• Chapter 1: Getting Started with Stylus Studio®
• Chapter 2: Editing and Querying XML
• Chapter 3: Converting Non-XML Files to XML
• Chapter 4: Working with XSLT
• Chapter 5: Creating XSLT Using the XSLT Mapper
• Chapter 6: Debugging Stylesheets
• Chapter 7: Defining XML Schemas
• Chapter 8: Defining Document Type Definitions
• Chapter 9: Writing XPath Expressions
• Chapter 10: Working with XQuery in Stylus Studio
  • Getting Started with XQuery in Stylus Studio
    • What is XQuery?
      • Example
      • Sources for Additional XQuery Information
    • What is an XQuery?
    • The Stylus Studio XQuery Editor
  • An XQuery Primer
  • Understanding FLWOR Expressions
  • Building an XQuery Using the Mapper
  • Working with the XQuery collection() Function
  • Debugging XQuery Documents
  • Using DataDirect XQuery® Execution Plans
  • Creating an XQuery Scenario
  • Generating XQuery Documentation
  • Using XQuery to Invoke a Web Service
  • Using Web Services in XQuery
  • Generating Java Code for XQuery
  • Generating C# Code for XQuery
• Chapter 11: Composing Web Service Calls
• Chapter 12: Working with WSDL Documents
• Chapter 13: Building XML Pipelines
• Chapter 14: Publishing XML Data
• Chapter 15: Integrating with Third-Party File Systems
• Chapter 16: Extending Stylus Studio
• Chapter 17: The Stylus Studio Java API
• Chapter 18: Stylus Studio GUI Reference

Home > Online Product Documentation > Table of Contents > What is XQuery?

What is XQuery?

XML Query (XQuery) is the World Wide Web Consortium (W3C) language for querying XML. XQuery is a language developed by the W3C XML Query working group.

Example

The XQuery grammar allows you to define expressions like those shown in the following sample XQuery, R-Q2.xquery:

<result>
               
	{
               
		for $i in document("items.xml")/items/item_tuple
               
		let $b := document("bids.xml")//bid_tuple[itemno = $i/itemno]
               
		where contains($i/description,"Bicycle")
               
		order by $i/itemno
               
		return
               
		<item_tuple>
               
			{$i/itemno}
               
			{$i/description}
               
			<high_bid>
               
				{ max ( for $c in $b/bid return xs:decimal($c) ) }
               
			</high_bid>
               
		</item_tuple>
               
	}
               
</result>
               

            

This and other XQuery examples are provided in the Stylus Studio examples\XQuery directory.

Sources for Additional XQuery Information

See An XQuery Primer if you are just getting started with XQuery. For more detailed information, including the formal W3C XQuery specification, visit http://www.w3.org/XML/Query (the W3C page for XML Query).