MTConnectError_1.4.xsd

<?xml version='1.0' encoding='UTF-8'?>
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<xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns='urn:mtconnect.org:MTConnectError:1.4' xmlns:mt='urn:mtconnect.org:MTConnectError:1.4' targetNamespace='urn:mtconnect.org:MTConnectError:1.4' elementFormDefault='qualified' attributeFormDefault='unqualified' xmlns:vc='http://www.w3.org/2007/XMLSchema-versioning' vc:minVersion='1.1'>
  <xs:element name='MTConnectError' type='MTConnectErrorType'>
    <xs:annotation>
      <xs:documentation>
        The root node for MTConnect
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='SenderType'>
    <xs:annotation>
      <xs:documentation>
        The sender of the message
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='CreationTimeType'>
    <xs:annotation>
      <xs:documentation>
        The date and time the document was created
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:dateTime'/>
  </xs:simpleType>
  <xs:simpleType name='SequenceType'>
    <xs:annotation>
      <xs:documentation>
        A sequence number
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'>
      <xs:minInclusive value='1'/>
      <xs:maxExclusive value='18446744073709551615'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='TestIndicatorType'>
    <xs:annotation>
      <xs:documentation>
        A debugging flag for testing.
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:boolean'/>
  </xs:simpleType>
  <xs:simpleType name='InstanceIdType'>
    <xs:annotation>
      <xs:documentation>
        The instance number of the agent, used for fault tolerance
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'>
      <xs:minInclusive value='1'/>
      <xs:maxExclusive value='18446744073709551615'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='BufferSizeType'>
    <xs:annotation>
      <xs:documentation>
        The size of the agents buffer
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'>
      <xs:minInclusive value='1'/>
      <xs:maxExclusive value='4294967295'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='TimestampType'>
    <xs:annotation>
      <xs:documentation>
        The time the sample was reported
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:dateTime'/>
  </xs:simpleType>
  <xs:simpleType name='OccurrenceTimeType'>
    <xs:annotation>
      <xs:documentation>
        The time a sample occurred
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:dateTime'/>
  </xs:simpleType>
  <xs:simpleType name='VersionType'>
    <xs:annotation>
      <xs:documentation>
        A version number
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:NMTOKEN'/>
  </xs:simpleType>
  <xs:simpleType name='NameType'>
    <xs:annotation>
      <xs:documentation>
        A short name for any element
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:NMTOKEN'/>
  </xs:simpleType>
  <xs:simpleType name='UuidType'>
    <xs:annotation>
      <xs:documentation>
        A universally unique id that uniquely identifies the element for
        it&apos;s entire life
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='SerialNumberAttrType'>
    <xs:annotation>
      <xs:documentation>
        A serial number for a piece of equipment
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='ItemSourceType'>
    <xs:annotation>
      <xs:documentation>
        The measurement source
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='RateType'>
    <xs:annotation>
      <xs:documentation>
        A sample rate in milliseconds per sample
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:float'/>
  </xs:simpleType>
  <xs:simpleType name='ComponentIdType'>
    <xs:annotation>
      <xs:documentation>
        The id of the component (maps to the id from probe)
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:ID'/>
  </xs:simpleType>
  <xs:simpleType name='IDType'>
    <xs:annotation>
      <xs:documentation>
        An identifier
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:ID'/>
  </xs:simpleType>
  <xs:simpleType name='SignificantDigitsValueType'>
    <xs:annotation>
      <xs:documentation>
        The number significant digits
