidelberg
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Beneventano, D., Bergamaschi, S., Guerra, F., Vincini, M. (2007). Querying a Super-Peer in a Schema-Based Super-Peer Network. In: Moro, G., Bergamaschi, S., Joseph, S., Morin, JH., Ouksel, A.M. (eds) Databases, Information Systems, and Peer-to-Peer Computing. DBISP2P DBISP2P 2006 2005. Lecture Notes in Computer Science, vol 4125. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-71661-7_2
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DOI: https://doi.org/10.1007/978-3-540-71661-7_2
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-71660-0
Online ISBN: 978-3-540-71661-7
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