<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified"
           xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
           xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
           xmlns:t="http://schemas.microsoft.com/appx/manifest/types"
           xmlns:f="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
           xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
           xmlns:uap3="http://schemas.microsoft.com/appx/manifest/uap/windows10/3"
           xmlns:uap4="http://schemas.microsoft.com/appx/manifest/uap/windows10/4"
           xmlns:uap5="http://schemas.microsoft.com/appx/manifest/uap/windows10/5"
           xmlns:uap6="http://schemas.microsoft.com/appx/manifest/uap/windows10/6"
           xmlns:uap7="http://schemas.microsoft.com/appx/manifest/uap/windows10/7"
           xmlns:uap8="http://schemas.microsoft.com/appx/manifest/uap/windows10/8"
           xmlns:uap10="http://schemas.microsoft.com/appx/manifest/uap/windows10/10"
           xmlns:wincap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/windowscapabilities"
           xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
           xmlns:rescap6="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities/6"
           xmlns:phone="http://schemas.microsoft.com/appx/2014/phone/manifest"
           xmlns:serverpreview="http://schemas.microsoft.com/appx/manifest/serverpreview/windows10"
           xmlns:desktop="http://schemas.microsoft.com/appx/manifest/desktop/windows10"
           xmlns:iot2="http://schemas.microsoft.com/appx/manifest/iot/windows10/2"
           xmlns:com="http://schemas.microsoft.com/appx/manifest/com/windows10"
           xmlns:com2="http://schemas.microsoft.com/appx/manifest/com/windows10/2"
           xmlns:desktop2="http://schemas.microsoft.com/appx/manifest/desktop/windows10/2"
           xmlns:desktop4="http://schemas.microsoft.com/appx/manifest/desktop/windows10/4"
           xmlns:desktop6="http://schemas.microsoft.com/appx/manifest/desktop/windows10/6"
           >

  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/types"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/uap/windows10"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/2014/phone/manifest"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/uap/windows10/4"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/uap/windows10/5"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/uap/windows10/6"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/uap/windows10/7"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/uap/windows10/8"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/uap/windows10/10"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/iot/windows10/2"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/desktop/windows10/4"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/desktop/windows10/6"/>
  <xs:import namespace="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities/6"/>
  
