XML Schema Documentation

Table of Contents

top

Schema Document Properties

Target Namespace http://schemas.microsoft.com/ado/2008/10/edmx
Element and Attribute Namespaces
  • Global element and attribute declarations belong to this schema's target namespace.
  • By default, local element declarations belong to this schema's target namespace.
  • By default, local attribute declarations have no namespace.
Schema Composition
  • This schema imports schema(s) from the following namespace(s):
    • http://schemas.microsoft.com/ado/2006/04/codegeneration (at System.Data.Resources.CodeGenerationSchema.xsd)
    • http://schemas.microsoft.com/ado/2009/02/edm/ssdl (at System.Data.Resources.SSDLSchema_2.xsd)
    • http://schemas.microsoft.com/ado/2008/09/edm (at System.Data.Resources.CSDLSchema_2.xsd)
    • http://schemas.microsoft.com/ado/2008/09/mapping/cs (at System.Data.Resources.CSMSL_2.xsd)
    • http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator (at System.Data.Resources.EntityStoreSchemaGenerator.xsd)
Documentation Entity Data Model Designer Schema Copyright (c) Microsoft Corp. All rights reserved.

Declared Namespaces

Prefix Namespace
xml http://www.w3.org/XML/1998/namespace
edmx http://schemas.microsoft.com/ado/2008/10/edmx
msl http://schemas.microsoft.com/ado/2008/09/mapping/cs
gen http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator
ssdl http://schemas.microsoft.com/ado/2009/02/edm/ssdl
csdl http://schemas.microsoft.com/ado/2008/09/edm
cg http://schemas.microsoft.com/ado/2006/04/codegeneration
xs http://www.w3.org/2001/XMLSchema
Schema Component Representation
<xs:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://schemas.microsoft.com/ado/2008/10/edmx">
<xs:import namespace="http://schemas.microsoft.com/ado/2006/04/codegeneration" schemaLocation="System.Data.Resources.CodeGenerationSchema.xsd"/>
<xs:import namespace="http://schemas.microsoft.com/ado/2009/02/edm/ssdl" schemaLocation="System.Data.Resources.SSDLSchema_2.xsd"/>
<xs:import namespace="http://schemas.microsoft.com/ado/2008/09/edm" schemaLocation="System.Data.Resources.CSDLSchema_2.xsd"/>
<xs:import namespace="http://schemas.microsoft.com/ado/2008/09/mapping/cs" schemaLocation="System.Data.Resources.CSMSL_2.xsd"/>
<xs:import namespace="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" schemaLocation="System.Data.Resources.EntityStoreSchemaGenerator.xsd"/>
...
</xs:schema>
top

Global Declarations

Attribute: CopyToSSDL

Name CopyToSSDL
Type xs:boolean
XML Instance Representation
edmx:CopyToSSDL="xs:boolean"
Schema Component Representation
<xs:attribute name="CopyToSSDL" type="xs:boolean"/>
top

Attribute: MergeMode

Name MergeMode
Type edmx:TMergeMode
XML Instance Representation
edmx:MergeMode="edmx:TMergeMode"
Schema Component Representation
<xs:attribute name="MergeMode" type="edmx:TMergeMode"/>
top

Element: Edmx

Name Edmx
Type edmx:TEdmx
Nillable no
Abstract no
XML Instance Representation
<edmx:Edmx
Version="xs:string [1]">
Start Choice [1]
Start Group: edmx:GDesignerDataGroup [0..1]
<edmx:Designer> edmx:TDesigner </edmx:Designer> [0..1]
End Group: edmx:GDesignerDataGroup
Start Choice [1]
<edmx:Runtime> edmx:TRuntime </edmx:Runtime> [0..1]
<edmx:DataServices> edmx:TDataServices </edmx:DataServices> [0..1]
End Choice
End Choice
</edmx:Edmx>
Schema Component Representation
<xs:element name="Edmx" type="edmx:TEdmx"/>
top

