<?xml version="1.0" encoding="utf-8"?>
<xs:schema
    targetNamespace="http://opcfoundation.org/UA/2011/03/UANodeSet.xsd"
    elementFormDefault="qualified"
    xmlns="http://opcfoundation.org/UA/2011/03/UANodeSet.xsd"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
>
  <xs:element name="UANodeSet">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="NamespaceUris" type="UriTable" minOccurs="0"></xs:element>
        <xs:element name="ServerUris" type ="UriTable" minOccurs="0"></xs:element>
        <xs:element name="Models" type="ModelTable" minOccurs="0"></xs:element>
        <xs:element name="Aliases" type ="AliasTable" minOccurs="0"></xs:element>
        <xs:element name="Extensions" type="ListOfExtensions" minOccurs="0"></xs:element>
        <xs:choice minOccurs="0" maxOccurs="unbounded">
          <xs:element name="UAObject" type="UAObject"></xs:element>
          <xs:element name="UAVariable" type="UAVariable"></xs:element>
          <xs:element name="UAMethod" type="UAMethod"></xs:element>
          <xs:element name="UAView" type="UAView"></xs:element>
          <xs:element name="UAObjectType" type="UAObjectType"></xs:element>
          <xs:element name="UAVariableType" type="UAVariableType"></xs:element>
          <xs:element name="UADataType" type="UADataType"></xs:element>
          <xs:element name="UAReferenceType" type="UAReferenceType"></xs:element>
        </xs:choice>
      </xs:sequence>
      <xs:attribute name="LastModified" type="xs:dateTime" use="optional"></xs:attribute>
    </xs:complexType>
  </xs:element>
  
  <xs:element name="UANodeSetChanges">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="NamespaceUris" type ="UriTable" minOccurs="0"></xs:element>
        <xs:element name="ServerUris" type ="UriTable" minOccurs="0"></xs:element>
        <xs:element name="Aliases" type ="AliasTable" minOccurs="0"></xs:element>
        <xs:element name="Extensions" type="ListOfExtensions" minOccurs="0"></xs:element>
        <xs:element name="NodesToAdd" type="NodesToAdd" minOccurs="0"></xs:element>
        <xs:element name="ReferencesToAdd" type="ReferencesToChange" minOccurs="0"></xs:element>
        <xs:element name="NodesToDelete" type="NodesToDelete" minOccurs="0"></xs:element>
        <xs:element name="ReferencesToDelete" type="ReferencesToChange" minOccurs="0"></xs:element>
      </xs:sequence>
      <xs:attribute name="LastModified" type="xs:dateTime" use="optional"></xs:attribute>
      <xs:attribute name="TransactionId" type="xs:string" use="required"></xs:attribute>
      <xs:attribute name="AcceptAllOrNothing" type="xs:boolean" default="false"></xs:attribute>
    </xs:complexType>
  </xs:element>

  <xs:element name="UANodeSetChangesStatus">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="NodesToAdd" type="NodeSetStatusList" minOccurs="0"></xs:element>
        <xs:element name="ReferencesToAdd" type="NodeSetStatusList" minOccurs="0"></xs:element>
        <xs:element name="NodesToDelete" type="NodeSetStatusList" minOccurs="0"></xs:element>
        <xs:element name="ReferencesToDelete" type="NodeSetStatusList" minOccurs="0"></xs:element>
      </xs:sequence>
      <xs:attribute name="LastModified" type="xs:dateTime" use="optional"></xs:attribute>
      <xs:attribute name="TransactionId" type="xs:string" use="required"></xs:attribute>
    </xs:complexType>
  </xs:element>
  
  <xs:complexType name="NodesToAdd">
    <xs:choice minOccurs="0" maxOccurs="unbounded">
      <xs:element name="UAObject" type="UAObject"></xs:element>
      <xs:element name="UAVariable" type="UAVariable"></xs:element>
      <xs:element name="UAMethod" type="UAMethod"></xs:element>
      <xs:element name="UAView" type="UAView"></xs:element>
      <xs:element name="UAObjectType" type="UAObjectType"></xs:element>
      <xs:element name="UAVariableType" type="UAVariableType"></xs:element>
      <xs:element name="UADataType" type="UADataType"></xs:element>
      <xs:element name="UAReferenceType" type="UAReferenceType"></xs:element>
    </xs:choice>
  </xs:complexType>