  <xs:element name="Package">
    <xs:complexType>
      <xs:all>
        <xs:element name="Identity" type="CT_Identity"/>
        <xs:element ref="phone:PhoneIdentity" minOccurs="0"/>
        <xs:element name="Properties" type="CT_Properties"/>
        <xs:element name="Resources" type="CT_Resources" minOccurs="0"/>
        <xs:element name="Dependencies" type="CT_Dependencies"/>
        <xs:element name="Capabilities" type="CT_Capabilities" minOccurs="0"/>
        <xs:element name="Extensions" type="CT_PackageExtensions" minOccurs="0"/>
        <xs:element name="Applications" type="CT_Applications" minOccurs="0"/>
        <xs:element ref="ComExtensions" minOccurs="0"/>
      </xs:all>
      <xs:attribute name="IgnorableNamespaces" type="t:ST_NonEmptyString" use="optional"/>
    </xs:complexType>
    <xs:unique name="Resource_Language">
      <xs:selector xpath="f:Resources/f:Resource"/>
      <xs:field xpath="@Language"/>
    </xs:unique>
    <xs:unique name="Resource_Scale">
      <xs:selector xpath="f:Resources/f:Resource"/>
      <xs:field xpath="@uap:Scale"/>
    </xs:unique>
    <xs:unique name="Resource_DXFeatureLevel">
      <xs:selector xpath="f:Resources/f:Resource"/>
      <xs:field xpath="@uap:DXFeatureLevel"/>
    </xs:unique>
    <xs:unique name="Application_Id">
      <xs:selector xpath="f:Applications/f:Application"/>
      <xs:field xpath="@Id"/>
    </xs:unique>
    <xs:unique name="Capability_Name">
      <xs:selector xpath="f:Capabilities/f:Capability | f:Capabilities/uap:Capability | f:Capabilities/wincap:Capability | f:Capabilities/rescap:Capability"/>
      <xs:field xpath="@Name"/>
    </xs:unique>
    <xs:unique name="DeviceCapability_Name">
      <xs:selector xpath="f:Capabilities/f:DeviceCapability"/>
      <xs:field xpath="@Name"/>
    </xs:unique>
    <xs:unique name="CustomCapability_Name">
      <xs:selector xpath="f:Capabilities/uap4:CustomCapability"/>
      <xs:field xpath="@Name"/>
    </xs:unique>
    <xs:unique name="Extension_FileType_Name">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/uap:Extension/uap:FileTypeAssociation"/>
      <xs:field xpath="@Name"/>
    </xs:unique>
    <xs:unique name="Extension_FileType">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/uap:Extension/uap:FileTypeAssociation/uap:SupportedFileTypes/uap:FileType | f:Applications/f:Application/f:Extensions/uap:Extension/uap:FileTypeAssociation/uap:SupportedFileTypes/uap10:FileType"/>
      <xs:field xpath="."/>
    </xs:unique>
    <xs:unique name="Extension_Protocol">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/uap:Extension/uap:Protocol"/>
      <xs:field xpath="@Name"/>
    </xs:unique>
    <xs:unique name="Extension_DialProtocol">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/uap:Extension/uap:DialProtocol"/>
      <xs:field xpath="@Name"/>
    </xs:unique>
    <xs:unique name="Extension_StartupTask">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/desktop:Extension/desktop:StartupTask"/>
      <xs:field xpath="@TaskId"/>
    </xs:unique>
    <xs:unique name="Extension_AppExecutionAlias">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/uap3:Extension/uap3:AppExecutionAlias/desktop:ExecutionAlias | f:Applications/f:Application/f:Extensions/uap3:Extension/uap3:AppExecutionAlias/uap8:ExecutionAlias | f:Applications/f:Application/f:Extensions/uap5:Extension/uap5:AppExecutionAlias/uap5:ExecutionAlias |
      f:Applications/f:Application/f:Extensions/uap5:Extension/uap5:AppExecutionAlias/uap8:ExecutionAlias"/>
      <xs:field xpath="@Alias"/>
    </xs:unique>
    <xs:unique name="Class_Id">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/com:Extension/com:ComServer/com:ExeServer/com:Class | f:Applications/f:Application/f:Extensions/com:Extension/com:ComServer/com:SurrogateServer/com:Class | f:Applications/f:Application/f:Extensions/com:Extension/com:ComServer/com:TreatAsClass | f:Applications/f:Application/f:Extensions/com:Extension/com:ComInterface/com:ProxyStub | f:Extensions/com:Extension/com:ComInterface/com:ProxyStub | f:Applications/f:Application/f:Extensions/com2:Extension/com2:ComServer/com:ExeServer/com:Class | f:Applications/f:Application/f:Extensions/com2:Extension/com2:ComServer/com:SurrogateServer/com:Class | f:Applications/f:Application/f:Extensions/com2:Extension/com2:ComServer/com:TreatAsClass | f:Applications/f:Application/f:Extensions/com2:Extension/com2:ComInterface/com:ProxyStub | f:Extensions/com2:Extension/com2:ComInterface/com:ProxyStub"/>
      <xs:field xpath="@Id"/>
    </xs:unique>
    <xs:unique name="ProgId_Id">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/com:Extension/com:ComServer/com:ProgId | f:Applications/f:Application/f:Extensions/com2:Extension/com2:ComServer/com:ProgId"/>
      <xs:field xpath="@Id"/>
    </xs:unique>
    <xs:unique name="Interface_Id">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/com:Extension/com:ComInterface/com:Interface | f:Extensions/com:Extension/com:ComInterface/com:Interface | f:Applications/f:Application/f:Extensions/com2:Extension/com2:ComInterface/com:Interface | f:Extensions/com2:Extension/com2:ComInterface/com:Interface"/>
      <xs:field xpath="@Id"/>
    </xs:unique>
    <xs:unique name="TypeLib_Id">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/com:Extension/com:ComInterface/com:TypeLib | f:Extensions/com:Extension/com:ComInterface/com:TypeLib | f:Applications/f:Application/f:Extensions/com2:Extension/com2:ComInterface/com:TypeLib | f:Extensions/com2:Extension/com2:ComInterface/com:TypeLib"/>
      <xs:field xpath="@Id"/>
    </xs:unique>
    <xs:unique name="SurrogateServer_AppId">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/com:Extension/com:ComServer/com:SurrogateServer | f:Applications/f:Application/f:Extensions/com2:Extension/com2:ComServer/com:SurrogateServer"/>
      <xs:field xpath="@AppId"/>
    </xs:unique>
    <xs:unique name="Extension_AppUriHandlerName">
      <xs:selector xpath="f:Applications/f:Application/f:Extensions/uap3:Extension/uap3:AppUriHandler"/>
      <xs:field xpath="@uap7:Name"/>
    </xs:unique>
  </xs:element>

