XQuery is a programming language created in 2007.
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XQuery (XML Query) is a query and functional programming language that queries and transforms collections of structured and unstructured data, usually in the form of XML, text and with vendor-specific extensions for other data formats (JSON, binary, etc.). The language is developed by the XML Query working group of the W3C. The work is closely coordinated with the development of XSLT by the XSL Working Group; the two groups share responsibility for XPath, which is a subset of XQuery. Read more on Wikipedia...
let $hello := "Hello World"
return $hello
(: Hello World with XQuery :)
let $i := "Hello World"
return $i
(: -------------------------------------------------------------------------------------
xproc.xqm - core xqm contains entry points, primary eval-step function and
control functions.
---------------------------------------------------------------------------------------- :)
xquery version "3.0" encoding "UTF-8";
module namespace xproc = "http://xproc.net/xproc";
(: declare namespaces :)
declare namespace p="http://www.w3.org/ns/xproc";
declare namespace c="http://www.w3.org/ns/xproc-step";
declare namespace err="http://www.w3.org/ns/xproc-error";
(: module imports :)
(: import module namespace util = "http://xproc.net/xproc/util" at "util1.xqm"; :)
import module namespace const = "http://xproc.net/xproc/const" at "const.xqm";
import module namespace parse = "http://xproc.net/xproc/parse" at "parse.xqm";
import module namespace u = "http://xproc.net/xproc/util" at "util.xqm";
(: declare options :)
declare boundary-space preserve;
declare option saxon:output "indent=yes";
(: declare functions :)
declare variable $xproc:run-step := xproc:run#6;
declare variable $xproc:parse-and-eval := ();
declare variable $xproc:declare-step := ();
declare variable $xproc:choose := ();
declare variable $xproc:try := ();
declare variable $xproc:catch := ();
declare variable $xproc:group := ();
declare variable $xproc:for-each := ();
declare variable $xproc:viewport := ();
declare variable $xproc:library := ();
declare variable $xproc:pipeline := ();
declare variable $xproc:variable := ();
(: list all declared namespaces :)
(: -------------------------------------------------------------------------- :)
declare function xproc:enum-namespaces($pipeline){
(: -------------------------------------------------------------------------- :)
<namespace name="{$pipeline/@name}">{u:enum-ns(<dummy>{$pipeline}</dummy>)}</namespace>
};
(: entry point :)
(: -------------------------------------------------------------------------- :)
declare function xproc:run($pipeline,$stdin,$dflag,$tflag,$bindings,$options){
(: -------------------------------------------------------------------------- :)
(: STEP I: preprocess :)
let $validate := ()
let $namespaces := xproc:enum-namespaces($pipeline)
let $parse := parse:explicit-bindings( parse:AST(parse:explicit-name(parse:explicit-type($pipeline))))
let $ast := element p:declare-step {$parse/@*,
parse:pipeline-step-sort( $parse/*, () )
}
(: STEP II: eval AST :)
let $eval_result := ()
(: STEP III: serialize and return results :)
let $serialized_result := $pipeline
return
$serialized_result
};
<html><body>
{
for $act in doc("hamlet.xml")//ACT
let $speakers := distinct-values($act//SPEAKER)
return
<div>
<h1>{ string($act/TITLE) }</h1>
<ul>
{
for $speaker in $speakers
return <li>{ $speaker }</li>
}
</ul>
</div>
}
</body></html>| Feature | Supported | Token | Example |
|---|---|---|---|
| Integers | ✓ | ||
| Floats | ✓ | ||
| Strings | ✓ | " | "Hello world" |
| Comments | ✓ | (: Hello World with XQuery :) |
|
| Case Insensitive Identifiers | X | ||
| Semantic Indentation | X | ||
| Line Comments | X |
| title | authors | year | publisher |
|---|---|---|---|
| XML: A Beginner's Guide: Go Beyond the Basics with Ajax, XHTML, XPath 2.0, XSLT 2.0 and XQuery | Holzner, Steven | 2009 | McGraw-Hill Education |
| XML: A Beginner's Guide: Go Beyond the Basics with Ajax, XHTML, XPath 2.0, XSLT 2.0 and XQuery | Holzner, Steven | 2009 | McGraw-Hill Education |
| title | authors | year | citations | influentialCitations |
|---|---|---|---|---|
| XQuery Reloaded | Roger Bamford and Vinayak R. Borkar and M. Brantner and Peter M. Fischer and D. Florescu and David A. Graf and D. Kossmann and Tim Kraska and D. Muresan and Sorin Nasoi and Markos Zacharioudaki | 2009 | 36 | 1 |
| XML programming with SQL/XML and XQuery | J. Funderburk and S. Malaika and B. Reinwald | 2002 | 30 | 2 |
| Design and implementation of a graphical interface to XQuery | Enrico Augurusa and Daniele Braga and A. Campi and S. Ceri | 2003 | 29 | 3 |
| Highly distributed XQuery with DXQ | M. Fernández and T. Jim and Kristi Morton and Nicola Onose and Jérôme Siméon | 2007 | 28 | 2 |
| Compiling XSLT 2.0 into XQuery 1.0 | Achille Fokoue and K. Rose and Jérôme Siméon and L. Villard | 2005 | 18 | 2 |
| XQuery in the browser | G. Fourny and Markus Pilman and D. Florescu and D. Kossmann and Tim Kraska and D. McBeath | 2009 | 17 | 0 |
| An Encoding of XQuery in Prolog | J. Almendros-Jiménez | 2009 | 17 | 1 |
| Developing an Enterprise Web Application in XQuery | Martin Kaufmann and D. Kossmann | 2009 | 15 | 0 |
| Integrating XQuery and Logic Programming | J. Almendros-Jiménez and A. Becerra-Terón and F. J. Enciso-Baños | 2009 | 14 | 0 |
| Eliminating dead-code from XQuery programs | P. Genevès and Nabil Layaïda | 2010 | 12 | 0 |
| XQuery in the browser | G. Fourny and D. Kossmann and Tim Kraska and Markus Pilman and D. Florescu | 2008 | 7 | 1 |
| Function inlining in XQuery 3.0 optimization | Leonard Wörteler and Michael Grossniklaus and C. Grün and M. Scholl | 2015 | 5 | 0 |
| Unleashing XQuery for Data-Independent Programming | Sebastian Bächle and Caetano Sauer | 2014 | 4 | 0 |
| Programming the KDD Process using XQuery | A. Romei and F. Turini | 2011 | 3 | 0 |
| An expressive bidirectional transformation language for XQuery view update (Special issue : Advanced Programming Techniques for Construction of Robust, Generic and Evolutionary Programs) | Dongxi Liu and Zhenjiang Hu and M. Takeichi | 2013 | 1 | 0 |