XmlSchemaAttributeGroup Class
Class for attribute groups. Groups a set of attribute declarations so that they can be incorporated as a group into complex type definitions. Represents the World Wide Web Consortium (W3C) attributeGroup element.
For a list of all members of this type, see XmlSchemaAttributeGroup Members.
System.Object
System.Xml.Schema.XmlSchemaObject
System.Xml.Schema.XmlSchemaAnnotated
System.Xml.Schema.XmlSchemaAttributeGroup
[Visual Basic] Public Class XmlSchemaAttributeGroup Inherits XmlSchemaAnnotated [C#] public class XmlSchemaAttributeGroup : XmlSchemaAnnotated [C++] public __gc class XmlSchemaAttributeGroup : public XmlSchemaAnnotated [JScript] public class XmlSchemaAttributeGroup extends XmlSchemaAnnotated
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Remarks
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.
Example
[Visual Basic, C#, C++] The following example creates the attributeGroup element.
[Visual Basic] Option Strict Option Explicit 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") schema.Compile(AddressOf ValidationCallbackOne) Dim nsmgr As New XmlNamespaceManager(New NameTable()) nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema") schema.Write(Console.Out, nsmgr) End Sub 'Main Public Shared Sub ValidationCallbackOne(sender As Object, args As ValidationEventArgs) Console.WriteLine(args.Message) End Sub 'ValidationCallbackOne End Class 'XMLSchemaExamples [C#] using System; using System.Xml; using System.Xml.Schema; class XMLSchemaExamples { public static void Main() { XmlSchema schema = new XmlSchema(); // <xs:attributeGroup name="myAttributeGroup"> XmlSchemaAttributeGroup myAttributeGroup = new XmlSchemaAttributeGroup(); schema.Items.Add(myAttributeGroup); myAttributeGroup.Name = "myAttributeGroup"; // <xs:attribute name="someattribute1" type="xs:integer"/> XmlSchemaAttribute someattribute1 = 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"/> XmlSchemaAttribute someattribute2 = new XmlSchemaAttribute(); myAttributeGroup.Attributes.Add(someattribute2); someattribute2.Name = "someattribute2"; someattribute2.SchemaTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema"); // <xs:complexType name="myElementType"> XmlSchemaComplexType myElementType = new XmlSchemaComplexType(); schema.Items.Add(myElementType); myElementType.Name = "myElementType"; // <xs:attributeGroup ref="myAttributeGroup"/> XmlSchemaAttributeGroupRef myAttributeGroupRef = new XmlSchemaAttributeGroupRef(); myElementType.Attributes.Add(myAttributeGroupRef); myAttributeGroupRef.RefName = new XmlQualifiedName("myAttributeGroup"); // <xs:attributeGroup name="myAttributeGroupA"> XmlSchemaAttributeGroup myAttributeGroupA = new XmlSchemaAttributeGroup(); schema.Items.Add(myAttributeGroupA); myAttributeGroupA.Name = "myAttributeGroupA"; // <xs:attribute name="someattribute10" type="xs:integer"/> XmlSchemaAttribute someattribute10 = 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"/> XmlSchemaAttribute someattribute11 = new XmlSchemaAttribute(); myAttributeGroupA.Attributes.Add(someattribute11); someattribute11.Name = "someattribute11"; someattribute11.SchemaTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema"); // <xs:attributeGroup name="myAttributeGroupB"> XmlSchemaAttributeGroup myAttributeGroupB = new XmlSchemaAttributeGroup(); schema.Items.Add(myAttributeGroupB); myAttributeGroupB.Name = "myAttributeGroupB"; // <xs:attribute name="someattribute20" type="xs:date"/> XmlSchemaAttribute someattribute20 = new XmlSchemaAttribute(); myAttributeGroupB.Attributes.Add(someattribute20); someattribute20.Name = "someattribute20"; someattribute20.SchemaTypeName = new XmlQualifiedName("date", "http://www.w3.org/2001/XMLSchema"); // <xs:attributeGroup ref="myAttributeGroupA"/> XmlSchemaAttributeGroupRef myAttributeGroupRefA = new XmlSchemaAttributeGroupRef(); myAttributeGroupB.Attributes.Add(myAttributeGroupRefA); myAttributeGroupRefA.RefName = new XmlQualifiedName("myAttributeGroupA"); schema.Compile(new ValidationEventHandler(ValidationCallbackOne)); XmlNamespaceManager nsmgr = new XmlNamespaceManager(new