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Schema mediation and query processing in Peer Data Management Systems Zhao, Jie
Abstract
P2P Data Management Systems (PDMSs) allow the efficient sharing of data between peers with overlapping sources of information. These sources share data through semantic mappings between peers. In current systems, queries are asked over each peer’s local schema and then translated using the semantic mappings between peers. In this thesis we propose that a mediated schema can benefit PDMSs by allowing access to more data and by making that access comprehensible. We present our system - MePSys, which uses the mediated schema as a media for query translation in relational PDMSs. We show how to create a mediated schema in PDMSs automatically using the semantics of the existing mappings provided to translate queries. We further discuss how to update the mediated schema in a stable state, i.e., after the system setup period.
Item Metadata
Title |
Schema mediation and query processing in Peer Data Management Systems
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2006
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Description |
P2P Data Management Systems (PDMSs) allow the efficient sharing of data between peers with overlapping sources of information. These sources share data through semantic mappings between peers. In current systems, queries are asked over each peer’s local schema and then translated using the semantic mappings between peers. In this thesis we propose that a mediated schema can benefit PDMSs by allowing access to more data and by making that access comprehensible. We present our system - MePSys, which uses the mediated schema as a media for query translation in relational PDMSs. We show how to create a mediated schema in PDMSs automatically using the semantics of the existing mappings provided to translate queries. We further discuss how to update the mediated schema in a stable state, i.e., after the system setup period.
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Genre | |
Type | |
Language |
eng
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Date Available |
2010-01-16
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0051733
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2006-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.