MTConnectError_1.7_1.0.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:1.7" xmlns:mt="urn:mtconnect.org:MTConnectError:1.7" targetNamespace="urn:mtconnect.org:MTConnectError:1.7" elementFormDefault="qualified" attributeFormDefault="unqualified">
	<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:string"/>
	</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:IDREF"/>
	</xs:simpleType>
	<xs:simpleType name="DurationTimeType">
		<xs:annotation>
			<xs:documentation>
        A length of time in seconds
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:float"/>
	</xs:simpleType>
	<xs:simpleType name="RemovedType">
		<xs:annotation>
			<xs:documentation>
        A flag indicating the item has been removed
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:boolean"/>
	</xs:simpleType>
	<xs:simpleType name="KeyType">
		<xs:annotation>
			<xs:documentation>
        The key for adata set
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:NMTOKEN"/>
	</xs:simpleType>
	<xs:simpleType name="DeviceModelChangeTimeType">
		<xs:annotation>
			<xs:documentation>
        A timestamp in 8601 format of the last update of the Device information
        for any device
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:dateTime"/>
	</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="AssetAttrTypeType">
		<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="FloatListValueType">
		<xs:annotation>
			<xs:documentation>
        Common floating point sample value
      </xs:documentation>
		</xs:annotation>
		<xs:list>
			<xs:simpleType>
				<xs:restriction base="xs:float"/>
			</xs:simpleType>
		</xs:list>
	</xs:simpleType>
	<xs:simpleType name="ThreeSpaceValueType">
		<xs:annotation>
			<xs:documentation>
        A three dimensional value &apos;X Y Z&apos; or &apos;A B C&apos;
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="FloatListValueType">
			<xs:maxLength value="3"/>
			<xs:minLength value="3"/>
		</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="DataItemEnumExtType">
		<xs:annotation>
			<xs:documentation>
        Extended tyoe for The types of measurements available
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:pattern value="[a-ln-z][a-z]+:[A-Z_0-9]+"/>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="DataItemEnumEnum">
		<xs:annotation>
			<xs:documentation>
        The types of measurements available
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:enumeration value="ACCELERATION">
				<xs:annotation>
					<xs:documentation>
            The measurement of the rate of change of velocity.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ACCUMULATED_TIME">
				<xs:annotation>
					<xs:documentation>
            The measurement of accumulated time for an activity or event.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="AMPERAGE">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in *Version 1.6*. Replaced by `AMPERAGE_AC` and
            `AMPERAGE_DC`. The measurement of electrical current.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ANGLE">
				<xs:annotation>
					<xs:documentation>
            The measurement of angular position.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ANGULAR_ACCELERATION">
				<xs:annotation>
					<xs:documentation>
            The measurement rate of change of angular velocity.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ANGULAR_VELOCITY">
				<xs:annotation>
					<xs:documentation>
            The measurement of the rate of change of angular position.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="AXIS_FEEDRATE">
				<xs:annotation>
					<xs:documentation>
            The measurement of the feedrate of a linear axis.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CAPACITY_FLUID">
				<xs:annotation>
					<xs:documentation>
            The fluid capacity of an object or container.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CAPACITY_SPATIAL">
				<xs:annotation>
					<xs:documentation>
            The geometric capacity of an object or container.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CLOCK_TIME">
				<xs:annotation>
					<xs:documentation>
            The value provided by a timing device at a specific point in time.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CONCENTRATION">
				<xs:annotation>
					<xs:documentation>
            The measurement of the percentage of one component within a mixture
            of components
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CONDUCTIVITY">
				<xs:annotation>
					<xs:documentation>
            The measurement of the ability of a material to conduct electricity.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CUTTING_SPEED">
				<xs:annotation>
					<xs:documentation>
            The speed difference (relative velocity) between the cutting
            mechanism and the surface of the workpiece it is operating on.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DENSITY">
				<xs:annotation>
					<xs:documentation>
