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A purpose-based access control in native xml databases

CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 2012年第10期24卷 1154-1166页

作者： Sun, Lili Wang, Hua Univ So Queensland Dept Maths & Comp Toowoomba Qld 4350 Australia

With the growing importance of privacy in data access, much research has been done on the privacy protecting technology in the recent years. Developing an access control model and related mechanisms to support a selective access data has become important. The extensible markup language (xml) is rapidly emerging as the new standard language for semi-structured data representation and exchange on the Internet with more and more information being distributed in xml format. In this paper, we present a comprehensive approach for privacy preserving access control based on the notion of purpose. In our model, purpose information associated with a given data element in an xml document specifies the intended use of the data elements. An important issue addressed in this paper is the granularity of data labeling for data elements in xml documents and tree databases with which purposes can be associated. We address this issue in native xml databases and propose different labeling schemes for xml documents. We also propose an approach to represent purpose information to support access control based on purpose information. Our proposed solution relies on usage access control models as well as the components that are based on the notions of the purpose information used in subjects and objects. Finally, comparisons with related works are analysed. Copyright (c) 2011 John Wiley & Sons, Ltd.

关键词： native xml databases usage access control purpose authorization

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NoSQL Systems for Big Data Management 10

NoSQL Systems for Big Data Management

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IEEE World Congress on Services (SERVICES)

作者： Gudivada, Venkat N. Rao, Dhana Raghavan, Vijay V. Marshall Univ Weisburg Div Comp Sci Huntington WV 25755 USA Marshall Univ Dept Biol Sci Huntington WV USA Univ Louisiana Lafayette Ctr Adv Comp Studies Lafayette LA 70504 USA

ISBN: (纸本)9781479950690

The advent of Big Data created a need for out-of-the-box horizontal scalability for data management systems. This ushered in an array of choices for Big Data management under the umbrella term NoSQL. In this paper, we provide a taxonomy and unified perspective on NoSQL systems. Using this perspective, we compare and contrast various NoSQL systems using multiple facets including system architecture, data model, query language, client API, scalability, and availability. We group current NoSQL systems into seven broad categories: Key-Value, Table-type/Column, Document, Graph, native xml, native Object, and Hybrid databases. We also describe application scenarios for each category to help the reader in choosing an appropriate NoSQL system for a given application. We conclude the paper by indicating future research directions.

关键词： Data Models NoSQL NewSQL Big Data Graph databases Document databases native xml databases

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A STUDY OF native xml databases Document Update, Querying, Access Control and Application Programming Interfaces in native xml databases

A STUDY OF NATIVE XML DATABASES <i>Document Update, Querying...

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5th International Conference on Web Information Systems and Technologies

作者： Martinez-Gonzalez, M. Mercedes Martinez-Prieto, Miguel A. Munoz-Nieto, Maria Univ Valladolid Dept Comp Sci Valladolid Spain

ISBN: (纸本)9789898111814

native xml databases (NXD) are called to play a crucial role in the near future. The experience with relational databases shows that standard methods for accessing and manipulating databases are necessary if wide acceptance of these database systems is to be expected in information systems whose applications should access databases preferably through standard APIs. In this paper, the current state of APIs that provide standard access to NXD, standard query languages and standard methods for document update and access control are analyzed from the perspective acquired with our experience using NXD in information systems. Our conclusions show the weak points which still need to be improved as compared with relational databases.

关键词： native xml databases NXD Standard APIs Access control Document update Query language

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Insertion and Querying Mechanism for a Distributed xml Database System 12

Insertion and Querying Mechanism for a Distributed XML Datab...