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'/>
  </xs:simpleType>
  <xs:simpleType name='CompositionIdType'>
    <xs:annotation>
      <xs:documentation>
        The item&apos;s reference to the Device model composition
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:NMTOKEN'/>
  </xs:simpleType>
  <xs:simpleType name='AssetIdType'>
    <xs:annotation>
      <xs:documentation>
        The unique id of the asset
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='AssetAttrType'>
    <xs:annotation>
      <xs:documentation>
        An asset type
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='AssetBufferSizeType'>
    <xs:annotation>
      <xs:documentation>
        The maximum number of assets
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'>
      <xs:minInclusive value='1'/>
      <xs:maxExclusive value='4294967295'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='AssetCountAttrType'>
    <xs:annotation>
      <xs:documentation>
        The number of assets
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'>
      <xs:minInclusive value='0'/>
      <xs:maxExclusive value='4294967295'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DescriptionTextType'>
    <xs:annotation>
      <xs:documentation>
        A description
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='DataItemExtType'>
    <xs:annotation>
      <xs:documentation>
        An extension point for data item types
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:pattern value='[a-ln-z]:[A-Z_0-9]+'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemStatsExtType'>
    <xs:annotation>
      <xs:documentation>
        An extension point for data item statistics types
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:pattern value='[a-ln-z]:[A-Z_0-9]+'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemEnumTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        The types of measurements available
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ACCELERATION'/>
      <xs:enumeration value='ACCUMULATED_TIME'/>
      <xs:enumeration value='ANGULAR_ACCELERATION'/>
      <xs:enumeration value='ANGULAR_VELOCITY'/>
      <xs:enumeration value='AMPERAGE'/>
      <xs:enumeration value='ANGLE'/>
      <xs:enumeration value='AXIS_FEEDRATE'/>
      <xs:enumeration value='CLOCK_TIME'/>
      <xs:enumeration value='CONCENTRATION'/>
      <xs:enumeration value='CONDUCTIVITY'/>
      <xs:enumeration value='DISPLACEMENT'/>
      <xs:enumeration value='ELECTRICAL_ENERGY'/>
      <xs:enumeration value='EQUIPMENT_TIMER'/>
      <xs:enumeration value='FILL_LEVEL'/>
      <xs:enumeration value='FLOW'/>
      <xs:enumeration value='FREQUENCY'/>
      <xs:enumeration value='LENGTH'/>
      <xs:enumeration value='LINEAR_FORCE'/>
      <xs:enumeration value='LOAD'/>
      <xs:enumeration value='MASS'/>
      <xs:enumeration value='PATH_FEEDRATE'/>
      <xs:enumeration value='PATH_POSITION'/>
      <xs:enumeration value='PH'/>
      <xs:enumeration value='POSITION'/>
      <xs:enumeration value='POWER_FACTOR'/>
      <xs:enumeration value='PRESSURE'/>
      <xs:enumeration value='PROCESS_TIMER'/>
      <xs:enumeration value='RESISTANCE'/>
      <xs:enumeration value='ROTARY_VELOCITY'/>
      <xs:enumeration value='SOUND_LEVEL'/>
      <xs:enumeration value='SPINDLE_SPEED'/>
      <xs:enumeration value='STRAIN'/>
      <xs:enumeration value='TEMPERATURE'/>
      <xs:enumeration value='TENSION'/>
      <xs:enumeration value='TILT'/>
      <xs:enumeration value='TORQUE'/>
      <xs:enumeration value='VELOCITY'/>
      <xs:enumeration value='VISCOSITY'/>
      <xs:enumeration value='VOLTAGE'/>
      <xs:enumeration value='VOLT_AMPERE'/>
      <xs:enumeration value='VOLT_AMPERE_REACTIVE'/>
      <xs:enumeration value='WATTAGE'/>
      <xs:enumeration value='ACTIVE_AXES'/>
      <xs:enumeration value='ACTUATOR_STATE'/>
      <xs:enumeration value='ALARM'/>
      <xs:enumeration value='AVAILABILITY'/>
      <xs:enumeration value='AXIS_COUPLING'/>
      <xs:enumeration value='AXIS_FEEDRATE_OVERRIDE'/>
      <xs:enumeration value='AXIS_INTERLOCK'/>
      <xs:enumeration value='AXIS_STATE'/>