            The volumetric mass of a material per unit volume of that material.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEPOSITION_ACCELERATION_VOLUMETRIC">
				<xs:annotation>
					<xs:documentation>
            The rate of change in spatial volume of material deposited in an
            additive manufacturing process.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEPOSITION_DENSITY">
				<xs:annotation>
					<xs:documentation>
            The density of the material deposited in an additive manufacturing
            process per unit of volume.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEPOSITION_MASS">
				<xs:annotation>
					<xs:documentation>
            The mass of the material deposited in an additive manufacturing
            process.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEPOSITION_RATE_VOLUMETRIC">
				<xs:annotation>
					<xs:documentation>
            The rate at which a spatial volume of material is deposited in an
            additive manufacturing process.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEPOSITION_VOLUME">
				<xs:annotation>
					<xs:documentation>
            The spatial volume of material to be deposited in an additive
            manufacturing process.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DISPLACEMENT">
				<xs:annotation>
					<xs:documentation>
            The measurement of the change in position of an object.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ELECTRICAL_ENERGY">
				<xs:annotation>
					<xs:documentation>
            The measurement of electrical energy consumption by a component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="EQUIPMENT_TIMER">
				<xs:annotation>
					<xs:documentation>
            The measurement of the amount of time a piece of equipment or a
            sub-part of a piece of equipment has performed specific activities.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FILL_LEVEL">
				<xs:annotation>
					<xs:documentation>
            The measurement of the amount of a substance remaining compared to
            the planned maximum amount of that substance.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FLOW">
				<xs:annotation>
					<xs:documentation>
            The measurement of the rate of flow of a fluid.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FREQUENCY">
				<xs:annotation>
					<xs:documentation>
            The measurement of the number of occurrences of a repeating event
            per unit time.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="GLOBAL_POSITION">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in Version 1.1
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LENGTH">
				<xs:annotation>
					<xs:documentation>
            The measurement of the length of an object.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LEVEL">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in *Version 1.2*. See `FILL_LEVEL`. Represents the
            level of a resource.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LINEAR_FORCE">
				<xs:annotation>
					<xs:documentation>
            A {{term(Force)}} applied to a mass in one direction only.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LOAD">
				<xs:annotation>
					<xs:documentation>
            The measurement of the actual versus the standard rating of a piece
            of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MASS">
				<xs:annotation>
					<xs:documentation>
            The measurement of the mass of an object(s) or an amount of
            material.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PATH_FEEDRATE">
				<xs:annotation>
					<xs:documentation>
            The measurement of the feedrate for the axes, or a single axis,
            associated with a {{block(Path)}} component-a vector.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PATH_FEEDRATE_PER_REVOLUTION">
				<xs:annotation>
					<xs:documentation>
            The feedrate for the axes, or a single axis.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PATH_POSITION">
				<xs:annotation>
					<xs:documentation>
            A measured or calculated position of a control point associated with
            a {{block(Controller)}} element, or {{block(Path)}} element if
            provided, of a piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PH">
				<xs:annotation>
					<xs:documentation>
            A measure of the acidity or alkalinity of a solution.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="POSITION">
				<xs:annotation>
					<xs:documentation>
            A measured or calculated position of a {{block(Component)}} element
            as reported by a piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="POWER_FACTOR">
				<xs:annotation>
					<xs:documentation>
            The measurement of the ratio of real power flowing to a load to the
            apparent power in that AC circuit.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PRESSURE">
				<xs:annotation>
					<xs:documentation>
            The force per unit area measured relative to atmospheric pressure.