  <xs:complexType name="NodesToDelete">
    <xs:sequence>
      <xs:element name="Node" type="NodeToDelete" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
  </xs:complexType>
  
  <xs:complexType name="NodeToDelete">
    <xs:simpleContent>
      <xs:extension base="NodeId">
        <xs:attribute name="DeleteReverseReferences" type="xs:boolean" default="true"></xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:complexType name="ReferencesToChange">
    <xs:sequence>
      <xs:element name="Reference" type="ReferenceChange" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
  </xs:complexType>
  
  <xs:complexType name="ReferenceChange">
    <xs:simpleContent>
      <xs:extension base="NodeId">
        <xs:attribute name="Source" type="NodeId" use="required"></xs:attribute>
        <xs:attribute name="ReferenceType" type="NodeId" use="required"></xs:attribute>
        <xs:attribute name="IsForward" type="xs:boolean" default="true"></xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:complexType name="NodeSetStatus">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="Code" type="xs:unsignedInt" default="0"></xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:complexType name="NodeSetStatusList">
    <xs:sequence>
      <xs:element name="Status" type="NodeSetStatus" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
  </xs:complexType>
  
  <xs:complexType name="UriTable">
    <xs:sequence>
      <xs:element name="Uri" type="xs:string" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="ModelTableEntry">
    <xs:sequence>
      <xs:element name="RequiredModel" type="ModelTableEntry" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
    <xs:attribute name="ModelUri" type="xs:string" use="optional"></xs:attribute>
    <xs:attribute name="Version" type="xs:string" use="optional"></xs:attribute>
    <xs:attribute name="PublicationDate" type="xs:dateTime" use="optional"></xs:attribute>
  </xs:complexType>

  <xs:complexType name="ModelTable">
    <xs:sequence>
      <xs:element name="Model" type="ModelTableEntry" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:simpleType name="NodeId">
    <xs:restriction base="xs:string"></xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="QualifiedName">
    <xs:restriction base="xs:string"></xs:restriction>
  </xs:simpleType>

  <xs:complexType name="NodeIdAlias">
    <xs:simpleContent>
      <xs:extension base="NodeId">
        <xs:attribute name="Alias" type="xs:string"></xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:complexType name="AliasTable">
    <xs:sequence>
      <xs:element name="Alias" type="NodeIdAlias" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:simpleType name="Locale">
    <xs:restriction base="xs:string"></xs:restriction>
  </xs:simpleType>

  <xs:complexType name="LocalizedText">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="Locale" type="Locale" default=""></xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:simpleType name="WriteMask">
    <xs:restriction base="xs:unsignedInt"></xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="EventNotifier">
    <xs:restriction base="xs:unsignedByte"></xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="ValueRank">
    <xs:restriction base="xs:int"></xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="ArrayDimensions">
    <xs:list>
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:pattern value="([0-9]*,|[0-9]*)*"></xs:pattern>
        </xs:restriction>
      </xs:simpleType>
    </xs:list>
  </xs:simpleType>

  <xs:simpleType name="SymbolicName">
    <xs:list>
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:pattern value="(\p{L})(\p{L}|\p{N}|_)*"></xs:pattern>
        </xs:restriction>
      </xs:simpleType>
    </xs:list>
  </xs:simpleType>

  <xs:simpleType name="CardinalityType">
    <xs:list>
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:pattern value="(\p{N})*|unbounded"></xs:pattern>
        </xs:restriction>
      </xs:simpleType>
    </xs:list>
  </xs:simpleType>

  <xs:simpleType name="Duration">
    <xs:restriction base="xs:double"></xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="AccessLevel">
    <xs:restriction base="xs:unsignedByte"></xs:restriction>
  </xs:simpleType>

