XmlSchemaAttributeGroup Class
Represents the attributeGroup element from the XML Schema as specified by the World Wide Web Consortium (W3C). AttributesGroups provides a mechanism to group a set of attribute declarations so that they can be incorporated as a group into complex type definitions.
Assembly: System.Xml (in System.Xml.dll)
An attribute group can be defined only as a child of the schema element. In this case, the name attribute must be present and contain the attribute, attributeGroup, or anyAttribute elements that make up the attribute group. When a complexType or an attributeGroup element includes an attribute group, the ref attribute must be present and the name attribute is not allowed.
The following example creates the attributeGroup element.
Option Strict On Option Explicit On Imports System Imports System.Xml Imports System.Xml.Schema Class XMLSchemaExamples Public Shared Sub Main() Dim schema As New XmlSchema() ' <xs:attributeGroup name="myAttributeGroup"> Dim myAttributeGroup As New XmlSchemaAttributeGroup() schema.Items.Add(myAttributeGroup) myAttributeGroup.Name = "myAttributeGroup" ' <xs:attribute name="someattribute1" type="xs:integer"/> Dim someattribute1 As New XmlSchemaAttribute() myAttributeGroup.Attributes.Add(someattribute1) someattribute1.Name = "someattribute1" someattribute1.SchemaTypeName = New XmlQualifiedName("integer", "http://www.w3.org/2001/XMLSchema") ' <xs:attribute name="someattribute2" type="xs:string"/> Dim someattribute2 As New XmlSchemaAttribute() myAttributeGroup.Attributes.Add(someattribute2) someattribute2.Name = "someattribute2" someattribute2.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema") ' <xs:complexType name="myElementType"> Dim myElementType As New XmlSchemaComplexType() schema.Items.Add(myElementType) myElementType.Name = "myElementType" ' <xs:attributeGroup ref="myAttributeGroup"/> Dim myAttributeGroupRef As New XmlSchemaAttributeGroupRef() myElementType.Attributes.Add(myAttributeGroupRef) myAttributeGroupRef.RefName = New XmlQualifiedName("myAttributeGroup") ' <xs:attributeGroup name="myAttributeGroupA"> Dim myAttributeGroupA As New XmlSchemaAttributeGroup() schema.Items.Add(myAttributeGroupA) myAttributeGroupA.Name = "myAttributeGroupA" ' <xs:attribute name="someattribute10" type="xs:integer"/> Dim someattribute10 As New XmlSchemaAttribute() myAttributeGroupA.Attributes.Add(someattribute10) someattribute10.Name = "someattribute10" someattribute10.SchemaTypeName = New XmlQualifiedName("integer", "http://www.w3.org/2001/XMLSchema") ' <xs:attribute name="someattribute11" type="xs:string"/> Dim someattribute11 As New XmlSchemaAttribute() myAttributeGroupA.Attributes.Add(someattribute11) someattribute11.Name = "someattribute11" someattribute11.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema") ' <xs:attributeGroup name="myAttributeGroupB"> Dim myAttributeGroupB As New XmlSchemaAttributeGroup() schema.Items.Add(myAttributeGroupB) myAttributeGroupB.Name = "myAttributeGroupB" ' <xs:attribute name="someattribute20" type="xs:date"/> Dim someattribute20 As New XmlSchemaAttribute() myAttributeGroupB.Attributes.Add(someattribute20) someattribute20.Name = "someattribute20" someattribute20.SchemaTypeName = New XmlQualifiedName("date", "http://www.w3.org/2001/XMLSchema") ' <xs:attributeGroup ref="myAttributeGroupA"/> Dim myAttributeGroupRefA As New XmlSchemaAttributeGroupRef() myAttributeGroupB.Attributes.Add(myAttributeGroupRefA) myAttributeGroupRefA.RefName = New XmlQualifiedName("myAttributeGroupA") Dim schemaSet As New XmlSchemaSet() AddHandler schemaSet.ValidationEventHandler, AddressOf ValidationCallbackOne schemaSet.Add(schema) schemaSet.Compile() Dim compiledSchema As XmlSchema = Nothing For Each schema1 As XmlSchema In schemaSet.Schemas() compiledSchema = schema1 Next Dim nsmgr As New XmlNamespaceManager(New NameTable()) nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema") compiledSchema.Write(Console.Out, nsmgr) End Sub 'Main Public Shared Sub ValidationCallbackOne(ByVal sender As Object, ByVal args As ValidationEventArgs) Console.WriteLine(args.Message) End Sub 'ValidationCallbackOne End Class 'XMLSchemaExamples
The following XML file is generated for the preceding code example.
<?xml version="1.0" encoding="IBM437"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:attributeGroup name="myAttributeGroup">
<xs:attribute name="someattribute1" type="xs:integer"/>
<xs:attribute name="someattribute2" type="xs:string"/>
</xs:attributeGroup>
<xs:complexType name="myElementType">
<xs:attributeGroup ref="myAttributeGroup"/>
</xs:complexType>
<xs:attributeGroup name="myAttributeGroupA">
<xs:attribute name="someattribute10" type="xs:integer"/>
<xs:attribute name="someattribute11" type="xs:string"/>
</xs:attributeGroup>
<xs:attributeGroup name="myAttributeGroupB">
<xs:attribute name="someattribute20" type="xs:date"/>
<xs:attributeGroup ref="myAttributeGroupA"/>
</xs:attributeGroup>
</xs:schema>
System.Xml.Schema.XmlSchemaObject
System.Xml.Schema.XmlSchemaAnnotated
System.Xml.Schema.XmlSchemaAttributeGroup
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The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.