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5th ACM COMPUTE Conference

作者： Kulkarni, Abhinandan M. Thirunavukkarasu, Janani Pillai, Parvathy S. Sulegai, Sneha Somanath Rao, Shrisha Int Inst Informat Technol Bangalore Bangalore Karnataka India

ISBN: (纸本)9781450314404

xml fi les are ideal for describing semi structured data. The advent of native xml databases has enhanced storage of a large number of xml fi les preserving the hierarchical format. The challenge is to serve and access xml data from geographically distributed native xml databases. In this paper, we discuss the modus operandi for insertion and querying of data in a location transparent manner in decentralised networks. We present the design for a cluster based architecture where query processingF is achieved using distributed hash tables. A bulk insertion method has been employed for insertion of xml data. The proposed design was implemented on eXist-db, a native xml database engine. Experiments were conducted and the effectiveness of the proposed design was evaluated.

关键词： Distributed xml databases native xml databases Bulk Insertion Distributed Query Processing

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Handling of current time in native xml databases 06

Handling of current time in native XML databases

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Proceedings of the 17th Australasian Database Conference - Volume 49

作者： Bela Stantic Guido Governatori Abdul Sattar Institute for Integrated and Intelligent Systems Griffith University Brisbane Australia School of Information Technology and Electrical Engineering The University of Queensland Brisbane Australia

ISBN: (纸本)9781920682316

The introduction of native xml databases opens many research questions related to the data models used to represent and manipulate data, including temporal data, in xml. Increasing use of xml for Valid Web pages warrants an adequate treatment of now in native xml databases. In this study, we examined how to represent and manipulate now-relative temporal data. We identify different approaches being used to represent current time in xml temporal databases, and introduce the notion of storing variables such as 'now' or 'UC' as strings in xml native databases. All approaches are empirically evaluated on a query that time-slices the timeline at the current time. The experimental results indicate that the proposed extension offers several advantages over other approaches: better semantics, less storage space and better response time.

关键词： temporal databases native xml databases current time

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3D_xml: A three-dimensional xml-based model 1

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34th Conference on Current Trends in Theory and Practice of Computer Science

作者： Ali, Khadija Pokorny, Jaroslav Czech Tech Univ Fac Elect Engn CR-16635 Prague Czech Republic Charles Univ Prague Fac Math & Phys Prague Czech Republic

ISBN: (数字)9783540775669

ISBN: (纸本)9783540775652

Much research work has recently focused on the problem of representing historical information in xml. In this paper, we describe an ongoing work to represent xml changes. Our model is a three-dimensional xml-based model (3D_xml in short) for representing and querying histories of xml documents. The proposed model incorporates three time dimensions, valid time, transaction time, and efficacy time without extending the syntax of xml. We use XQuery to express complex temporal queries on the evolution of the document contents. We believe that native xml databases (NXDs) present a viable alternative to relational temporal databases when complex time dependent data has to be manipulated and stored. So NXDs will be our choice.

关键词： xml 3D_xml model transaction time valid time efficacy time XQuery three-dimensional element native xml databases

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Fuzzy data representation and querying in xml database

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INTERNATIONAL JOURNAL OF UNCERTAINTY FUZZINESS AND KNOWLEDGE-BASED SYSTEMS 2007年第1期15卷 43-57页

作者： Ustunkaya, Ekin Yazici, Adnan George, Roy Middle E Tech Univ Dept Comp Engn TR-06531 Ankara Turkey Clark Atlanta Univ Dept Comp Sci Atlanta GA 30314 USA

Real-world information including subjective opinions and judgments need imprecise data to be modeled for representation and querying in databases. The Extensible Markup Language (xml) has become a de-facto standard for data modeling and exchange in recent years. Efforts on modeling imprecision and representing such data in xml have not been fully developed. In this paper, an xml based fuzzy data representation and querying system is presented. Complex and imprecise data are represented using a fuzzy extension of xml. The representation forms the basis for a system which enables fuzzy querying on xml documents using XQuery, a xml query language. The system also enables restructuring of xml Schemas through merging of elements of the xml documents. By using this feature of the system, application specific xml Schema and xml documents can be generated from the existing documents.