  <xs:element name="ComExtensions" abstract="true"/>

  <xs:complexType name="CT_Identity">
    <xs:attribute name="Name" type="t:ST_PackageName" use="required"/>
    <xs:attribute name="ProcessorArchitecture" type="t:ST_Architecture_v2" use="optional"/>
    <xs:attribute name="Publisher" type="t:ST_Publisher_2010_v2" use="required"/>
    <xs:attribute name="Version" type="t:ST_VersionQuad" use="required"/>
    <xs:attribute name="ResourceId" type="t:ST_ResourceId" use="optional"/>
  </xs:complexType>

  <xs:complexType name="CT_Properties">
    <xs:all>
      <xs:element name="Framework" type="xs:boolean" minOccurs="0"/>
      <xs:element name="DisplayName" type="t:ST_DisplayName"/>
      <xs:element name="PublisherDisplayName" type="t:ST_DisplayName"/>
      <xs:element name="Description" type="t:ST_Description" minOccurs="0"/>
      <xs:element name="Logo" type="t:ST_ImageFile"/>
      <xs:element name="ResourcePackage" type="xs:boolean" minOccurs="0"/>
      <xs:element ref="uap:SupportedUsers" minOccurs="0"/>
      <xs:element ref="uap6:AllowExecution" minOccurs="0"/>
      <xs:element ref="desktop6:RegistryWriteVirtualization" minOccurs="0"/>
      <xs:element ref="desktop6:FileSystemWriteVirtualization" minOccurs="0"/>
      <xs:element ref="rescap6:ModificationPackage" minOccurs="0"/>
      <xs:element ref="uap10:AllowExternalContent" minOccurs="0"/>
      <xs:element ref="uap10:PackageIntegrity" minOccurs="0"/>
    </xs:all>
  </xs:complexType>

