XQuery

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XSPARQL provides concise and intuitive solutions for mapping between XML and RDF in either direction, transformations based on merging XQuery and SPARQL - by Axel Polleres et al. at DELI, 2009

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The purpose of this document is to catalog the functions and operators required for XPath 2.0, XML Query 1.0 and XSLT 2.0.

The use cases listed below were created by the XML Query Working Group to illustrate important applications for an XML query language. Each use case is focused on a specific application area, and contains a Document Type Definition (DTD) and example input data.

XQuery geht weit über die Funktionalität einer relationalen Abfragesprache hinaus und enthält eine Reihe von Features wie sie aus der funktionalen Programmierung bekannt sind. XQuery ermöglicht, umfangreiche XML-Dokumente mit Path Expressions (XPath) zu durchsuchen, es lassen sich komplexe XML-Strukturen anlegen und so genannte FLOWR-Ausdrücke (mit den Konstrukten for, let, order by, where und return) einsetzen.