Global Definitions

Complex Type: TAssociationConnector

Super-types: None
Sub-types: None
Name TAssociationConnector
Abstract no
XML Instance Representation
<...
Association="xs:string [1]"
ManuallyRouted="xs:boolean [0..1]">
<edmx:ConnectorPoint> edmx:TConnectorPoint </edmx:ConnectorPoint> [0..*]
</...>
Schema Component Representation
<xs:complexType name="TAssociationConnector">
<xs:sequence>
<xs:element name="ConnectorPoint" type="edmx:TConnectorPoint" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="Association" type="xs:string" use="required"/>
<xs:attribute name="ManuallyRouted" type="xs:boolean" use="optional"/>
</xs:complexType>
top

Complex Type: TConnection

Super-types: None
Sub-types: None
Name TConnection
Abstract no
XML Instance Representation
<...>
<edmx:DesignerInfoPropertySet> edmx:TDesignerInfoPropertySet </edmx:DesignerInfoPropertySet> [0..1]
</...>
Schema Component Representation
<xs:complexType name="TConnection">
<xs:sequence>
<xs:element name="DesignerInfoPropertySet" type="edmx:TDesignerInfoPropertySet" minOccurs="0" maxOccurs="1"/>
</xs:sequence>
</xs:complexType>
top

Complex Type: TConnectorPoint

Super-types: None
Sub-types: None
Name TConnectorPoint
Abstract no
XML Instance Representation
<...
PointX="xs:double [1]"
PointY="xs:double [1]"/>
Schema Component Representation
<xs:complexType name="TConnectorPoint">
<xs:attribute name="PointX" type="xs:double" use="required"/>
<xs:attribute name="PointY" type="xs:double" use="required"/>
</xs:complexType>
top

Complex Type: TDataServices

Super-types: None
Sub-types: None
Name TDataServices
Abstract no
XML Instance Representation
<...>
<csdl:Schema> ... </csdl:Schema> [0..*]
</...>
Schema Component Representation
<xs:complexType name="TDataServices">
<xs:sequence>
<xs:element ref="csdl:Schema" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
top

Complex Type: TDesigner

Super-types: None
Sub-types: None
Name TDesigner
Abstract no
XML Instance Representation
<...>
<edmx:Connection> edmx:TConnection </edmx:Connection> [0..1]
<edmx:Options> edmx:TOptions </edmx:Options> [0..1]
<edmx:Diagrams> edmx:TDiagrams </edmx:Diagrams> [0..1]
Allow any elements from a namespace other than this schema's namespace (lax validation). [0..*]
</...>
Schema Component Representation
<xs:complexType name="TDesigner">
<xs:sequence>
<xs:element name="Connection" type="edmx:TConnection" minOccurs="0" maxOccurs="1"/>
<xs:element name="Options" type="edmx:TOptions" minOccurs="0" maxOccurs="1"/>
<xs:element name="Diagrams" type="edmx:TDiagrams" minOccurs="0" maxOccurs="1"/>
<xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
top

Complex Type: TDesignerInfoPropertySet

Super-types: None
Sub-types: None
Name TDesignerInfoPropertySet
Abstract no
XML Instance Representation
<...>
<edmx:DesignerProperty> edmx:TDesignerProperty </edmx:DesignerProperty> [0..*]
</...>
Schema Component Representation
<xs:complexType name="TDesignerInfoPropertySet">
<xs:sequence>
<xs:element name="DesignerProperty" type="edmx:TDesignerProperty" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
top

Complex Type: TDesignerProperty

Super-types: None
Sub-types: None
Name TDesignerProperty
Abstract no
XML Instance Representation
<...
Name="xs:string [1]"
Value="xs:string [1]"/>
Schema Component Representation
<xs:complexType name="TDesignerProperty">
<xs:attribute name="Name" type="xs:string" use="required"/>
<xs:attribute name="Value" type="xs:string" use="required"/>
</xs:complexType>
top