  <xs:complexType name="CT_Resources">
    <xs:sequence>
      <xs:element name="Resource" minOccurs="0" maxOccurs="200">
        <xs:complexType>
          <xs:attribute name="Language" type="xs:language" use="optional"/>
          <xs:attribute ref="uap:Scale" use="optional"/>
          <xs:attribute ref="uap:DXFeatureLevel" use="optional"/>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="CT_Dependencies">
    <xs:sequence>
      <xs:element name="TargetDeviceFamily" maxOccurs="128">
        <xs:complexType>
          <xs:attribute name="Name" type="t:ST_AsciiIdentifier" use="required"/>
          <xs:attribute name="MinVersion" type="t:ST_VersionQuad" use="required"/>
          <xs:attribute name="MaxVersionTested" type="t:ST_VersionQuad" use="required"/>
        </xs:complexType>
      </xs:element>
      <xs:element name="PackageDependency" minOccurs="0" maxOccurs="128">
        <xs:complexType>
          <xs:attribute name="Name" type="t:ST_PackageName" use="required"/>
          <xs:attribute name="Publisher" type="t:ST_Publisher_2010_v2" use="required"/>
          <xs:attribute name="MinVersion" type="t:ST_VersionQuad" use="required"/>
          <xs:attribute name="MaxMajorVersionTested" type="xs:unsignedShort" use="optional"/>
          <xs:attribute ref="uap6:Optional" use="optional"/>
        </xs:complexType>
      </xs:element>
      <xs:element ref="MainPackageDependencyChoice" minOccurs="0" maxOccurs="1"/>
      <xs:element ref="MainPackageDependencyChoice2" minOccurs="0" maxOccurs="1000"/>
      <xs:element ref="uap5:DriverDependency" minOccurs="0" maxOccurs="1000"/>
      <xs:element ref="uap7:OSPackageDependency" minOccurs="0" maxOccurs="1000"/>
      <xs:element ref="uap10:HostRuntimeDependency" minOccurs="0" maxOccurs="1"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="MainPackageDependencyChoice" abstract="true"/>
  <xs:element name="MainPackageDependencyChoice2" abstract="true"/>

  <xs:complexType name="CT_Capabilities">
    <xs:sequence>
      <xs:element ref="CapabilityChoice" minOccurs="0" maxOccurs="100"/>
      <xs:element ref="CustomCapabilityChoice" minOccurs="0" maxOccurs="1000"/>
      <xs:element ref="DeviceCapability" minOccurs="0" maxOccurs="1000"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="CapabilityChoice" abstract="true"/>
  <xs:element name="Capability" substitutionGroup="CapabilityChoice">
    <xs:complexType>
      <xs:attribute name="Name" type="t:ST_Capability_Foundation" use="required"/>
    </xs:complexType>
  </xs:element>

  <xs:element name="CustomCapabilityChoice" abstract="true"/>
  
  <xs:element name="DeviceCapability">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="Device" type="CT_Device" minOccurs="0" maxOccurs="100"/>
        <xs:element ref="AdditionalDeviceChoice" minOccurs="0" maxOccurs="10000"/>
      </xs:sequence>
      <xs:attribute name="Name" type="t:ST_DeviceCapability" use="required"/>
    </xs:complexType>
  </xs:element>

  <xs:element name="AdditionalDeviceChoice" abstract="true"/>

  <xs:complexType name="CT_Device">
    <xs:sequence>
      <xs:element name="Function" maxOccurs="100">
        <xs:complexType>
          <xs:attribute name="Type" type="t:ST_DeviceFunction_Foundation" use="required"/>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
    <xs:attribute name="Id" type="t:ST_DeviceId" use="required"/>
  </xs:complexType>

  <xs:complexType name="CT_PackageExtensions">
    <xs:choice minOccurs="0" maxOccurs="10000">
      <xs:element name="Extension" maxOccurs="10000">
        <xs:complexType>
          <xs:choice>
            <xs:element name="InProcessServer" type="CT_InProcessServer"/>
            <xs:element name="OutOfProcessServer" type="CT_OutOfProcessServer"/>
            <xs:element name="ProxyStub" type="CT_ProxyStub"/>
            <xs:element name="Certificates" type="CT_Certificates"/>
            <xs:element name="PublisherCacheFolders" type="CT_PublisherCacheFolders"/>
          </xs:choice>
          <xs:attribute name="Category" type="t:ST_PackageExtensionCategory_Foundation" use="required"/>
          <xs:attributeGroup ref="uap10:TrustLevelGroup"/>
        </xs:complexType>
      </xs:element>
      <xs:element ref="ExtensionChoice"/>
    </xs:choice>
  </xs:complexType>
  