  <xs:complexType name="Reference">
    <xs:simpleContent>
      <xs:extension base="NodeId">
        <xs:attribute name="ReferenceType" type="NodeId" use="required"></xs:attribute>
        <xs:attribute name="IsForward" type="xs:boolean" default="true"></xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:complexType name="ListOfReferences">
    <xs:sequence>
      <xs:element name="Reference" type="Reference" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="ListOfExtensions">
    <xs:sequence>
      <xs:element name="Extension" minOccurs="0" maxOccurs="unbounded">
        <xs:complexType>
          <xs:sequence>
            <xs:any minOccurs="0" processContents="lax" />
          </xs:sequence>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="UANode">
    <xs:sequence>
      <xs:element name="DisplayName" type="LocalizedText" minOccurs="0" maxOccurs="unbounded"></xs:element>
      <xs:element name="Description" type="LocalizedText" minOccurs="0" maxOccurs="unbounded"></xs:element>
      <xs:element name="Category" type="xs:string" minOccurs="0" maxOccurs="unbounded"></xs:element>
      <xs:element name="Documentation" type="xs:string" minOccurs="0" maxOccurs="1"></xs:element>
      <xs:element name="References" type="ListOfReferences" minOccurs="0"></xs:element>
      <xs:element name="Extensions" type="ListOfExtensions" minOccurs="0"></xs:element>
    </xs:sequence>
    <xs:attribute name="NodeId" type="NodeId" use="required"></xs:attribute>
    <xs:attribute name="BrowseName" type="QualifiedName" use="required"></xs:attribute>
    <xs:attribute name="WriteMask" type="WriteMask" default="0"></xs:attribute>
    <xs:attribute name="UserWriteMask" type="WriteMask" default="0"></xs:attribute>
    <xs:attribute name="SymbolicName" type="SymbolicName" use="optional"></xs:attribute>
  </xs:complexType>

  <xs:complexType name="UAInstance">
    <xs:complexContent>
      <xs:extension base="UANode">
        <xs:attribute name="ParentNodeId" type="NodeId" use="optional"></xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="UAObject">
    <xs:complexContent>
      <xs:extension base="UAInstance">
        <xs:attribute name="EventNotifier" type="EventNotifier" default="0"></xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="UAVariable">
    <xs:complexContent>
      <xs:extension base="UAInstance">
        <xs:sequence>
          <xs:element name="Value" minOccurs="0">
            <xs:complexType>
              <xs:sequence>
                <xs:any minOccurs="0" processContents="lax" />
              </xs:sequence>
            </xs:complexType>
          </xs:element>
          <xs:element name="Translation" type="TranslationType" minOccurs="0" maxOccurs="unbounded"></xs:element>
        </xs:sequence>
        <xs:attribute name="DataType" type="NodeId" default="i=24"></xs:attribute>
        <xs:attribute name="ValueRank" type="ValueRank" default="-1"></xs:attribute>
        <xs:attribute name="ArrayDimensions" type="ArrayDimensions" default=""></xs:attribute>
        <xs:attribute name="AccessLevel" type="AccessLevel" default="1"></xs:attribute>
        <xs:attribute name="UserAccessLevel" type="AccessLevel" default="1"></xs:attribute>
        <xs:attribute name="MinimumSamplingInterval" type="Duration" default="0"></xs:attribute>
        <xs:attribute name="Historizing" type="xs:boolean" default="false"></xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="UAMethodArgument">
    <xs:sequence>
      <xs:element name="Name" type="xs:string" minOccurs="0" maxOccurs="1"></xs:element>
      <xs:element name="Description" type="LocalizedText" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
  </xs:complexType>
  
  <xs:complexType name="UAMethod">
    <xs:complexContent>
      <xs:extension base="UAInstance">
        <xs:sequence>
          <xs:element name="ArgumentDescription" type="UAMethodArgument" minOccurs="0" maxOccurs="unbounded"></xs:element>
        </xs:sequence>
        <xs:attribute name="Executable" type="xs:boolean" default="true"></xs:attribute>
        <xs:attribute name="UserExecutable" type="xs:boolean" default="true"></xs:attribute>
        <xs:attribute name="MethodDeclarationId" type="NodeId" use="optional"></xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="TranslationType">
    <xs:choice minOccurs="0">
      <xs:element name="Text" type="LocalizedText" minOccurs="0" maxOccurs="unbounded"></xs:element>
      <xs:element name="Field" type="StructureTranslationType" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:choice>
  </xs:complexType>

