W3Schools.com

XML Schema selector Element


XML Schema Reference Complete XML Schema Reference

Definition and Usage

The selector element specifies an XPath expression that selects a set of elements for an identity constraint (unique, key, and keyref elements).

Element Information

  • Parent elements: key, keyref, unique

Syntax

<selector
id=ID
xpath=a subset of XPath expression
any attributes
>

(annotation?)

</selector>

(The ? sign declares that the element can occur zero or one time inside the selector element)

Attribute Description
id Optional. Specifies a unique ID for the element
xpath Required. Specifies an XPath expression, relative to the element being declared, that identifies the child elements to which the identity constraint applies
any attributes Optional. Specifies any other attributes with non-schema namespace


XML Schema Reference Complete XML Schema Reference

W3Schools Certification

W3Schools' Online Certification

The perfect solution for professionals who need to balance work, family, and career building.

More than 10 000 certificates already issued!

Get Your Certificate »

The HTML Certificate documents your knowledge of HTML.

The CSS Certificate documents your knowledge of advanced CSS.

The JavaScript Certificate documents your knowledge of JavaScript and HTML DOM.

The jQuery Certificate documents your knowledge of jQuery.

The XML Certificate documents your knowledge of XML, XML DOM and XSLT.

The ASP Certificate documents your knowledge of ASP, SQL, and ADO.

The PHP Certificate documents your knowledge of PHP and SQL (MySQL).

WEB HOSTING
Best Web Hosting
PHP MySQL Hosting
Best Hosting Coupons
UK Reseller Hosting
Cloud Hosting
Top Web Hosting
$7.95/mo SEO Hosting
Premium Website Design
WEB BUILDING
Download XML Editor
FREE Website BUILDER
Free Website Templates Free CSS Templates
Make Your Own Website
W3SCHOOLS EXAMS
Get Certified in:
HTML, CSS, JavaScript, XML, PHP, and ASP
W3SCHOOLS BOOKS
New Books:
HTML, CSS
JavaScript, and Ajax
STATISTICS
Browser Statistics
Browser OS
Browser Display
SHARE THIS PAGE