W3Schools
home HOME Tutorials | References | Examples | Forum | About
Search W3Schools :

Schema Tutorial
XSD HOME
XSD Intro
XSD Why Use
XSD How To
XSD <schema>

Simple Types
XSD Elements
XSD Attributes
XSD Restrictions

Complex Types
XSD Elements
XSD Empty
XSD Elements Only
XSD Text Only
XSD Mixed
XSD Indicators
XSD <any>
XSD <anyAttribute>
XSD Substitution
XSD Example

Data Types
XSD String
XSD Date
XSD Numeric
XSD Misc

XSD Summary

References
XSD Reference
XSD Validator

Selected Reading
Web Statistics
Web Glossary
Web Hosting
Web Quality

W3Schools Tutorials
W3Schools Forum

Helping W3Schools

XML Schema keyref Element


XML Schema Reference Complete XML Schema Reference

Definition and Usage

The keyref element specifies that an attribute or element value correspond to those of the specified key or unique element.

The keyref element MUST contain the following (in order):

  • one and only one selector element  (contains an XPath expression that specifies the set of elements across which the values specified by field must be unique)
  • one or more field elements (contains an XPath expression that specifies the values that must be unique for the set of elements specified by the selector element)

Element Information

  • Parent elements: element

Syntax

<keyref
id=ID
name=NCName
refer=QName
any attributes
>
(annotation?,(selector,field+))
</include>

(The ? sign declares that the element can occur zero or one time, and the + sign declares that the element must occur one or more times inside the keyref element)

Attribute Description
id Optional. Specifies a unique ID for the element
name Required. Specifies the name of the keyref element
refer Required. Specifies the name of a key or unique element defined in this or another schema
any attributes Optional. Specifies any other attributes with non-schema namespace


XML Schema Reference Complete XML Schema Reference


Ektron CMS400.NET Ektron - What do you want your website to do?
The Ektron Intranet
Take the video tour

The Ektron Intranet lets you do everything you need to do on your corporate intranet and everything you want to do... all with just one application.

What can you do with the Ektron Intranet?

Ektron

Navigate through content, documents, assets, colleagues and workgroups quickly and intuitively with enterprise search

Ektron

Communicate with friends and colleagues with forums, message boards and corporate blogging using the new Social Networking Platform

Ektron

Utilize the extensive out-of-the box features or customize your site through Ektron CMS400.NET's open architecture

Ektron

Promote collaboration in your organization through project workspaces where others can efficiently find information and work together

Ektron

Author/edit content, manage navigation, menus, audit trails, workflow and approvals with the best in breed Content Management

See why there are 20,000+ Ektron integrations worldwide.

Take the Video Tour TAKE THE VIDEO TOUR
Take the Video Tour or download a FREE TRIAL today.


Jump to: Top of Page or HOME or Printer Friendly Printer friendly page

W3Schools provides material for training only. We do not warrant the correctness of its contents. 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 1999-2008 by Refsnes Data. All Rights Reserved.

Validate Validate W3C-WAI level A conformance icon W3Schools was converted to XHTML in December 1999