w3schools    w3Schools
Search W3Schools :
HOME HTML CSS XML JAVASCRIPT ASP PHP SQL MORE...   References Examples Forum About

XML Certification
Download XML editor
Custom Programming
Table of contents
XQuery Basic
XQuery Intro
XQuery Example
XQuery Terms
XQuery Syntax

XQuery Advanced
XQuery Add
XQuery Select
XQuery Functions
XQuery Summary

XQuery Reference
XQuery Reference

Selected Reading
Web Statistics
Web Glossary
Web Hosting
Web Quality

W3Schools Tutorials
W3Schools Forum

Helping W3Schools


XQuery Example

previous next

Let's try to learn some basic XQuery syntax by looking at an example.

The XML Example Document

We will use the following XML document in the examples below.


<?xml version="1.0" encoding="ISO-8859-1"?>
<book category="COOKING">
  <title lang="en">Everyday Italian</title>
  <author>Giada De Laurentiis</author>
<book category="CHILDREN">
  <title lang="en">Harry Potter</title>
  <author>J K. Rowling</author>
<book category="WEB">
  <title lang="en">XQuery Kick Start</title>
  <author>James McGovern</author>
  <author>Per Bothner</author>
  <author>Kurt Cagle</author>
  <author>James Linn</author>
  <author>Vaidyanathan Nagarajan</author>
<book category="WEB">
  <title lang="en">Learning XML</title>
  <author>Erik T. Ray</author>

View the "books.xml" file in your browser.

How to Select Nodes From "books.xml"?


XQuery uses functions to extract data from XML documents.

The doc() function is used to open the "books.xml" file:


Path Expressions

XQuery uses path expressions to navigate through elements in an XML document.

The following path expression is used to select all the title elements in the "books.xml" file:


(/bookstore selects the bookstore element, /book selects all the book elements under the bookstore element, and /title selects all the title elements under each book element)

The XQuery above will extract the following:

<title lang="en">Everyday Italian</title>
<title lang="en">Harry Potter</title>
<title lang="en">XQuery Kick Start</title>
<title lang="en">Learning XML</title>


XQuery uses predicates to limit the extracted data from XML documents.

The following predicate is used to select all the book elements under the bookstore element that have a price element with a value that is less than 30:


The XQuery above will extract the following:

<book category="CHILDREN">
  <title lang="en">Harry Potter</title>
  <author>J K. Rowling</author>

previous next

The tools you need to build your web project!

Instant Demo

Ektron CMS400.NET Version 7.6 delivers all of the flexibility and features you need to deploy the Web site you want, quickly and efficiently.

learn more...




6 ways to take your site to the next level with Ektron:

Social Networking Create site stickiness through social networking. Keep it personal, relevant and interactive and they'll come back for more.
Open API Keep it open. Your site needs to be ready and able to connect to outside services. Ektron's open API gives you maximum flexibility.
Document Management Streamline content and document management. Users need to quickly and intuitively find and add information.
Content Authors Empower your content authors. Reduce IT bottlenecks by allowing business users to create and edit Web content and forms.
Taxonomy Climb to the top of search rankings. SEO tools, URL aliasing and eCommerce for your digital marketing strategy
Web 2.0 Tools Add powerful Web 2.0 tools like blogs, wikis, forums, geo-mapping, rating systems and RSS feeds easily.
See why there are 20,000+ Ektron integrations worldwide.
Request an INSTANT DEMO or download a FREE TRIAL today.

Password Protect
Your Web Pages
$15 Domain Name
Save $20 / year!
Buy UK Domain Names
Register Domain Names
Cheap Domain Names
Cheap Web Hosting
Best Web Hosting
PHP MySQL Hosting
Top 10 Web Hosting
UK Reseller Hosting
Web Hosting
FREE Web Hosting
Website Templates
Flash Templates
Website Builder
Internet Business Opportunity
Custom Programming
FREE Trial or Demo
Web Content Manager
Forms,Web Alerts,RSS
Download XML editor
FREE Flash Website
FREE Web Templates
US Web Design Schools
HTML Certification
JavaScript Certification
XML Certification
PHP Certification
ASP Certification
Home HOME or Top of Page Validate   Validate   W3C-WAI level A conformance icon Printer Friendly  Printer Friendly

W3Schools is for training only. We do not warrant the correctness of its content. The risk from using it lies entirely with the user.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2009 by Refsnes Data. All Rights Reserved.