<xs:schema
  targetNamespace="http://schemas.microsoft.com/win/2005/12/counters"
  elementFormDefault="qualified"
  xmlns:man="http://schemas.microsoft.com/win/2005/12/counters"
  xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:simpleType name="GUIDType">
    <xs:restriction base="xs:string">
      <xs:pattern value="\{[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}\}"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="HexInt32Type">
    <xs:annotation>
      <xs:documentation>Hex 1-8 digits in size</xs:documentation>
    </xs:annotation>
    <xs:restriction base="xs:string">
      <xs:pattern value="0[xX][0-9A-Fa-f]{1,8}"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="UInt32Type">
    <xs:annotation>
      <xs:documentation>Hex 1-8 digits in size or unsignedInt</xs:documentation>
    </xs:annotation>
    <xs:union memberTypes="xs:unsignedInt man:HexInt32Type"/>
  </xs:simpleType>

  <xs:simpleType name="CSymbolType">
    <xs:annotation>
      <xs:documentation>A Valid C Symbol or an empty string</xs:documentation>
    </xs:annotation>
    <xs:restriction base="xs:string">
      <xs:pattern value="()|([_a-zA-Z][_0-9a-zA-Z]*)"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:complexType name="struct">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="name" type="man:CSymbolType" use="required"/>
        <xs:attribute name="type" type="man:CSymbolType" use="required"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:complexType name="structs">
    <xs:choice minOccurs="1" maxOccurs="unbounded">
      <xs:element name="struct" type="man:struct"/>
    </xs:choice>
  </xs:complexType>
  
  <xs:complexType name="counterAttribute">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="name" use="required">
          <xs:simpleType>
            <xs:restriction base="xs:string">
              <xs:enumeration value="reference"/>
              <xs:enumeration value="noDisplay"/>
              <xs:enumeration value="noDigitGrouping"/>
              <xs:enumeration value="displayAsHex"/>
              <xs:enumeration value="displayAsReal"/>
            </xs:restriction>
          </xs:simpleType>
        </xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  
  <xs:complexType name="counterAttributes">
    <xs:choice minOccurs="1" maxOccurs="5">
      <xs:element name="counterAttribute" type="man:counterAttribute"/>
    </xs:choice>
  </xs:complexType>
  
  <xs:complexType name="counter">
    <xs:choice minOccurs="0" maxOccurs="1">
      <xs:element name="counterAttributes" type="man:counterAttributes">
        <xs:key name="uniqueCounterAttributeName">
          <xs:annotation>
            <xs:documentation>
              Only five counterAttribute elements allowed, they should all be unique.
            </xs:documentation>
          </xs:annotation>
          <xs:selector xpath="./man:counterAttribute"/>
          <xs:field xpath="@name"/>
        </xs:key>
      </xs:element>
    </xs:choice>
    <xs:attribute name="symbol" type="man:CSymbolType" use="optional"/>
    <xs:attribute name="id" type="man:UInt32Type" use="required"/>
    <xs:attribute name="uri" type="xs:anyURI" use="required"/>
    <xs:attribute name="name" use="optional">
      <xs:annotation>
        <xs:documentation>
            This attribute is required for schemaVersion >= 2.0.
        </xs:documentation>
      </xs:annotation>
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:maxLength value="1023"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="nameID" type="man:UInt32Type" use="optional">
      <xs:annotation>
        <xs:documentation>
            Resource ID of the name string. This attribute is required
            for schemaVersion >= 2.0. It is not allowed for older versions.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name="description" type="xs:string" use="optional">
      <xs:annotation>
        <xs:documentation>
            This attribute is required for schemaVersion >= 2.0.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name="descriptionID" type="man:UInt32Type" use="optional">
      <xs:annotation>
        <xs:documentation>
            Resource ID of the description string. This attribute is required
            for schemaVersion >= 2.0. It is not allowed for older versions.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name="type" use="required">
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:enumeration value="perf_counter_counter"/>
          <xs:enumeration value="perf_counter_timer"/>
          <xs:enumeration value="perf_counter_queuelen_type"/>
          <xs:enumeration value="perf_counter_large_queuelen_type"/>
          <xs:enumeration value="perf_counter_100ns_queuelen_type"/>
          <xs:enumeration value="perf_counter_obj_time_queuelen_type"/>
          <xs:enumeration value="perf_counter_bulk_count"/>
          <xs:enumeration value="perf_counter_text"/>
          <xs:enumeration value="perf_counter_rawcount"/>
          <xs:enumeration value="perf_counter_large_rawcount"/>
          <xs:enumeration value="perf_counter_rawcount_hex"/>
          <xs:enumeration value="perf_counter_large_rawcount_hex"/>
          <xs:enumeration value="perf_sample_fraction"/>
          <xs:enumeration value="perf_sample_counter"/>
          <xs:enumeration value="perf_counter_timer_inv"/>
          <xs:enumeration value="perf_sample_base"/>
          <xs:enumeration value="perf_average_timer"/>
          <xs:enumeration value="perf_average_base"/>
          <xs:enumeration value="perf_average_bulk"/>
          <xs:enumeration value="perf_obj_time_timer"/>
          <xs:enumeration value="perf_100nsec_timer"/>
          <xs:enumeration value="perf_100nsec_timer_inv"/>
          <xs:enumeration value="perf_counter_multi_timer"/>
          <xs:enumeration value="perf_counter_multi_timer_inv"/>
          <xs:enumeration value="perf_counter_multi_base"/>
          <xs:enumeration value="perf_100nsec_multi_timer"/>
          <xs:enumeration value="perf_100nsec_multi_timer_inv"/>
          <xs:enumeration value="perf_raw_fraction"/>
          <xs:enumeration value="perf_large_raw_fraction"/>
          <xs:enumeration value="perf_raw_base"/>
          <xs:enumeration value="perf_large_raw_base"/>
          <xs:enumeration value="perf_elapsed_time"/>
          <xs:enumeration value="perf_counter_delta"/>
          <xs:enumeration value="perf_counter_large_delta"/>
          <xs:enumeration value="perf_precision_system_timer"/>
          <xs:enumeration value="perf_precision_100ns_timer"/>
          <xs:enumeration value="perf_precision_object_timer"/>
          <xs:enumeration value="perf_counter_composite"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="baseID" type="man:UInt32Type" use="optional"/>
    <xs:attribute name="detailLevel" use="required">
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:enumeration value="standard"/>
          <xs:enumeration value="advanced"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="defaultScale" use="optional" default="0">
      <xs:simpleType>
        <xs:restriction base="xs:integer">
          <xs:minInclusive value="-10"/>
          <xs:maxInclusive value="10"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="aggregate" use="optional">
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:enumeration value="sum"/>
          <xs:enumeration value="avg"/>
          <xs:enumeration value="max"/>
          <xs:enumeration value="min"/>
          <xs:enumeration value="undefined"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="perfTimeID" type="man:UInt32Type" use="optional"/>
    <xs:attribute name="perfFreqID" type="man:UInt32Type" use="optional"/>
    <xs:attribute name="multiCounterID" type="man:UInt32Type" use="optional"/>
    <xs:attribute name="struct" type="man:CSymbolType" use="optional">
      <xs:annotation>
        <xs:documentation>
          If providerType=userMode, required.
          If providerType=kernelMode, not allowed.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name="field" type="man:CSymbolType" use="optional">
      <xs:annotation>
        <xs:documentation>
          If providerType=userMode, required.
          If providerType=kernelMode, not allowed.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:complexType>