      <xs:enumeration value='BLOCK'/>
      <xs:enumeration value='BLOCK_COUNT'/>
      <xs:enumeration value='CHUCK_STATE'/>
      <xs:enumeration value='CODE'/>
      <xs:enumeration value='COMPOSITION_STATE'/>
      <xs:enumeration value='CONTROLLER_MODE'/>
      <xs:enumeration value='CONTROLLER_MODE_OVERRIDE'/>
      <xs:enumeration value='COUPLED_AXES'/>
      <xs:enumeration value='DIRECTION'/>
      <xs:enumeration value='DOOR_STATE'/>
      <xs:enumeration value='DRY_RUN'/>
      <xs:enumeration value='EMERGENCY_STOP'/>
      <xs:enumeration value='EQUIPMENT_MODE'/>
      <xs:enumeration value='EXECUTION'/>
      <xs:enumeration value='FUNCTIONAL_MODE'/>
      <xs:enumeration value='HARDNESS'/>
      <xs:enumeration value='LEVEL'/>
      <xs:enumeration value='LINE'/>
      <xs:enumeration value='LINE_LABEL'/>
      <xs:enumeration value='LINE_NUMBER'/>
      <xs:enumeration value='MATERIAL'/>
      <xs:enumeration value='MESSAGE'/>
      <xs:enumeration value='OPERATOR_ID'/>
      <xs:enumeration value='PALLET_ID'/>
      <xs:enumeration value='PART_ASSET_ID'/>
      <xs:enumeration value='PART_COUNT'/>
      <xs:enumeration value='PART_ID'/>
      <xs:enumeration value='PART_NUMBER'/>
      <xs:enumeration value='PATH_FEEDRATE_OVERRIDE'/>
      <xs:enumeration value='PATH_MODE'/>
      <xs:enumeration value='POWER_STATE'/>
      <xs:enumeration value='POWER_STATUS'/>
      <xs:enumeration value='PROGRAM'/>
      <xs:enumeration value='PROGRAM_COMMENT'/>
      <xs:enumeration value='PROGRAM_EDIT'/>
      <xs:enumeration value='PROGRAM_EDIT_NAME'/>
      <xs:enumeration value='PROGRAM_HEADER'/>
      <xs:enumeration value='ROTARY_MODE'/>
      <xs:enumeration value='ROTARY_VELOCITY_OVERRIDE'/>
      <xs:enumeration value='SERIAL_NUMBER'/>
      <xs:enumeration value='SPINDLE_INTERLOCK'/>
      <xs:enumeration value='TOOL_ASSET_ID'/>
      <xs:enumeration value='TOOL_ID'/>
      <xs:enumeration value='TOOL_NUMBER'/>
      <xs:enumeration value='TOOL_OFFSET'/>
      <xs:enumeration value='USER'/>
      <xs:enumeration value='WIRE'/>
      <xs:enumeration value='WORKHOLDING_ID'/>
      <xs:enumeration value='WORK_OFFSET'/>
      <xs:enumeration value='ACTUATOR'/>
      <xs:enumeration value='CHUCK_INTERLOCK'/>
      <xs:enumeration value='COMMUNICATIONS'/>
      <xs:enumeration value='DATA_RANGE'/>
      <xs:enumeration value='END_OF_BAR'/>
      <xs:enumeration value='HARDWARE'/>
      <xs:enumeration value='INTERFACE_STATE'/>
      <xs:enumeration value='LOGIC_PROGRAM'/>
      <xs:enumeration value='MOTION_PROGRAM'/>
      <xs:enumeration value='SYSTEM'/>
      <xs:enumeration value='ASSET_CHANGED'/>
      <xs:enumeration value='ASSET_REMOVED'/>
      <xs:enumeration value='AUXILIARY_END_OF_BAR'/>
      <xs:enumeration value='CLOSE_CHUCK'/>
      <xs:enumeration value='CLOSE_DOOR'/>
      <xs:enumeration value='INTERFACE_STATE'/>
      <xs:enumeration value='MACHINE_AXIS_LOCK'/>
      <xs:enumeration value='MANUAL_CHUCK_UNCLAMP_INTERLOCK'/>
      <xs:enumeration value='MATERIAL_CHANGE'/>
      <xs:enumeration value='MATERIAL_FEED'/>
      <xs:enumeration value='MATERIAL_LOAD'/>
      <xs:enumeration value='MATERIAL_RETRACT'/>
      <xs:enumeration value='MATERIAL_UNLOAD'/>
      <xs:enumeration value='OPEN_CHUCK'/>
      <xs:enumeration value='OPEN_DOOR'/>
      <xs:enumeration value='PART_CHANGE'/>
      <xs:enumeration value='RESET'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemEnumType'>
    <xs:annotation>
      <xs:documentation>
        The types of measurements available
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='DataItemEnumTypeEnum DataItemExtType'/>
  </xs:simpleType>
  <xs:simpleType name='DataItemSubEnumTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        The sub-types for a measurement
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ABSOLUTE'/>
      <xs:enumeration value='ACTUAL'/>
      <xs:enumeration value='ACTION'/>
      <xs:enumeration value='ALL'/>
      <xs:enumeration value='ALTERNATING'/>
      <xs:enumeration value='AUXILIARY'/>
      <xs:enumeration value='A_SCALE'/>
      <xs:enumeration value='BAD'/>
      <xs:enumeration value='BRINELL'/>
