منابع مشابه
Evaluation of XPath queries against XML streams
XML is nowadays the de facto standard for electronic data interchange on the Web. Available XML data ranges from small Web pages to ever-growing repositories of, e.g., biological and astronomical data, and even to rapidly changing and possibly unbounded streams, as used in Web data integration and publish-subscribe systems. Animated by the ubiquity of XML data, the basic task of XML querying is...
متن کاملRewriting XPath queries using materialized XPath views
Let XP(/, //, [ ]) be the fragment of XPath 1.0, consisting of queries that involve only the child and descendant axes, and predicates without disjunction or negation (and no wildcard nodetests); these queries can be represented as tree patterns. We consider the problem of rewriting a query Q using a materialized view V , where Q,V ∈ XP(/, //, [ ]). We present more efficient algorithms for the ...
متن کاملFiltering Unsatisfiable XPATH Queries
The satisfiability test checks, whether or not the evaluation of a query returns the empty set for any input document, and can be used in query optimization for avoiding the submission and the computation of unsatisfiable queries. Thus, applying the satisfiability test before executing a query can save processing time and query costs. We focus on the satisfiability problem for queries formulate...
متن کاملTranslating XPath Queries into SPARQL Queries
M. Droop, M. Flarer, J. Groppe, S. Groppe, V. Linnemann, J. Pinggera, F. Santner, M. Schier, F. Schöpf, H. Staffler and S. Zugal 1 University of Innsbruck, Technikerstrasse 21a, A-6020 Innsbruck, Austria [email protected], [email protected], {Jakob.Pinggera, Florian.Santner}@student.uibk.ac.at, [email protected], [email protected], {Hannes.Staffler, Stefan.Zugal}@student.ui...
متن کاملEmbedding Xpath Queries into SPARQL Queries
While XPath is an established query language developed by the W3C for XML, SPARQL is a new query language developed by the W3C for RDF data. Comparisons between the data models of XML and RDF and between the query languages XPath and SPARQL are missing. Since XML and XPath are earlier recommendations of the W3C than RDF and SPARQL, currently more XML data and XPath queries are used in applicati...
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ژورنال
عنوان ژورنال: Revue Africaine de la Recherche en Informatique et Mathématiques Appliquées
سال: 2017
ISSN: 1638-5713
DOI: 10.46298/arima.3108