XmlSchemaKey Class

This class represents the key element from XMLSchema as specified by the World Wide Web Consortium (W3C).

Namespace: System.Xml.Schema
Assembly: System.Xml (in system.xml.dll)

public class XmlSchemaKey : XmlSchemaIdentityConstraint
public class XmlSchemaKey extends XmlSchemaIdentityConstraint
public class XmlSchemaKey extends XmlSchemaIdentityConstraint

Specifies that an attribute or element value (or set of values) must be a key within the specified scope. A key must be unique, non-nillable/non-nullable, and always present. The constraint name must be unique within a schema.

See XmlSchemaKeyref for an example using this class.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

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