      <xs:enumeration value='B_SCALE'/>
      <xs:enumeration value='COMMANDED'/>
      <xs:enumeration value='CONTROL'/>
      <xs:enumeration value='C_SCALE'/>
      <xs:enumeration value='DELAY'/>
      <xs:enumeration value='DIRECT'/>
      <xs:enumeration value='DRY_RUN'/>
      <xs:enumeration value='DYNAMIC'/>
      <xs:enumeration value='D_SCALE'/>
      <xs:enumeration value='FIXTURE'/>
      <xs:enumeration value='GOOD'/>
      <xs:enumeration value='JOG'/>
      <xs:enumeration value='INCREMENTAL'/>
      <xs:enumeration value='KINETIC'/>
      <xs:enumeration value='LATERAL'/>
      <xs:enumeration value='LEEB'/>
      <xs:enumeration value='LENGTH'/>
      <xs:enumeration value='LINE'/>
      <xs:enumeration value='LINEAR'/>
      <xs:enumeration value='LOADED'/>
      <xs:enumeration value='MACHINE_AXIS_LOCK'/>
      <xs:enumeration value='MAINTENANCE'/>
      <xs:enumeration value='MANUAL_UNCLAMP'/>
      <xs:enumeration value='MAXIMUM'/>
      <xs:enumeration value='MINIMUM'/>
      <xs:enumeration value='MOHS'/>
      <xs:enumeration value='MOLE'/>
      <xs:enumeration value='MOTION'/>
      <xs:enumeration value='NO_SCALE'/>
      <xs:enumeration value='OPERATOR'/>
      <xs:enumeration value='OPERATING'/>
      <xs:enumeration value='OPTIONAL_STOP'/>
      <xs:enumeration value='TOOL_CHANGE_STOP'/>
      <xs:enumeration value='OVERRIDE'/>
      <xs:enumeration value='PRIMARY'/>
      <xs:enumeration value='PROBE'/>
      <xs:enumeration value='PROGRAMMED'/>
      <xs:enumeration value='POWERED'/>
      <xs:enumeration value='PROCESS'/>
      <xs:enumeration value='RADIAL'/>
      <xs:enumeration value='RAPID'/>
      <xs:enumeration value='RELATIVE'/>
      <xs:enumeration value='REMAINING'/>
      <xs:enumeration value='REQUEST'/>
      <xs:enumeration value='RESPONSE'/>
      <xs:enumeration value='ROCKWELL'/>
      <xs:enumeration value='ROTARY'/>
      <xs:enumeration value='SET_UP'/>
      <xs:enumeration value='SHORE'/>
      <xs:enumeration value='SINGLE_BLOCK'/>
      <xs:enumeration value='STANDARD'/>
      <xs:enumeration value='SWITCHED'/>
      <xs:enumeration value='TARGET'/>
      <xs:enumeration value='TOOL'/>
      <xs:enumeration value='USABLE'/>
      <xs:enumeration value='VERTICAL'/>
      <xs:enumeration value='VICKERS'/>
      <xs:enumeration value='VOLUME'/>
      <xs:enumeration value='WORKING'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemSubEnumType'>
    <xs:annotation>
      <xs:documentation>
        The sub-types for a measurement
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='DataItemSubEnumTypeEnum DataItemExtType'/>
  </xs:simpleType>
  <xs:simpleType name='DataItemStatisticsTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        Statistical operations on data
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='AVERAGE'/>
      <xs:enumeration value='KURTOSIS'/>
      <xs:enumeration value='MAXIMUM'/>
      <xs:enumeration value='MEDIAN'/>
      <xs:enumeration value='MODE'/>
      <xs:enumeration value='MINIMUM'/>
      <xs:enumeration value='RANGE'/>
      <xs:enumeration value='ROOT_MEAN_SQUARE'/>
      <xs:enumeration value='STANDARD_DEVIATION'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemStatisticsType'>
    <xs:annotation>
      <xs:documentation>
        Statistical operations on data
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='DataItemStatisticsTypeEnum DataItemStatsExtType'/>
  </xs:simpleType>
  <xs:simpleType name='UnitsExtType'>
    <xs:annotation>
      <xs:documentation>
        An extension point for data item types
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:pattern value='x:[A-Z_0-9]+'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='UnitsTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        The units supported
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='AMPERE'/>
      <xs:enumeration value='CELSIUS'/>
      <xs:enumeration value='COUNT'/>
      <xs:enumeration value='DECIBEL'/>
      <xs:enumeration value='DEGREE'/>
      <xs:enumeration value='DEGREE/SECOND'/>
      <xs:enumeration value='DEGREE/SECOND^2'/>
      <xs:enumeration value='HERTZ'/>
      <xs:enumeration value='JOULE'/>