Complex Type: TDiagram

Super-types: None
Sub-types: None
Name TDiagram
Abstract no
XML Instance Representation
<...
Name="xs:string [1]"
DiagramId="xs:string [0..1]"
ZoomLevel="xs:int [0..1]"
ShowGrid="xs:boolean [0..1]"
SnapToGrid="xs:boolean [0..1]"
DisplayType="xs:boolean [0..1]">
Start Choice [0..*]
<edmx:EntityTypeShape> edmx:TEntityTypeShape </edmx:EntityTypeShape> [0..1]
<edmx:AssociationConnector> edmx:TAssociationConnector </edmx:AssociationConnector> [0..1]
<edmx:InheritanceConnector> edmx:TInheritanceConnector </edmx:InheritanceConnector> [0..1]
End Choice
</...>
Schema Component Representation
<xs:complexType name="TDiagram">
<xs:sequence>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="EntityTypeShape" type="edmx:TEntityTypeShape" minOccurs="0" maxOccurs="1"/>
<xs:element name="AssociationConnector" type="edmx:TAssociationConnector" minOccurs="0" maxOccurs="1"/>
<xs:element name="InheritanceConnector" type="edmx:TInheritanceConnector" minOccurs="0" maxOccurs="1"/>
</xs:choice>
</xs:sequence>
<xs:attribute name="Name" type="xs:string" use="required"/>
<-- workaround for our model test to pass -->
<-- TODO: Update the XSD version or update the namespace since DiagramId doesn't exist in the XSD released in dev10-->
<xs:attribute name="DiagramId" type="xs:string" use="optional"/>
<xs:attribute name="ZoomLevel" type="xs:int" use="optional"/>
<xs:attribute name="ShowGrid" type="xs:boolean" use="optional"/>
<xs:attribute name="SnapToGrid" type="xs:boolean" use="optional"/>
<xs:attribute name="DisplayType" type="xs:boolean" use="optional"/>
</xs:complexType>
top

Complex Type: TDiagrams

Super-types: None
Sub-types: None
Name TDiagrams
Abstract no
XML Instance Representation
<...>
<edmx:Diagram> edmx:TDiagram </edmx:Diagram> [0..*]
</...>
Schema Component Representation
<xs:complexType name="TDiagrams">
<xs:sequence>
<xs:element name="Diagram" type="edmx:TDiagram" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
top

Complex Type: TEdmx

Super-types: None
Sub-types: None
Name TEdmx
Abstract no
XML Instance Representation
<...
Version="xs:string [1]">
Start Choice [1]
Start Group: edmx:GDesignerDataGroup [0..1]
<edmx:Designer> edmx:TDesigner </edmx:Designer> [0..1]
End Group: edmx:GDesignerDataGroup
Start Choice [1]
<edmx:Runtime> edmx:TRuntime </edmx:Runtime> [0..1]
<edmx:DataServices> edmx:TDataServices </edmx:DataServices> [0..1]
End Choice
End Choice
</...>
Schema Component Representation
<xs:complexType name="TEdmx">
<xs:choice>
<xs:group ref="edmx:GDesignerFirstGroup" minOccurs="1" maxOccurs="1"/>
<-- <xs:group ref="edmx:GDesignerLastGroup" minOccurs="1" maxOccurs="1"/>-->
<-- <xs:group ref="edmx:GDesignerOnly" minOccurs="1" maxOccurs="1"/>-->
</xs:choice>
<xs:attribute name="Version" type="xs:string" use="required"/>
</xs:complexType>
top

Complex Type: TEntityTypeShape

Super-types: None
Sub-types: None
Name TEntityTypeShape
Abstract no
XML Instance Representation
<...
EntityType="xs:string [1]"
PointX="xs:double [0..1]"
PointY="xs:double [0..1]"
Width="xs:double [0..1]"
Height="xs:double [0..1]"
IsExpanded="xs:boolean [0..1]"
FillColor="xs:string [0..1]"/>
Schema Component Representation
<xs:complexType name="TEntityTypeShape">
<xs:attribute name="EntityType" type="xs:string" use="required"/>
<xs:attribute name="PointX" type="xs:double" use="optional"/>
<xs:attribute name="PointY" type="xs:double" use="optional"/>
<xs:attribute name="Width" type="xs:double" use="optional"/>
<-- The Height attribute below is no longer used by the Entity Designer but is maintained in this schema for backwards-compatibility purposes. -->
<xs:attribute name="Height" type="xs:double" use="optional"/>
<xs:attribute name="IsExpanded" type="xs:boolean" use="optional"/>
<-- TODO: Update the XSD version or update the namespace since FillColor attribute doesn't exist in the XSD released in dev10-->
<xs:attribute name="FillColor" type="xs:string" use="optional"/>
</xs:complexType>
top

