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New methods for accessing data in RDF graph structures

Dominik Tomaszuk

Abstract

The dissertation presents a novel approach to accessing data in RDF structures. In the Semantic Web no trust and access control mechanisms exist. The purpose of the thesis is to solve the problems of storing, representing and accessing knowledge stored in the RDF form, expanded with new possibilities of expressing trust. The thesis introduces the RDF graph store, and proposes semistructural documents together with serialization, trust metrics, methods of subgraph selection and a possibility of handling agent identity. Furthermore, the model of a system, which utilizes the proposed algorithms and methods is proposed. Finally, the work describes the implementation and evaluation of a prototype system, which combines all of the introduced mechanisms. Performance is evaluated using benchmark data [23]. In comparison with other state-of-the-art RDF graph stores, the proposed methods and algorithms provide superior or comparable performance results, in spite of the fact that they are designed to work with trust and security measures.
Record ID
WUT262927
Diploma type
Doctor of Philosophy
Author
Dominik Tomaszuk Dominik Tomaszuk,, Undefined Affiliation
Title in Polish
Nowe metody dostępu do danych w strukturach grafowych RDF
Title in English
New methods for accessing data in RDF graph structures
Language
(en) English
Certifying Unit
Faculty of Electronics and Information Technology (FEIT)
Discipline
information science / (technology domain) / (technological sciences)
Status
Finished
Start date
24-01-2012
Defense Date
13-02-2014
Title date
25-02-2014
Supervisor
Internal reviewers
External reviewers
Krzysztof Goczyła Krzysztof Goczyła,, Undefined Affiliation
Pages
127
Keywords in English
Semantic Web, Linked Data, Resource Description Framework, Authentication, Authorization, Trust metric, Graph store, Data space, Data integration.
Abstract in English
The dissertation presents a novel approach to accessing data in RDF structures. In the Semantic Web no trust and access control mechanisms exist. The purpose of the thesis is to solve the problems of storing, representing and accessing knowledge stored in the RDF form, expanded with new possibilities of expressing trust. The thesis introduces the RDF graph store, and proposes semistructural documents together with serialization, trust metrics, methods of subgraph selection and a possibility of handling agent identity. Furthermore, the model of a system, which utilizes the proposed algorithms and methods is proposed. Finally, the work describes the implementation and evaluation of a prototype system, which combines all of the introduced mechanisms. Performance is evaluated using benchmark data [23]. In comparison with other state-of-the-art RDF graph stores, the proposed methods and algorithms provide superior or comparable performance results, in spite of the fact that they are designed to work with trust and security measures.
PKT classification
4100
KBN classification
28-Informatyka
EU classification
4100
Thesis file
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Uniform Resource Identifier
https://repo.pw.edu.pl/info/phd/WUT262927/
URN
urn:pw-repo:WUT262927

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