  <xs:complexType name="CT_InProcessServer">
    <xs:sequence>
      <xs:element name="Path" type="t:ST_FileName"/>
      <xs:element name="ActivatableClass" type="CT_InProcessActivatableClass" maxOccurs="65535"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="CT_InProcessActivatableClass">
    <xs:sequence>
      <xs:element name="ActivatableClassAttribute" type="t:CT_ActivatableClassAttribute" minOccurs="0" maxOccurs="1000"/>
    </xs:sequence>
    <xs:attribute name="ActivatableClassId" type="t:ST_ActivatableClassId" use="required"/>
    <xs:attribute name="ThreadingModel" type="t:ST_ThreadingModel" use="required"/>
  </xs:complexType>

  <xs:complexType name="CT_OutOfProcessServer">
    <xs:sequence>
      <xs:element name="Path" type="t:ST_ExecutableAnyCase"/>
      <xs:element name="Arguments" type="t:ST_NonEmptyString" minOccurs="0"/>
      <xs:element name="Instancing" type="t:ST_Instancing"/>
      <xs:element name="ActivatableClass" type="CT_OutOfProcessActivatableClass" maxOccurs="65535"/>
    </xs:sequence>
    <xs:attribute name="ServerName" type="t:ST_AsciiWindowsId" use="required"/>
    <xs:attributeGroup ref="uap5:OutOfProcessServerFullTrustAttributes"/>
  </xs:complexType>

  <xs:complexType name="CT_OutOfProcessActivatableClass">
    <xs:sequence>
      <xs:element name="ActivatableClassAttribute" type="t:CT_ActivatableClassAttribute" minOccurs="0" maxOccurs="1000"/>
    </xs:sequence>
    <xs:attribute name="ActivatableClassId" type="t:ST_ActivatableClassId" use="required"/>
  </xs:complexType>

  <xs:complexType name="CT_ProxyStub">
    <xs:sequence>
      <xs:element name="Path" type="t:ST_FileName" />
      <xs:element name="Interface" type="t:CT_Interface_Foundation" maxOccurs="65535"/>
    </xs:sequence>
    <xs:attribute name="ClassId" type="t:ST_GUID" use="required"/>
  </xs:complexType>