            Commonly referred to as gauge pressure.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROCESS_TIMER">
				<xs:annotation>
					<xs:documentation>
            The measurement of the amount of time a piece of equipment has
            performed different types of activities associated with the process
            being performed at that piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="RESISTANCE">
				<xs:annotation>
					<xs:documentation>
            The measurement of the degree to which a substance opposes the
            passage of an electric current.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ROTARY_VELOCITY">
				<xs:annotation>
					<xs:documentation>
            The measurement of the rotational speed of a rotary axis.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SOUND_LEVEL">
				<xs:annotation>
					<xs:documentation>
            The measurement of a sound level or sound pressure level relative to
            atmospheric pressure.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SPINDLE_SPEED">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in *Version 1.2*. Replaced by `ROTARY_VELOCITY`. The
            rotational speed of the rotary axis.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="STRAIN">
				<xs:annotation>
					<xs:documentation>
            The measurement of the amount of deformation per unit length of an
            object when a load is applied.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TEMPERATURE">
				<xs:annotation>
					<xs:documentation>
            The measurement of temperature.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TENSION">
				<xs:annotation>
					<xs:documentation>
            The measurement of a force that stretches or elongates an object.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TILT">
				<xs:annotation>
					<xs:documentation>
            The measurement of angular displacement.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TORQUE">
				<xs:annotation>
					<xs:documentation>
            The measurement of the turning force exerted on an object or by an
            object.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VELOCITY">
				<xs:annotation>
					<xs:documentation>
            The measurement of the rate of change of position of a
            {{block(Component)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VISCOSITY">
				<xs:annotation>
					<xs:documentation>
            The measurement of a fluids resistance to flow.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLTAGE">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in *Version 1.6*. Replaced by `VOLTAGE_AC` and
            `VOLTAGE_DC`. The measurement of electrical potential between two
            points.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLT_AMPERE">
				<xs:annotation>
					<xs:documentation>
            The measurement of the apparent power in an electrical circuit,
            equal to the product of root-mean-square (RMS) voltage and RMS
            current (commonly referred to as VA).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLT_AMPERE_REACTIVE">
				<xs:annotation>
					<xs:documentation>
            The measurement of reactive power in an AC electrical circuit
            (commonly referred to as VAR).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLUME_FLUID">
				<xs:annotation>
					<xs:documentation>
            The fluid volume of an object or container.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLUME_SPATIAL">
				<xs:annotation>
					<xs:documentation>
            The geometric volume of an object or container.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WATTAGE">
				<xs:annotation>
					<xs:documentation>
            The measurement of power flowing through or dissipated by an
            electrical circuit or piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="AMPERAGE_AC">
				<xs:annotation>
					<xs:documentation>
            The measurement of an electrical current that reverses direction at
            regular short intervals.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="AMPERAGE_DC">
				<xs:annotation>
					<xs:documentation>
            The measurement of an electric current flowing in one direction
            only.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLTAGE_AC">
				<xs:annotation>
					<xs:documentation>
            The measurement of the electrical potential between two points in an
            electrical circuit in which the current periodically reverses
            direction.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLTAGE_DC">
				<xs:annotation>
					<xs:documentation>
            The measurement of the electrical potential between two points in an
            electrical circuit in which the current is unidirectional.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="X_DIMENSION">
				<xs:annotation>
					<xs:documentation>
            Measured dimension of an entity relative to the X direction of the
            referenced coordinate system. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="Y_DIMENSION">
				<xs:annotation>
					<xs:documentation>
            Measured dimension of an entity relative to the Y direction of the
            referenced coordinate system.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="Z_DIMENSION">
				<xs:annotation>
					<xs:documentation>
            Measured dimension of an entity relative to the Z direction of the
            referenced coordinate system.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DIAMETER">
				<xs:annotation>
					<xs:documentation>
            The measured dimension of a diameter.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ORIENTATION">
				<xs:annotation>
					<xs:documentation>
            A measured or calculated orientation of a plane or vector relative
            to a cartesian coordinate system.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="HUMIDITY_RELATIVE">
				<xs:annotation>
					<xs:documentation>
            The amount of water vapor present expressed as a percent to reach