NameTable()); nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema"); schema.Write(Console.Out, nsmgr); } public static void ValidationCallbackOne(object sender, ValidationEventArgs args) { Console.WriteLine(args.Message); } } [C++] #using <mscorlib.dll> #using <System.Xml.dll> using namespace System; using namespace System::Xml; using namespace System::Xml::Schema; __gc class XMLSchemaExamples { public: static void main() { XmlSchema* schema = new XmlSchema(); // <xs:attributeGroup name="myAttributeGroup"> XmlSchemaAttributeGroup* myAttributeGroup = new XmlSchemaAttributeGroup(); schema->Items->Add(myAttributeGroup); myAttributeGroup->Name = S"myAttributeGroup"; // <xs:attribute name="someattribute1" type="xs:integer"/> XmlSchemaAttribute* someattribute1 = new XmlSchemaAttribute(); myAttributeGroup->Attributes->Add(someattribute1); someattribute1->Name = S"someattribute1"; someattribute1->SchemaTypeName = new XmlQualifiedName(S"integer", S"http://www.w3.org/2001/XMLSchema"); // <xs:attribute name="someattribute2" type="xs:string"/> XmlSchemaAttribute* someattribute2 = new XmlSchemaAttribute(); myAttributeGroup->Attributes->Add(someattribute2); someattribute2->Name = S"someattribute2"; someattribute2->SchemaTypeName = new XmlQualifiedName(S"string", S"http://www.w3.org/2001/XMLSchema"); // <xs:complexType name="myElementType"> XmlSchemaComplexType* myElementType = new XmlSchemaComplexType(); schema->Items->Add(myElementType); myElementType->Name = S"myElementType"; // <xs:attributeGroup ref="myAttributeGroup"/> XmlSchemaAttributeGroupRef* myAttributeGroupRef = new XmlSchemaAttributeGroupRef(); myElementType->Attributes->Add(myAttributeGroupRef); myAttributeGroupRef->RefName = new XmlQualifiedName(S"myAttributeGroup"); // <xs:attributeGroup name="myAttributeGroupA"> XmlSchemaAttributeGroup* myAttributeGroupA = new XmlSchemaAttributeGroup(); schema->Items->Add(myAttributeGroupA); myAttributeGroupA->Name = S"myAttributeGroupA"; // <xs:attribute name="someattribute10" type="xs:integer"/> XmlSchemaAttribute* someattribute10 = new XmlSchemaAttribute(); myAttributeGroupA->Attributes->Add(someattribute10); someattribute10->Name = S"someattribute10"; someattribute10->SchemaTypeName = new XmlQualifiedName(S"integer", S"http://www.w3.org/2001/XMLSchema"); // <xs:attribute name="someattribute11" type="xs:string"/> XmlSchemaAttribute* someattribute11 = new XmlSchemaAttribute(); myAttributeGroupA->Attributes->Add(someattribute11); someattribute11->Name = S"someattribute11"; someattribute11->SchemaTypeName = new XmlQualifiedName(S"string", S"http://www.w3.org/2001/XMLSchema"); // <xs:attributeGroup name="myAttributeGroupB"> XmlSchemaAttributeGroup* myAttributeGroupB = new XmlSchemaAttributeGroup(); schema->Items->Add(myAttributeGroupB); myAttributeGroupB->Name = S"myAttributeGroupB"; // <xs:attribute name="someattribute20" type="xs:date"/> XmlSchemaAttribute* someattribute20 = new XmlSchemaAttribute(); myAttributeGroupB->Attributes->Add(someattribute20); someattribute20->Name = S"someattribute20"; someattribute20->SchemaTypeName = new XmlQualifiedName(S"date", S"http://www.w3.org/2001/XMLSchema"); // <xs:attributeGroup ref="myAttributeGroupA"/> XmlSchemaAttributeGroupRef* myAttributeGroupRefA = new XmlSchemaAttributeGroupRef(); myAttributeGroupB->Attributes->Add(myAttributeGroupRefA); myAttributeGroupRefA->RefName = new XmlQualifiedName(S"myAttributeGroupA"); schema->Compile(new ValidationEventHandler(0, ValidationCallbackOne)); XmlNamespaceManager* nsmgr = new XmlNamespaceManager(new NameTable()); nsmgr->AddNamespace(S"xs", S"http://www.w3.org/2001/XMLSchema"); schema->Write(Console::Out,nsmgr); } static void ValidationCallbackOne(Object* /*sender*/, ValidationEventArgs* args) { Console::WriteLine(args->Message); } }; int main() { XMLSchemaExamples::main(); }
[Visual Basic, C#, C++] 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>
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Requirements
Namespace: System.Xml.Schema
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family
Assembly: System.Xml (in System.Xml.dll)
See Also
XmlSchemaAttributeGroup Members | System.Xml.Schema Namespace