xhtmlConformance Element (ASP.NET Settings Schema) 

Configures XHTML 1.0–conforming control rendering.

<xhtmlConformance mode="Transitional|Legacy|Strict"/>

Attributes and Elements

The following sections describe attributes, child elements, and parent elements.

Attributes

Attribute

Description

mode

An optional String attribute, which specifies the XHTML rendering mode for an ASP.NET application. The mode can be one of the values listed in the following table. The default is Transitional (XHTML 1.0 Transitional). Value Description Transitional XHTML 1.0 Transitional Strict XHTML 1.0 Strict conformance Legacy Reverts a number of rendering changes made for conformance to the v1.1 rendering behavior.

Child Elements

None.

Parent Elements

Element	Description
configuration	The required root element in every configuration file that is used by the common language runtime and .NET Framework–based applications.
system.web	Specifies the root element for the ASP.NET configuration settings in a configuration file. Contains configuration elements that configure ASP.NET Web applications and control how the applications behave.

Remarks

By default, when you are working with browsers that support HTML 4.0 or later, ASP.NET pages and controls render markup that is compatible with the XHTML 1.0 Transitional standard. However, under some circumstances, you might not want ASP.NET to render XHTML markup. This is typically true when you have existing pages that rely on tags or attributes that would ordinarily be prohibited by XHTML.

Note
Only rendering changes that are likely to break existing applications are reverted to their old behavior. There is no mechanism to revert all changes made to comply with the XHTML specification.

Default Configuration

The following default xhtmlConformance element is not explicitly configured in the machine configuration file or in the root Web.config file, but is the default configuration returned by an application in the .NET Framework version 2.0.

<xhtmlConformance mode="Transitional"/>

Example

The following code example switches the rendering mode to conform to the XHTML 1.0 strict standard. The key change that occurs is that the name attribute is no longer rendered on the form tag.

<xhtmlConformance mode="Strict"/>

Element Information

Configuration Section Handler	XhtmlConformanceSection
Configuration Member	XhtmlConformance
Configurable Locations	Machine.config Root-level Web.config Application-level Web.config Web.config
Requirements	Microsoft Internet Information Services (IIS) version 6.0 Microsoft .NET Framework version 2.0 Microsoft Visual Studio 2005

See Also

Tasks

How to: Configure Specific Directories Using Location Settings
How to: Lock ASP.NET Configuration Settings

Reference

system.web Element (ASP.NET Settings Schema)
configuration Element (General Settings Schema)
System.Configuration
System.Web.Configuration

Concepts

ASP.NET Configuration File Hierarchy and Inheritance
Securing ASP.NET Configuration
ASP.NET Configuration Scenarios

Other Resources

General Configuration Settings (ASP.NET)
ASP.NET Configuration Settings
Configuring ASP.NET Applications
ASP.NET Configuration Files
ASP.NET Configuration API