  <xs:complexType name="counterSet">
    <xs:sequence>
      <xs:element name="structs" type="man:structs" minOccurs="0" maxOccurs="1">
        <xs:annotation>
          <xs:documentation>
            If providerType=userMode, required.
            If providerType=kernelMode, not allowed.
          </xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:element name="counter" type="man:counter" minOccurs="1" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="symbol" type="man:CSymbolType" use="required"/>
    <xs:attribute name="guid" type="man:GUIDType" use="required"/>
    <xs:attribute name="uri" type="xs:anyURI" use="required"/>
    <xs:attribute name="name" use="required">
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:maxLength value="1023"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="nameID" type="man:UInt32Type" use="optional">
      <xs:annotation>
        <xs:documentation>
            Resource ID of the name string. This attribute is required
            for schemaVersion >= 2.0, and not allowed for older versions.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name="description" use="required"/>
    <xs:attribute name="descriptionID" type="man:UInt32Type" use="optional">
      <xs:annotation>
        <xs:documentation>
            Resource ID of the description string. This attribute is required
            for schemaVersion >= 2.0, and not allowed for older versions.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name="instances" use="optional" default="single">
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:enumeration value="single"/>
          <xs:enumeration value="multiple"/>
          <xs:enumeration value="globalAggregate"/>
          <xs:enumeration value="multipleAggregate"/>
          <xs:enumeration value="globalAggregateHistory"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
  </xs:complexType>
  
  <xs:complexType name="provider">
    <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:element name="counterSet" type="man:counterSet"/>
    </xs:choice>
    <xs:attribute name="symbol" type="man:CSymbolType" use="optional">
      <xs:annotation>
        <xs:documentation>
          Provider Symbol is required for User Mode providers.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name="callback" use="optional" default="default">
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:enumeration value="custom"/>
          <xs:enumeration value="default"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="providerGuid" type="man:GUIDType" use="required"/>
    <xs:attribute name="applicationIdentity" type="xs:string" use="required"/>
    <xs:attribute name="providerType" use="optional" default="userMode">
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:enumeration value="userMode"/>
          <xs:enumeration value="kernelMode"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="providerName" type="xs:string" use="optional" default="Counters"/>
    <xs:attribute name="resourceBase" type="man:UInt32Type" use="optional">
      <xs:annotation>
        <xs:documentation>
            This attribute is not allowed for schemaVersion >= 2.0.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:complexType>
  
  <xs:complexType name="counters">
    <xs:choice minOccurs="1" maxOccurs="1">
      <xs:element name="provider" type="man:provider"/>
    </xs:choice>
    <xs:attribute name="schemaVersion" type="xs:string" use="required"/>
  </xs:complexType>
  
  <xs:element name="counters" type="man:counters">
    <xs:key name="uniqueCounterSetGUID">
      <xs:annotation>
        <xs:documentation>
          Counter Set GUID should be unique across the entire document. The
          counter set registration fails if the GUID is already registered.
          To update a counter set that is registered, you must first
          uninstall the counter set and register it again.
        </xs:documentation>
      </xs:annotation>
      <xs:selector xpath="./man:provider/man:counterSet"/>
      <xs:field xpath="@guid"/>
    </xs:key>
  </xs:element>
  
</xs:schema>