            saturation at the same temperature.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="HUMIDITY_ABSOLUTE">
				<xs:annotation>
					<xs:documentation>
            The amount of water vapor expressed in grams per cubic meter.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="HUMIDITY_SPECIFIC">
				<xs:annotation>
					<xs:documentation>
            The ratio of the water vapor present over the total weight of the
            water vapor and air present expressed as a percent.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OBSERVATION_UPDATE_RATE">
				<xs:annotation>
					<xs:documentation>
            The average rate of change of values for data items in the MTConnect
            streams. The average is computed over a rolling window defined by
            the implementation.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ASSET_UPDATE_RATE">
				<xs:annotation>
					<xs:documentation>
            The average rate of change of values for assets in the MTConnect
            streams. The average is computed over a rolling window defined by
            the implementation.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PRESSURIZATION_RATE">
				<xs:annotation>
					<xs:documentation>
            The change of pressure per unit time.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DECELERATION">
				<xs:annotation>
					<xs:documentation>
            Negative rate of change of velocity.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ANGULAR_DECELERATION">
				<xs:annotation>
					<xs:documentation>
            Negative rate of change of angular velocity.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PRESSURE_ABSOLUTE">
				<xs:annotation>
					<xs:documentation>
            The force per unit area measured relative to a vacuum.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ACTIVE_AXES">
				<xs:annotation>
					<xs:documentation>
            The set of axes currently associated with a {{block(Path)}} or
            {{block(Controller)}} {{term(Structural Element)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ACTUATOR_STATE">
				<xs:annotation>
					<xs:documentation>
            Represents the operational state of an apparatus for moving or
            controlling a mechanism or system.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ALARM">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED:** Replaced with {{block(CONDITION)}} category data
            items in Version 1.1.0.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ASSET_CHANGED">
				<xs:annotation>
					<xs:documentation>
            The {{block(assetId)}} of the asset that has been added or changed.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ASSET_REMOVED">
				<xs:annotation>
					<xs:documentation>
            The {{block(assetId)}} of the asset that has been removed.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="AVAILABILITY">
				<xs:annotation>
					<xs:documentation>
            Represents the {{term(Agent)}}&apos;s ability to communicate with
            the data source.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="AXIS_COUPLING">
				<xs:annotation>
					<xs:documentation>
            Describes the way the axes will be associated to each other. This is
            used in conjunction with {{block(COUPLED_AXES)}} to indicate the way
            they are interacting.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="AXIS_FEEDRATE_OVERRIDE">
				<xs:annotation>
					<xs:documentation>
            The value of a signal or calculation issued to adjust the feedrate
            of an individual linear type axis.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="AXIS_INTERLOCK">
				<xs:annotation>
					<xs:documentation>
            An indicator of the state of the axis lockout function when power
            has been removed and the axis is allowed to move freely.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="AXIS_STATE">
				<xs:annotation>
					<xs:documentation>
            An indicator of the controlled state of a {{block(Linear)}} or
            {{block(Rotary)}} component representing an axis.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="BLOCK">
				<xs:annotation>
					<xs:documentation>
            The line of code or command being executed by a
            {{block(Controller)}} {{term(Structural Element)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="BLOCK_COUNT">
				<xs:annotation>
					<xs:documentation>
            The total count of the number of blocks of program code that have
            been executed since execution started.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CHUCK_INTERLOCK">
				<xs:annotation>
					<xs:documentation>
            An indication of the operational condition of the interlock function
            for an electronically controller chuck.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CHUCK_STATE">
				<xs:annotation>
					<xs:documentation>
            An indication of the operating state of a mechanism that holds a
            part or stock material during a manufacturing process. It may also
            represent a mechanism that holds any other mechanism in place within
            a piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CLOSE_CHUCK">
				<xs:annotation>
					<xs:documentation>
            Service to close a chuck.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CLOSE_DOOR">
				<xs:annotation>
					<xs:documentation>
            Service to close a door.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CODE">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in *Version 1.1*. The programmatic code being
            executed.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="COMPOSITION_STATE">
				<xs:annotation>
					<xs:documentation>
            An indication of the operating condition of a mechanism represented
            by a {{block(Composition)}} type element.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CONTROLLER_MODE">
				<xs:annotation>
					<xs:documentation>