  <xs:complexType name="CT_Certificates">
    <xs:sequence>
      <xs:element name="Certificate" type="t:CT_CertificateContent" minOccurs="0" maxOccurs="100"/>
      <xs:element name="TrustFlags" type="t:CT_CertificateTrustFlags" minOccurs="0"/>
      <xs:element name="SelectionCriteria" type="t:CT_CertificateSelectionCriteria" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="CT_PublisherCacheFolders">
    <xs:sequence>
      <xs:element name="Folder" minOccurs="1" maxOccurs="100">
        <xs:complexType>
          <xs:attribute name="Name" type="t:ST_FileNameSegment" use="required"/>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="CT_Applications">
    <xs:sequence>
      <xs:element name="Application" maxOccurs="100">
        <xs:complexType>
          <xs:all>
            <xs:element ref="VisualElementsChoice"/>
            <xs:element ref="uap:ApplicationContentUriRules" minOccurs="0"/>
            <xs:element name="Extensions" type="CT_ApplicationExtensions" minOccurs="0"/>
            <xs:element ref="uap7:Properties" minOccurs="0"/>
          </xs:all>
          <xs:attribute name="Id" type="t:ST_ApplicationId" use="required"/>
          <xs:attribute name="Executable" type="t:ST_ExecutableAnyCase" use="optional"/>
          <xs:attribute name="EntryPoint" type="t:ST_EntryPoint" use="optional"/>
          <xs:attribute name="StartPage" type="t:ST_ApplicationStartPage" use="optional"/>
          <xs:attribute name="ResourceGroup" type="t:ST_AsciiWindowsId" use="optional"/>
          <xs:attribute ref="desktop4:Subsystem" use="optional"/>
          <xs:attribute ref="iot2:Subsystem" use="optional"/>
          <xs:attribute ref="uap10:Subsystem" use="optional"/>
          <xs:attribute ref="desktop4:SupportsMultipleInstances" use="optional"/>
          <xs:attribute ref="iot2:SupportsMultipleInstances" use="optional"/>
          <xs:attribute ref="uap10:SupportsMultipleInstances" use="optional"/>
          <xs:attributeGroup ref="uap10:TrustLevelGroup"/>
        </xs:complexType>
        <xs:unique name="ApplicationContentUrisRule_Match">
          <xs:selector xpath="uap:ApplicationContentUriRules/uap:Rule"/>
          <xs:field xpath="@Match"/>
        </xs:unique>
        <xs:unique name="ShareTarget_FileType">
          <xs:selector xpath="f:Extensions/uap:Extension/uap:ShareTarget/uap:SupportedFileTypes/uap:FileType"/>
          <xs:field xpath="."/>
        </xs:unique>
        <xs:unique name="ShareTarget_DataFormat">
          <xs:selector xpath="f:Extensions/uap:Extension/uap:ShareTarget/uap:DataFormat"/>
          <xs:field xpath="."/>
        </xs:unique>
        <xs:unique name="FileOpenPicker_FileType">
          <xs:selector xpath="f:Extensions/uap:Extension/uap:FileOpenPicker/uap:SupportedFileTypes/uap:FileType"/>
          <xs:field xpath="."/>
        </xs:unique>
        <xs:unique name="FileSavePicker_FileType">
          <xs:selector xpath="f:Extensions/uap:Extension/uap:FileSavePicker/uap:SupportedFileTypes/uap:FileType"/>
          <xs:field xpath="."/>
        </xs:unique>
        <xs:unique name="AutoPlay_ContentVerb">
          <xs:selector xpath="f:Extensions/uap:Extension/uap:AutoPlayContent/uap:LaunchAction"/>
          <xs:field xpath="@Verb"/>
        </xs:unique>
        <xs:unique name="AutoPlay_DeviceVerb">
          <xs:selector xpath="f:Extensions/uap:Extension/uap:AutoPlayDevice/uap:LaunchAction"/>
          <xs:field xpath="@Verb"/>
        </xs:unique>
        <xs:unique name="MediaCodec_AppServiceName">
          <xs:selector xpath="f:Extensions/uap4:Extension/uap4:MediaCodec"/>
          <xs:field xpath="@AppServiceName"/>
        </xs:unique>
        <xs:key name="ComServer_Class_IdKey">
          <xs:selector xpath="f:Extensions/com:Extension/com:ComServer/com:SurrogateServer/com:Class | f:Extensions/com:Extension/com:ComServer/com:ExeServer/com:Class | f:Extensions/com:Extension/com:ComServer/com:TreatAsClass | f:Extensions/com2:Extension/com2:ComServer/com:SurrogateServer/com:Class | f:Extensions/com2:Extension/com2:ComServer/com:ExeServer/com:Class | f:Extensions/com2:Extension/com2:ComServer/com:TreatAsClass"/>
          <xs:field xpath="@Id"/>
        </xs:key>
        <xs:key name="ComServer_SurrogateServer_Class_IdKey">
          <xs:selector xpath="f:Extensions/com:Extension/com:ComServer/com:SurrogateServer/com:Class | f:Extensions/com2:Extension/com2:ComServer/com:SurrogateServer/com:Class"/>
          <xs:field xpath="@Id"/>
        </xs:key>
        <xs:keyref name="ThumbnailHandlerRef" refer="ComServer_SurrogateServer_Class_IdKey">
          <xs:selector xpath="f:Extensions/uap:Extension/uap:FileTypeAssociation/desktop2:ThumbnailHandler | f:Extensions/uap:Extension/uap3:FileTypeAssociation/desktop2:ThumbnailHandler | f:Extensions/uap3:Extension/uap3:FileTypeAssociation/desktop2:ThumbnailHandler"/>
          <xs:field xpath="@Clsid"/>
        </xs:keyref>
        <xs:keyref name="DesktopPreviewHandlerRef" refer="ComServer_Class_IdKey">
          <xs:selector xpath="f:Extensions/uap:Extension/uap:FileTypeAssociation/desktop2:DesktopPreviewHandler | f:Extensions/uap:Extension/uap3:FileTypeAssociation/desktop2:DesktopPreviewHandler | f:Extensions/uap3:Extension/uap3:FileTypeAssociation/desktop2:DesktopPreviewHandler"/>
          <xs:field xpath="@Clsid"/>
        </xs:keyref>
        <xs:keyref name="DesktopPropertyHandlerRef" refer="ComServer_SurrogateServer_Class_IdKey">
          <xs:selector xpath="f:Extensions/uap:Extension/uap:FileTypeAssociation/desktop2:DesktopPropertyHandler | f:Extensions/uap:Extension/uap3:FileTypeAssociation/desktop2:DesktopPropertyHandler | f:Extensions/uap3:Extension/uap3:FileTypeAssociation/desktop2:DesktopPropertyHandler"/>
          <xs:field xpath="@Clsid"/>
        </xs:keyref>
        <xs:keyref name="OleClassRef" refer="ComServer_Class_IdKey">
          <xs:selector xpath="f:Extensions/uap:Extension/uap:FileTypeAssociation/desktop2:OleClass | f:Extensions/uap:Extension/uap3:FileTypeAssociation/desktop2:OleClass | f:Extensions/uap3:Extension/uap3:FileTypeAssociation/desktop2:OleClass"/>
          <xs:field xpath="@Clsid"/>
        </xs:keyref>
      </xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="VisualElementsChoice" abstract="true"/>
  
