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XML-QL
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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XML-QL ist der Name einer Anfragesprache fΓΌr XML. Viele ihrer Ideen flossen in die Sprache XQuery ein. In der Praxis spielt XML-QL fast keine Rolle mehr, stattdessen wird meistens XQuery eingesetzt, das jedoch auf XML-QL basiert.
XML-QL wurde maΓgeblich von den AT&T Labs entwickelt und hat die besondere FΓ€higkeit, dass Join-Operationen auch auf semistrukturierten Daten durchgefΓΌhrt werden kΓΆnnen.cite-ref-1[1] XML-QL basiert auf einem where/construct Konstrukt anstatt eines select/from/where Konstrukt, wobei die construct-Klausel der select-Klausel und die where-Klausel der from- und where-Klausel entspricht.cite-ref-2[2]
Contents
β’ Weblinks
β’ Einzelnachweise
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Weblinks
β’ w3.org XML-QL: A Query Language for XML
Einzelnachweise
cite-note-11. β Michael Erdmann: Ontologien zur konzeptuellen Modellierung der Semantik von XML. Books on Demand, 2001, ISBN 3-8311-2635-6, S. 36.
cite-note-22. β Steffen Staab: Querysprachen fΓΌr XML. (PDF) In: Vorlesungsfolien zur Vorlesung Informationssysteme & Semantic Web. UniversitΓ€t Koblenz Landau, S. 1β2, abgerufen am 28. Januar 2015.