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XmlSchema.BlockDefault Property

Gets or sets the blockDefault attribute which sets the default value of the block attribute on element and complex types in the targetNamespace of the schema.

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

public XmlSchemaDerivationMethod BlockDefault { get; set; }

Property Value

Type: System.Xml.Schema.XmlSchemaDerivationMethod
An XmlSchemaDerivationMethod value representing the different methods for preventing derivation. The default value is XmlSchemaDerivationMethod.None.

The block attribute prevents a complexType or element that has the specified type of derivation from being used in place of the inherited complexType or element. This attribute's value can either be a white space separated list of restriction, extension and substitution or the value can contain #all or a list that is a subset of extension, restriction, or substitution.

The following table lists the possible values of XmlSchemaDerivationMethod.

Value

Description

None

By default, there are no restrictions on type derivations in the schema.

Empty

Overrides the default derivation method and allows any type derivations in the schema.

Extension

By default, elements in this schema cannot be derived by Extension. Applies only to element and complex type elements.

Restriction

By default, elements in this schema cannot be derived by Restriction.

Union

By default, elements in this schema cannot be derived by Union. Applies only to simple types.

List

By default, elements in this schema cannot be derived by List. Applies only to simple types.

All

#all. By default, elements in this schema cannot be derived by any method.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0
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