Publication

Self-Organizing Schema Mappings in the GridVine Peer Data Management System

Karl Aberer, Philippe Cudré-Mauroux, Parisa Haghani, Adriana Budura
2007
Conference Papers

Abstract

GridVine is a Peer Data Management System based on a decentralized access structure. Built following the principle of data independence, it separates a logical layer -- where data, schemas and mappings are managed -- from a physical layer consisting of a structured Peer-to-Peer network supporting efficient routing of messages and index load-balancing. Our system is totally decentralized, yet it fosters semantic interoperability through pairwise schema mappings and query reformulation. In this demonstration, we present a set of algorithms to automatically organize the network of schema mappings. We concentrate on three key functionalities: (1) the sharing of data, schemas and schema mappings in the network, (2) the dynamic creation and deprecation of mappings to foster global interoperability, and (3) the propagation of queries using the mappings. We illustrate these functionalities using bioinformatic schemas and data in a network running on several hundreds of peers simultaneously.

Official source

https://infoscience.epfl.ch/entities/publication/76a89526-07ab-4f25-8bd4-b454bd2eadd3

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Karl Aberer, Philippe Cudré-Mauroux, Parisa Haghani, Adriana Budura
2007
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/76a89526-07ab-4f25-8bd4-b454bd2eadd3

About this result

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Physical layer

In the seven-layer OSI model of computer networking, the physical layer or layer 1 is the first and lowest layer: the layer most closely associated with the physical connection between devices. The physical layer provides an electrical, mechanical, and procedural interface to the transmission medium. The shapes and properties of the electrical connectors, the frequencies to broadcast on, the line code to use and similar low-level parameters, are specified by the physical layer.

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The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers data between nodes on a network segment across the physical layer. The data link layer provides the functional and procedural means to transfer data between network entities and may also provide the means to detect and possibly correct errors that can occur in the physical layer. The data link layer is concerned with local delivery of frames between nodes on the same level of the network.

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