Complex Type: TInheritanceConnector

Super-types: None
Sub-types: None
Name TInheritanceConnector
Abstract no
XML Instance Representation
<...
EntityType="xs:string [1]"
ManuallyRouted="xs:boolean [0..1]">
<edmx:ConnectorPoint> edmx:TConnectorPoint </edmx:ConnectorPoint> [0..*]
</...>
Schema Component Representation
<xs:complexType name="TInheritanceConnector">
<xs:sequence>
<xs:element name="ConnectorPoint" type="edmx:TConnectorPoint" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="EntityType" type="xs:string" use="required"/>
<xs:attribute name="ManuallyRouted" type="xs:boolean" use="optional"/>
</xs:complexType>
top

Complex Type: TOptions

Super-types: None
Sub-types: None
Name TOptions
Abstract no
XML Instance Representation
<...>
<edmx:DesignerInfoPropertySet> edmx:TDesignerInfoPropertySet </edmx:DesignerInfoPropertySet> [0..1]
</...>
Schema Component Representation
<xs:complexType name="TOptions">
<xs:sequence>
<xs:element name="DesignerInfoPropertySet" type="edmx:TDesignerInfoPropertySet" minOccurs="0" maxOccurs="1"/>
</xs:sequence>
</xs:complexType>
top

Complex Type: TRuntime

Super-types: None
Sub-types: None
Name TRuntime
Abstract no
XML Instance Representation
<...>
Start All [1]
<edmx:StorageModels> edmx:TRuntimeStorageModels </edmx:StorageModels> [0..1]
<edmx:ConceptualModels> edmx:TRuntimeConceptualModels </edmx:ConceptualModels> [0..1]
<edmx:Mappings> edmx:TRuntimeMappings </edmx:Mappings> [0..1]
End All
</...>
Schema Component Representation
<xs:complexType name="TRuntime">
<xs:all>
<xs:element name="StorageModels" type="edmx:TRuntimeStorageModels" minOccurs="0" maxOccurs="1"/>
<xs:element name="ConceptualModels" type="edmx:TRuntimeConceptualModels" minOccurs="0" maxOccurs="1"/>
<xs:element name="Mappings" type="edmx:TRuntimeMappings" minOccurs="0" maxOccurs="1"/>
</xs:all>
</xs:complexType>
top

Complex Type: TRuntimeConceptualModels

Super-types: None
Sub-types: None
Name TRuntimeConceptualModels
Abstract no
XML Instance Representation
<...>
<csdl:Schema> ... </csdl:Schema> [0..1]
</...>
Schema Component Representation
<xs:complexType name="TRuntimeConceptualModels">
<xs:sequence>
<xs:element ref="csdl:Schema" minOccurs="0" maxOccurs="1"/>
</xs:sequence>
</xs:complexType>
top

Complex Type: TRuntimeMappings

Super-types: None
Sub-types: None
Name TRuntimeMappings
Abstract no
XML Instance Representation
<...>
<msl:Mapping> ... </msl:Mapping> [0..1]
</...>
Schema Component Representation
<xs:complexType name="TRuntimeMappings">
<xs:sequence>
<xs:element ref="msl:Mapping" minOccurs="0" maxOccurs="1"/>
</xs:sequence>
</xs:complexType>
top

Complex Type: TRuntimeStorageModels

Super-types: None
Sub-types: None
Name TRuntimeStorageModels
Abstract no
XML Instance Representation
<...>
<ssdl:Schema> ... </ssdl:Schema> [0..1]
</...>
Schema Component Representation
<xs:complexType name="TRuntimeStorageModels">
<xs:sequence>
<xs:element ref="ssdl:Schema" minOccurs="0" maxOccurs="1"/>
</xs:sequence>
</xs:complexType>
top