      <xs:enumeration value='KILOGRAM'/>
      <xs:enumeration value='LITER'/>
      <xs:enumeration value='LITER/SECOND'/>
      <xs:enumeration value='MICRO_RADIAN'/>
      <xs:enumeration value='MILLIMETER'/>
      <xs:enumeration value='MILLIMETER/SECOND'/>
      <xs:enumeration value='MILLIMETER/SECOND^2'/>
      <xs:enumeration value='MILLIMETER_3D'/>
      <xs:enumeration value='NEWTON'/>
      <xs:enumeration value='NEWTON_METER'/>
      <xs:enumeration value='OHM'/>
      <xs:enumeration value='PASCAL'/>
      <xs:enumeration value='PASCAL_SECOND'/>
      <xs:enumeration value='PERCENT'/>
      <xs:enumeration value='PH'/>
      <xs:enumeration value='REVOLUTION/MINUTE'/>
      <xs:enumeration value='SECOND'/>
      <xs:enumeration value='SIEMENS/METER'/>
      <xs:enumeration value='SOUND_LEVEL'/>
      <xs:enumeration value='VOLT'/>
      <xs:enumeration value='VOLT_AMPERE'/>
      <xs:enumeration value='VOLT_AMPERE_REACTIVE'/>
      <xs:enumeration value='WATT'/>
      <xs:enumeration value='WATT_SECOND'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='UnitsType'>
    <xs:annotation>
      <xs:documentation>
        The units supported
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='UnitsTypeEnum UnitsExtType'/>
  </xs:simpleType>
  <xs:simpleType name='NativeUnitsTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        The units supported for the source equipment that can be converted into
        MTC Units.
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='AMPERE'/>
      <xs:enumeration value='CELSIUS'/>
      <xs:enumeration value='COUNT'/>
      <xs:enumeration value='DECIBEL'/>
      <xs:enumeration value='DEGREE'/>
      <xs:enumeration value='DEGREE/SECOND'/>
      <xs:enumeration value='DEGREE/SECOND^2'/>
      <xs:enumeration value='HERTZ'/>
      <xs:enumeration value='JOULE'/>
      <xs:enumeration value='KILOGRAM'/>
      <xs:enumeration value='LITER'/>
      <xs:enumeration value='LITER/SECOND'/>
      <xs:enumeration value='MICRO_RADIAN'/>
      <xs:enumeration value='MILLIMETER'/>
      <xs:enumeration value='MILLIMETER/SECOND'/>
      <xs:enumeration value='MILLIMETER/SECOND^2'/>
      <xs:enumeration value='MILLIMETER_3D'/>
      <xs:enumeration value='NEWTON'/>
      <xs:enumeration value='NEWTON_METER'/>
      <xs:enumeration value='OHM'/>
      <xs:enumeration value='PASCAL'/>
      <xs:enumeration value='PASCAL_SECOND'/>
      <xs:enumeration value='PERCENT'/>
      <xs:enumeration value='PH'/>
      <xs:enumeration value='REVOLUTION/MINUTE'/>
      <xs:enumeration value='SECOND'/>
      <xs:enumeration value='SIEMENS/METER'/>
      <xs:enumeration value='SOUND_LEVEL'/>
      <xs:enumeration value='VOLT'/>
      <xs:enumeration value='VOLT_AMPERE'/>
      <xs:enumeration value='VOLT_AMPERE_REACTIVE'/>
      <xs:enumeration value='WATT'/>
      <xs:enumeration value='WATT_SECOND'/>
      <xs:enumeration value='CENTIPOISE'/>
      <xs:enumeration value='DEGREE/MINUTE'/>
      <xs:enumeration value='FAHRENHEIT'/>
      <xs:enumeration value='FOOT'/>
      <xs:enumeration value='FOOT/MINUTE'/>
      <xs:enumeration value='FOOT/SECOND'/>
      <xs:enumeration value='FOOT/SECOND^2'/>
      <xs:enumeration value='FOOT_3D'/>
      <xs:enumeration value='GALLON/MINUTE'/>
      <xs:enumeration value='INCH'/>
      <xs:enumeration value='INCH/MINUTE'/>
      <xs:enumeration value='INCH/SECOND'/>
      <xs:enumeration value='INCH/SECOND^2'/>
      <xs:enumeration value='INCH_3D'/>
      <xs:enumeration value='KILOWATT'/>
      <xs:enumeration value='KILOWATT_HOUR'/>
      <xs:enumeration value='MILLIMETER/MINUTE'/>
      <xs:enumeration value='OTHER'/>
      <xs:enumeration value='POUND'/>
      <xs:enumeration value='POUND/INCH^2'/>
      <xs:enumeration value='RADIAN'/>
      <xs:enumeration value='RADIAN/MINUTE'/>
      <xs:enumeration value='RADIAN/SECOND'/>
      <xs:enumeration value='RADIAN/SECOND^2'/>
      <xs:enumeration value='REVOLUTION/SECOND'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='NativeUnitsType'>
    <xs:annotation>
      <xs:documentation>
        The units supported for the source equipment that can be converted into
        MTC Units.