关键词： fuzzy query xml native xml databases

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RepliX: um mecanismo para a replicação de dados xml

RepliX: um mecanismo para a replicação de dados XML

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作者： Sousa, Flávio Rubens de Carvalho Universidade de Lisboa

xml tem se tornado um padrão amplamente utilizado na representação e troca de dados em aplicações. Devido a essa crescente utilização do xml, torna-se necessária a existênc... 详细信息

xml tem se tornado um padrão amplamente utilizado na representação e troca de dados em aplicações. Devido a essa crescente utilização do xml, torna-se necessária a existência de sistemas eficientes de armazenamento e recuperação de dados xml. Estão sendo desenvolvidos para este fim Bancos de Dados xml Nativos (BDXNs). Estes bancos implementam muitas das características presentes em Bancos de Dados tradicionais, tais como armazenamento, indexação, processamento de consultas, transações e replicação. Tratando-se especificamente de replicação, a maioria das soluções existentes resolve essa questão apenas utilizando técnicas tradicionais. Todavia, a exibilidade dos dados xml impõe novos desafios, de modo que novas técnicas de replicação devem ser desenvolvidas. Para melhorar o desempenho e a disponibilidade dos BDXNs, esta dissertação propõe o RepliX, um mecanismo para replicação de dados xml que considera as principais características desses dados. Dessa forma, é possível melhorar o tempo de resposta no processamento de consultas e tornar esses sistemas mais tolerantes a falhas. Dentre vários tipos de protocolos de replicação, a utilização da abstração de comunicação em grupos como estratégia de comunicação e detecção de falhas mostrase uma solução eficaz, visto que essa abstração possui técnicas eficientes para troca de mensagens e provê garantias de confiabilidade. Essa estratégia é utilizada no RepliX, que organiza os sites em dois grupos: de atualização e de leitura, permitindo assim balanceamento de carga entre os sites, além de tornar o sistema menos sensível a falhas, já que não há um ponto de falha único em cada grupo. Para validar o RepliX, uma nova camada de replicação foi implementada em um BDXN, a _m de introduzir as características e os comportamentos descritos no mecanismo proposto. Experimentos foram feitos usando essa camada e os resultados obtidos atestam a sua eficácia considerando diferentes aspectos de um banco de dados replicado, melhorando o desem

关键词： Ciência da computação BDs xml Nativos Comunicação em grupo - Replicação native xml databases Group communication Replication Dissertação

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xml database support for program trace visualisation 04

XML database support for program trace visualisation

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Proceedings of the 2004 Australasian symposium on Information Visualisation - Volume 35

作者： Craig Anslow Stuart Marshall Robert Biddle James Noble Kirk Jackson Victoria University of Wellington Wellington New Zealand

ISBN: (纸本)9781920682170

Program traces can be used to drive visualisations of reusable components, but such traces can be gigabytes in size, are very expensive to generate, and are hard to extract information from. We have developed a solution to this problem, an xml Data Storage Environment (XDSE) for storing xml based program traces in a native xml database. We use XQuery to extract information from the program traces and the results are then transformed into understandable visualisations.

关键词： native xml databases software visualisation XQuery program traces component reuse

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Temporální xml databáze

Temporální XML databáze

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作者： Kunovský, Tomáš Brno University of Technology

Primárním cílem práce je implementace temporální xml databáze v jazyce Java. Jsou zde popsány databáze ukládající xml dokumenty a temporální datab&... 详细信息

Primárním cílem práce je implementace temporální xml databáze v jazyce Java. Jsou zde popsány databáze ukládající xml dokumenty a temporální databáze s důrazem na jejich dotazovací jazyky a je zde rozebrána problematika uložení dat v temporálních databázích. Zdrojové kódy výsledné aplikace jsou zveřejněny jako open-source.

关键词： temporální databáze xml Java SQL XPath XQuery Oracle nativní xml databáze čas platnosti čas transakce temporal databases xml Java SQL XPath XQuery Oracle native xml databases valid time transaction time Text

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