  <xs:complexType name="CT_ApplicationExtensions">
    <xs:choice minOccurs="0" maxOccurs="10000">
      <xs:element ref="ApplicationExtensionChoice"/>
      <xs:element ref="ExtensionChoice"/>
    </xs:choice>
  </xs:complexType>

  <xs:element name="ExtensionChoice" abstract="true"/>
  <xs:element name="ApplicationExtensionChoice" abstract="true"/>
  <xs:element name="Extension" substitutionGroup="ApplicationExtensionChoice">
    <xs:complexType>
      <xs:choice minOccurs="0">
        <xs:element name="BackgroundTasks" type="CT_BackgroundTasks"/>
      </xs:choice>
      <xs:attribute name="Category" type="t:ST_ApplicationExtensionCategory_Foundation" use="required"/>
      <xs:attributeGroup ref="t:ExtensionBaseAttributes"/>
      <xs:attributeGroup ref="uap10:TrustLevelGroup"/>
    </xs:complexType>
    <xs:unique name="BackgroundTasks_Type">
      <xs:selector xpath="f:BackgroundTasks/f:Task | f:BackgroundTasks/uap:Task"/>
      <xs:field xpath="@Type"/>
    </xs:unique>
  </xs:element>

  <xs:complexType name="CT_BackgroundTasks">
    <xs:sequence>
      <xs:element ref="BackgroundTaskChoice" minOccurs="0" maxOccurs="17"/>
    </xs:sequence>
    <xs:attribute name="ServerName" type="t:ST_AsciiWindowsId" use="optional"/>
    <xs:attribute ref="uap4:SupportsMultipleInstances" use="optional"/>
  </xs:complexType>

  <xs:element name="BackgroundTaskChoice" abstract="true"/>
  <xs:element name="Task" substitutionGroup="BackgroundTaskChoice">
    <xs:complexType>
      <xs:attribute name="Type" type="t:ST_BackgroundTasks_Foundation" use="required"/>
    </xs:complexType>
  </xs:element>

</xs:schema>