Aliança: A Proposal for a Fuzzy Database Architecture Incorporating XML

Rodrigues, Raquel dos Anjos; Cruz, Ana Rita; Cavalcanti, Rafael T.

doi:10.1007/978-3-642-14010-5_11

Cited by 3 publications

(4 citation statements)

References 19 publications

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“…Fuzzy techniques have been also introduced recently to approximately query XML data [6], [9], [10], [12], [13], [17], [27], [32]. Buche et al [6] add flexibility to the MIEL++ system, that integrates data coming from a relational database and an XML database.…”

Section: Related Workmentioning

confidence: 98%

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XPath Query Relaxation through Rewriting Rules

Fazzinga

Flesca

Furfaro

2011

IEEE Trans. Knowl. Data Eng.

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Query relaxation is the process of weakening a query to a more general one, and it is frequently employed to support approximate query answering. In this paper, rewriting systems for a wide fragment of XPath are investigated, which accomplish query relaxation through the application of simple rewriting rules transforming navigational axes and node tests into relaxed ones. Specifically, a general yet simple form of rewriting rules is considered, which subsumes the forms adopted in several rewriting systems for approximate XPath query answering. The expressiveness of rewriting systems based on this form of rules is characterized in terms of their capability of transforming a query into every more general formulation. It is shown that traditional rewriting systems are not only incomplete w.r.t. containment, but also w.r.t. the stricter form known as containment by homomorphism. This limitation is overcome by defining a set R Ã of rewriting rules which are still of the same simple form of traditional ones, but are expressive enough to catch at least containment by homomorphism. Then, an algorithm is proposed which exploits R Ã to provide approximate answers of queries along with a measure of their approximation degree.Index Terms-XPath, query relaxation, approximate query answering, information systems.

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Section: Related Workmentioning

confidence: 98%

“…These terms can then be used to submit queries on the XML database. Rodrigues et al [27] present a fuzzy database architecture, that is the combination of fuzzy logic techniques, a database relational management system and a fuzzy metaknowledge database defined in XML. The system uses a modified SQL language to handle fuzzy data.…”

Section: Related Workmentioning

confidence: 99%

XPath Query Relaxation through Rewriting Rules

Fazzinga

Flesca

Furfaro

2011

IEEE Trans. Knowl. Data Eng.

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“…Papers on this subject deal with extending database models by introducing fuzzy types [23][24][25][26][27] or extending the SQL [28] and XQuery syntax [29,30] by fuzzy elements. Some of the significant works related to this subject are: [31][32][33][34][35].…”

Section: Related Workmentioning

confidence: 99%

Fuzzy XML and prioritized fuzzy XQuery with implementation

Panić

Racković

Škrbić

2014

Journal of Intelligent &Amp; Fuzzy Systems

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In real life, as opposed to virtual, most information comes in the form of imprecise or incomplete values. XML technology has made great progress in the field of storage and data transfer. We developed XML extension which combines indefiniteness in the values of XML and indefiniteness in the structure of XML into a single fuzzy XML extension. Furthermore, this paper expands XQuery syntax with fuzzy values and includes priorities and thresholds in fuzzy XQuery extension using GPFCSP for the first time. Unlike other papers that focus on setting up theories and defining syntax, in this paper, special attention is turned to their practical use. A tool for working with XML, XSD and DTD documents and prioritized fuzzy XQuery extension queries has been developed. One of the advantages of this tool is defining arbitrary membership functions. The developed tool enables defined fuzzy XML extension and their performance to be tested in practice.

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“…The second area of research concerns on incorporating fuzzy logic to querying fuzzy data in XML. In [34], Rodrigues et al propose a new fuzzy database architecture and present the FSQL Server. The work of Seto et al [37] proposes a system that would give non-technical users the opportunity to query for information contained in large XML documents with support for strict and fuzzy qualifiers.…”

Section: Introductionmentioning

confidence: 99%

Querying fuzzy spatiotemporal data using XQuery

Bai

2014

ICA

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How to accurately handle querying criteria based on user's preferences has become a key technology for querying fuzzy spatiotemporal data, typically collected by modern monitoring devices such as GPS receivers and sensors. However, although fuzzy logic is incorporated in querying fuzzy spatiotemporal data and querying fuzzy data in XML, relatively little work has been carried out in querying fuzzy spatiotemporal data in XML. In this paper, we propose an approach for querying fuzzy spatiotemporal data using XQuery. On the basis of its architecture, we make extensions to XQuery language. The extensions consist of the new xs: truth data type intended to represent gradual truth degrees, and the new Val element and the new Poss attribute to handle satisfaction degrees. Furthermore, fuzzy spatiotemporal linguistic terms are extended to declare fuzzy terms and use them in querying expressions. Additionally, FLWOR are extended to support fuzzy spatiotemporal queries. After extensions of XQuery on fuzzy spatiotemporal data, we present real case querying examples, discuss crucial details of their processing, and perform evaluations of each querying example. Finally, the comparative study demonstrates the advantages of our approach.

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Aliança: A Proposal for a Fuzzy Database Architecture Incorporating XML

Cited by 3 publications

References 19 publications

XPath Query Relaxation through Rewriting Rules

XPath Query Relaxation through Rewriting Rules

Fuzzy XML and prioritized fuzzy XQuery with implementation

Querying fuzzy spatiotemporal data using XQuery

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