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='NativeUnitsTypeEnum UnitsExtType'/>
  </xs:simpleType>
  <xs:simpleType name='CoordinateSystemType'>
    <xs:annotation>
      <xs:documentation>
        The coordinate system to be used for the position
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='MACHINE'/>
      <xs:enumeration value='WORK'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemResetValueExtType'>
    <xs:annotation>
      <xs:documentation>
        An extension point for reset types
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:pattern value='[a-ln-z]:[A-Z_0-9]+'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemResetValueTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        The reset intervals
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ACTION_COMPLETE'/>
      <xs:enumeration value='ANNUAL'/>
      <xs:enumeration value='DAY'/>
      <xs:enumeration value='LIFE'/>
      <xs:enumeration value='MAINTENANCE'/>
      <xs:enumeration value='MANUAL'/>
      <xs:enumeration value='MONTH'/>
      <xs:enumeration value='POWER_ON'/>
      <xs:enumeration value='SHIFT'/>
      <xs:enumeration value='WEEK'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemResetValueType'>
    <xs:annotation>
      <xs:documentation>
        The reset intervals
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='DataItemResetValueTypeEnum DataItemResetValueExtType'/>
  </xs:simpleType>
  <xs:complexType name='HeaderType'>
    <xs:annotation>
      <xs:documentation>
        Message header for protocol information
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='xs:string'>
        <xs:attribute name='version' type='VersionType' use='required'/>
        <xs:attribute name='creationTime' type='CreationTimeType' use='required'/>
        <xs:attribute name='testIndicator' type='TestIndicatorType' use='optional'/>
        <xs:attribute name='instanceId' type='InstanceIdType' use='required'/>
        <xs:attribute name='sender' type='SenderType' use='required'/>
        <xs:attribute name='bufferSize' type='BufferSizeType' use='required'/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name='MTConnectErrorType'>
    <xs:annotation>
      <xs:documentation>
        The root node for MTConnect
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name='Header' type='HeaderType'>
        <xs:annotation>
          <xs:documentation>
            Protocol dependent information
          </xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:choice minOccurs='1'>
        <xs:element name='Error' type='ErrorType'>
          <xs:annotation>
            <xs:documentation>
              Only for backward compatibility with 1.0
            </xs:documentation>
          </xs:annotation>
        </xs:element>
        <xs:element name='Errors' type='ErrorsType'>
          <xs:annotation>
            <xs:documentation>
              A collection of errors
            </xs:documentation>
          </xs:annotation>
        </xs:element>
      </xs:choice>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name='ErrorsType'>
    <xs:annotation>
      <xs:documentation>
        A collection of errors
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name='Error' type='ErrorType' minOccurs='1' maxOccurs='unbounded'>
        <xs:annotation>
          <xs:documentation>
            An error result
          </xs:documentation>
        </xs:annotation>
      </xs:element>
    </xs:sequence>
  </xs:complexType>
  <xs:simpleType name='ErrorDescriptionType'>
    <xs:annotation>
      <xs:documentation>
        The text description of the error
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='ErrorCodeType'>
    <xs:annotation>
      <xs:documentation>
        The error code
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='UNAUTHORIZED'/>
      <xs:enumeration value='NO_DEVICE'/>
      <xs:enumeration value='OUT_OF_RANGE'/>
      <xs:enumeration value='TOO_MANY'/>
      <xs:enumeration value='INVALID_URI'/>
      <xs:enumeration value='INVALID_REQUEST'/>
      <xs:enumeration value='INTERNAL_ERROR'/>
      <xs:enumeration value='INVALID_PATH'/>
      <xs:enumeration value='UNSUPPORTED'/>
      <xs:enumeration value='ASSET_NOT_FOUND'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='ErrorType'>
    <xs:annotation>
      <xs:documentation>
        An error description
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='ErrorDescriptionType'>
        <xs:attribute name='errorCode' type='ErrorCodeType' use='required'/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
</xs:schema>