XQuery

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1 Definition

Xquery, XML Query Language, is a query language that uses the structure of XML intelligently can express queries across all these kinds of data, whether physically stored in XML or viewed as XML via middleware. In other words, you can use it to retrieve things from files, from XML representations made from SQL databases, from native XML databases like eXist. In addition, Xquery is quite a real programming language.

Xqupdate, (XQuery Update Facility) is a recent (2007) language for updating xml data. There is an older proposal, XUpdate

See also XML databases, servers in which you can plug XML "as is" and get it back with Xquery. Such DBMS also may support XPath, XSLT and other means.

This is just a page with links.

See XQuery tutorial - basics

2 Documentation

2.1 Standards

2.2 XQuery Tutorials

See XQuery tutorial - basics !

2.3 Other

  • XML:DB XUpdate Use Cases by Kimbro Staken. This document outlines a basic set of uses cases for the XUpdate specification from the XML:DB Initiative.

3 Software

See also XQuery Engines, Processors, Providers at SQLSummit, retr. Jan 2010.

3.1 XML databases

See XML database

3.2 XQuery Engines

  • Zorba ships with a PHP language binding that provides some basic features in order to prepare and execute queries with Zorba (2013)
  • SAXON XSLT and XQuery Processor. There is a free version. (works).
  • XQEngine - XML Query Engine implements XQuery - sourceforge project.
  • MXQuery. low-footprint, extensible XQuery Engine (Java). Includes support for update
  • Galax. open-source implementation of XQuery 1.0.
  • Safari Guide Safari Guide is a free application for Mac OS X Tiger that allows developers to evaluate arbitrary XPath and XQuery expressions against the current frontmost Safari webpage. [10/2005]
  • XQuery USE ME (XqUSEme) Firefox add-on (based on Saxon-B, Java 1.6 update 12+ is needed). Tested, works as advertized. I used it when I teach some XQuery - Daniel K. Schneider 20:00, 19 February 2010 (UTC)
  • XQIB XQuery in the browser (IE / FF 3.5, Windows) (Feb 2010). Not tested. May need administrator rights to install on Windows, security is not guaranteed...

3.3 XML Editors with XQuery support

See XML editor for a list of XML editors

Many, e.g. XML Exchanger lite.

3.4 Libraries

For eXist
  • PheXist is a set of classes for PHP 5. (older version also for PHP4 & Perl) to query and manipulate XML documents in eXist XML:DB. (Version 0.5, april 2007). PHP 5 needs the soap extension enabled.
PHP
  • Zorba PHP extension for Zorba, an XQuery processor.

3.5 Examples

  • MarkMail. Mailing list archive that stores messages in XML. Search (under the hood) is done with Xquery.

4 Links