Model Group: GDesignerDataGroup

Name GDesignerDataGroup
XML Instance Representation
<edmx:Designer> edmx:TDesigner </edmx:Designer> [0..1]
Schema Component Representation
<xs:group name="GDesignerDataGroup">
<xs:sequence>
<xs:element name="Designer" type="edmx:TDesigner" minOccurs="0" maxOccurs="1"/>
</xs:sequence>
</xs:group>
top

Model Group: GDesignerFirstGroup

Name GDesignerFirstGroup
XML Instance Representation
Start Group: edmx:GDesignerDataGroup [0..1]
<edmx:Designer> edmx:TDesigner </edmx:Designer> [0..1]
End Group: edmx:GDesignerDataGroup
Start Choice [1]
<edmx:Runtime> edmx:TRuntime </edmx:Runtime> [0..1]
<edmx:DataServices> edmx:TDataServices </edmx:DataServices> [0..1]
End Choice
Schema Component Representation
<xs:group name="GDesignerFirstGroup">
<xs:sequence>
<xs:group ref="edmx:GDesignerDataGroup" minOccurs="0"/>
<xs:group ref="edmx:GRuntimeDataGroup" minOccurs="1"/>
</xs:sequence>
</xs:group>
top

Model Group: GDesignerLastGroup

Name GDesignerLastGroup
XML Instance Representation
Start Choice [1]
<edmx:Runtime> edmx:TRuntime </edmx:Runtime> [0..1]
<edmx:DataServices> edmx:TDataServices </edmx:DataServices> [0..1]
End Choice
Start Group: edmx:GDesignerDataGroup [0..1]
<edmx:Designer> edmx:TDesigner </edmx:Designer> [0..1]
End Group: edmx:GDesignerDataGroup
Schema Component Representation
<xs:group name="GDesignerLastGroup">
<xs:sequence>
<xs:group ref="edmx:GRuntimeDataGroup" minOccurs="1"/>
<xs:group ref="edmx:GDesignerDataGroup" minOccurs="0"/>
</xs:sequence>
</xs:group>
top

Model Group: GDesignerOnly

Name GDesignerOnly
XML Instance Representation
<edmx:Designer> edmx:TDesigner </edmx:Designer> [0..1]
Schema Component Representation
<xs:group name="GDesignerOnly">
<xs:sequence>
<xs:group ref="edmx:GDesignerDataGroup" minOccurs="1"/>
</xs:sequence>
</xs:group>
top

Model Group: GRuntimeDataGroup

Name GRuntimeDataGroup
XML Instance Representation
Start Choice [1]
<edmx:Runtime> edmx:TRuntime </edmx:Runtime> [0..1]
<edmx:DataServices> edmx:TDataServices </edmx:DataServices> [0..1]
End Choice
Schema Component Representation
<xs:group name="GRuntimeDataGroup">
<xs:choice>
<xs:element name="Runtime" type="edmx:TRuntime" minOccurs="0" maxOccurs="1"/>
<xs:element name="DataServices" type="edmx:TDataServices" minOccurs="0" maxOccurs="1"/>
</xs:choice>
</xs:group>
top

Simple Type: TMergeMode

Super-types: xs:token < TMergeMode (by restriction)
Sub-types: None
Name TMergeMode
Content
  • Base XSD Type: token
  • value comes from list: {'OneWay'|'TwoWay'}
Schema Component Representation
<xs:simpleType name="TMergeMode">
<xs:restriction base="xs:token">
<xs:enumeration value="OneWay"/>
<xs:enumeration value="TwoWay"/>
</xs:restriction>
</xs:simpleType>
top

Legend

Complex Type:

Schema Component Type

AusAddress

Schema Component Name
Super-types: Address < AusAddress (by extension)
Sub-types:
  • QLDAddress (by restriction)
If this schema component is a type definition, its type hierarchy is shown in a gray-bordered box.
Name AusAddress
Abstract no
The table above displays the properties of this schema component.
XML Instance Representation
<... country="Australia">
<unitNo> string </unitNo> [0..1]
<houseNo> string </houseNo> [1]
<street> string </street> [1]
Start Choice[1]
<city> string </city> [1]
<town> string </town> [1]
End Choice
<state> AusStates </state> [1]
<postcode> string <<pattern = [1-9][0-9]{3}>> </postcode> [1]?
</...>

The XML Instance Representation table above shows the schema component's content as an XML instance.