  <xs:complexType name="StructureTranslationType">
    <xs:sequence>
      <xs:element name="Text" type="LocalizedText" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
    <xs:attribute name="Name" type="xs:string" use="required"></xs:attribute>
  </xs:complexType>

  <xs:complexType name="UAView">
    <xs:complexContent>
      <xs:extension base="UAInstance">
        <xs:attribute name="ContainsNoLoops" type="xs:boolean" default="false"></xs:attribute>
        <xs:attribute name="EventNotifier" type="EventNotifier" default="0"></xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="UAType">
    <xs:complexContent>
      <xs:extension base="UANode">
        <xs:attribute name="IsAbstract" type="xs:boolean" default="false"></xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="UAObjectType">
    <xs:complexContent>
      <xs:extension base="UAType"></xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="UAVariableType">
    <xs:complexContent>
      <xs:extension base="UAType">
        <xs:sequence>
          <xs:element name="Value" minOccurs="0">
            <xs:complexType>
              <xs:sequence>
                <xs:any minOccurs="0" processContents="lax" />
              </xs:sequence>
            </xs:complexType>
          </xs:element>
        </xs:sequence>
        <xs:attribute name="DataType" type="NodeId" default="i=24"></xs:attribute>
        <xs:attribute name="ValueRank" type="ValueRank" default="-1"></xs:attribute>
        <xs:attribute name="ArrayDimensions" type="ArrayDimensions" default=""></xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="UADataType">
    <xs:complexContent>
      <xs:extension base="UAType">
        <xs:sequence>
          <xs:element name="Definition" type="DataTypeDefinition" minOccurs="0"></xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="DataTypeDefinition">
    <xs:sequence>
      <xs:element name="Field" type="DataTypeField" minOccurs="0" maxOccurs="unbounded"></xs:element>
    </xs:sequence>
    <xs:attribute name="Name" type="QualifiedName" use="required"></xs:attribute>
    <xs:attribute name="BaseType" type="QualifiedName" use="optional" default=""></xs:attribute>
    <xs:attribute name="SymbolicName" type="SymbolicName" use="optional" default=""></xs:attribute>
    <xs:attribute name="IsUnion" type="xs:boolean" use="optional" default="false"></xs:attribute>
  </xs:complexType>

  <xs:complexType name="DataTypeField">
    <xs:sequence>
      <xs:element name="DisplayName" type="LocalizedText" minOccurs="0" maxOccurs="unbounded"></xs:element>
      <xs:element name="Description" type="LocalizedText" minOccurs="0" maxOccurs="unbounded"></xs:element>
      <xs:element name="Definition" type="DataTypeDefinition" minOccurs="0"></xs:element>
    </xs:sequence>
    <xs:attribute name="Name" type="xs:string" use="required"></xs:attribute>
    <xs:attribute name="SymbolicName" type="SymbolicName" use="optional"></xs:attribute>
    <xs:attribute name="DataType" type="NodeId" default="i=24"></xs:attribute>
    <xs:attribute name="ValueRank" type="ValueRank" default="-1"></xs:attribute>
    <xs:attribute name="Value" type="xs:int" default="-1"></xs:attribute>
    <xs:attribute name="IsOptional" type="xs:boolean" use="optional" default="false"></xs:attribute>
  </xs:complexType>

  <xs:complexType name="UAReferenceType">
    <xs:complexContent>
      <xs:extension base="UAType">
        <xs:sequence>
          <xs:element name="InverseName" type="LocalizedText" minOccurs="0" maxOccurs="unbounded"></xs:element>
        </xs:sequence>
        <xs:attribute name="Symmetric" type="xs:boolean" default="false"></xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

</xs:schema>