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.

Querying a super-peer in a schema-based super-peer network / Beneventano, Domenico; Bergamaschi, Sonia; Guerra, Francesco; Vincini, Maurizio. - STAMPA. - 4125:(2007), pp. 13-25. ((Intervento presentato al convegno Databases, Information Systems, and Peer-to-Peer Computing tenutosi a Trondheim, Norway nel August 28-29, 2005.

Querying a super-peer in a schema-based super-peer network

BENEVENTANO, Domenico;BERGAMASCHI, Sonia;GUERRA, Francesco;VINCINI, Maurizio
2007-01-01

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.
Databases, Information Systems, and Peer-to-Peer Computing
Trondheim, Norway
August 28-29, 2005
4125
13
25
Beneventano, Domenico; Bergamaschi, Sonia; Guerra, Francesco; Vincini, Maurizio
Querying a super-peer in a schema-based super-peer network / Beneventano, Domenico; Bergamaschi, Sonia; Guerra, Francesco; Vincini, Maurizio. - STAMPA. - 4125:(2007), pp. 13-25. ((Intervento presentato al convegno Databases, Information Systems, and Peer-to-Peer Computing tenutosi a Trondheim, Norway nel August 28-29, 2005.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/465279
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