Schema Component Representation
<complexTypename="AusAddress">
<complexContent>
<extensionbase="Address">
<sequence>
<elementname="state" type="AusStates"/>
<elementname="postcode">
<simpleType>
<restrictionbase="string">
<patternvalue="[1-9][0-9]{3}"/>
</restriction>
</simpleType>
</element>
</sequence>
<attributename="country" type="string" fixed="Australia"/>
</extension>
</complexContent>
</complexType>
The Schema Component Representation table above displays the underlying XML representation of the schema component. (Annotations are not shown.)
top

Glossary

Abstract (Applies to complex type definitions and element declarations). An abstract element or complex type cannot used to validate an element instance. If there is a reference to an abstract element, only element declarations that can substitute the abstract element can be used to validate the instance. For references to abstract type definitions, only derived types can be used.

All Model Group Child elements can be provided in any order in instances. See: http://www.w3.org/TR/xmlschema-1/#element-all.

Choice Model Group Only one from the list of child elements and model groups can be provided in instances. See: http://www.w3.org/TR/xmlschema-1/#element-choice.

Collapse Whitespace Policy Replace tab, line feed, and carriage return characters with space character (Unicode character 32). Then, collapse contiguous sequences of space characters into single space character, and remove leading and trailing space characters.

Disallowed Substitutions (Applies to element declarations). If substitution is specified, then substitution group members cannot be used in place of the given element declaration to validate element instances. If derivation methods, e.g. extension, restriction, are specified, then the given element declaration will not validate element instances that have types derived from the element declaration's type using the specified derivation methods. Normally, element instances can override their declaration's type by specifying an xsi:type attribute.

Key Constraint Like Uniqueness Constraint, but additionally requires that the specified value(s) must be provided. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.

Key Reference Constraint Ensures that the specified value(s) must match value(s) from a Key Constraint or Uniqueness Constraint. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.

Model Group Groups together element content, specifying the order in which the element content can occur and the number of times the group of element content may be repeated. See: http://www.w3.org/TR/xmlschema-1/#Model_Groups.

Nillable (Applies to element declarations). If an element declaration is nillable, instances can use the xsi:nil attribute. The xsi:nil attribute is the boolean attribute, nil, from the http://www.w3.org/2001/XMLSchema-instance namespace. If an element instance has an xsi:nil attribute set to true, it can be left empty, even though its element declaration may have required content.

Notation A notation is used to identify the format of a piece of data. Values of elements and attributes that are of type, NOTATION, must come from the names of declared notations. See: http://www.w3.org/TR/xmlschema-1/#cNotation_Declarations.

Preserve Whitespace Policy Preserve whitespaces exactly as they appear in instances.

Prohibited Derivations (Applies to type definitions). Derivation methods that cannot be used to create sub-types from a given type definition.

Prohibited Substitutions (Applies to complex type definitions). Prevents sub-types that have been derived using the specified derivation methods from validating element instances in place of the given type definition.

Replace Whitespace Policy Replace tab, line feed, and carriage return characters with space character (Unicode character 32).

Sequence Model Group Child elements and model groups must be provided in the specified order in instances. See: http://www.w3.org/TR/xmlschema-1/#element-sequence.

Substitution Group Elements that are members of a substitution group can be used wherever the head element of the substitution group is referenced.

Substitution Group Exclusions (Applies to element declarations). Prohibits element declarations from nominating themselves as being able to substitute a given element declaration, if they have types that are derived from the original element's type using the specified derivation methods.

Target Namespace The target namespace identifies the namespace that components in this schema belongs to. If no target namespace is provided, then the schema components do not belong to any namespace.

Uniqueness Constraint Ensures uniqueness of an element/attribute value, or a combination of values, within a specified scope. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.

top