            The current operating mode of the {{block(Controller)}} component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CONTROLLER_MODE_OVERRIDE">
				<xs:annotation>
					<xs:documentation>
            A setting or operator selection that changes the behavior of a piece
            of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="COUPLED_AXES">
				<xs:annotation>
					<xs:documentation>
            Refers to the set of associated axes.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DATE_CODE">
				<xs:annotation>
					<xs:documentation>
            The time and date code associated with a material or other physical
            item.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEVICE_UUID">
				<xs:annotation>
					<xs:documentation>
            The identifier of another piece of equipment that is temporarily
            associated with a component of this piece of equipment to perform a
            particular function.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DIRECTION">
				<xs:annotation>
					<xs:documentation>
            An indication of a fault associated with the direction of motion of
            a {{term(Structural Element)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DOOR_STATE">
				<xs:annotation>
					<xs:documentation>
            The operational state of a {{block(Door)}} component or composition
            element.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="EMERGENCY_STOP">
				<xs:annotation>
					<xs:documentation>
            The current state of the emergency stop signal for a piece of
            equipment, controller path, or any other component or subsystem of a
            piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="END_OF_BAR">
				<xs:annotation>
					<xs:documentation>
            An indication that the end of a piece of bar stock has been reached.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="EQUIPMENT_MODE">
				<xs:annotation>
					<xs:documentation>
            An indication that a piece of equipment, or a sub-part of a piece of
            equipment, is performing specific types of activities.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="EXECUTION">
				<xs:annotation>
					<xs:documentation>
            The execution status of the {{block(Component)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FUNCTIONAL_MODE">
				<xs:annotation>
					<xs:documentation>
            The current intended production status of the device or component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="HARDNESS">
				<xs:annotation>
					<xs:documentation>
            The measurement of the hardness of a material.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INTERFACE_STATE">
				<xs:annotation>
					<xs:documentation>
            An indication of the operation condition of an {{block(Interface)}}
            component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LINE">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in *Version 1.4.0*. The current line of code being
            executed.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LINE_LABEL">
				<xs:annotation>
					<xs:documentation>
            An optional identifier for a {{block(Block)}} of code in a
            {{block(Program)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LINE_NUMBER">
				<xs:annotation>
					<xs:documentation>
            A reference to the position of a block of program code within a
            control program.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MATERIAL">
				<xs:annotation>
					<xs:documentation>
            The identifier of a material used or consumed in the manufacturing
            process.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MATERIAL_CHANGE">
				<xs:annotation>
					<xs:documentation>
            Service to change the type of material or product being loaded or
            fed to a piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MATERIAL_FEED">
				<xs:annotation>
					<xs:documentation>
            Service to advance material or feed product to a piece of equipment
            from a continuous or bulk source.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MATERIAL_LAYER">
				<xs:annotation>
					<xs:documentation>
            Identifies the layers of material applied to a part or product as
            part of an additive manufacturing process.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MATERIAL_LOAD">
				<xs:annotation>
					<xs:documentation>
            Service to load a piece of material or product.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MATERIAL_RETRACT">
				<xs:annotation>
					<xs:documentation>
            Service to remove or retract material or product.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MATERIAL_UNLOAD">
				<xs:annotation>
					<xs:documentation>
            Service to unload a piece of material or product.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MESSAGE">
				<xs:annotation>
					<xs:documentation>
            Any text string of information to be transferred from a piece of
            equipment to a client software application.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OPEN_CHUCK">
				<xs:annotation>
					<xs:documentation>
            Service to open a chuck.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OPEN_DOOR">
				<xs:annotation>
					<xs:documentation>
            Service to open a door.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OPERATOR_ID">
				<xs:annotation>
					<xs:documentation>
            The identifier of the person currently responsible for operating the
            piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PALLET_ID">
				<xs:annotation>
					<xs:documentation>
            The identifier for a pallet.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_CHANGE">
				<xs:annotation>
					<xs:documentation>
            Service to change the part or product associated with a piece of
            equipment to a different part or product.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_COUNT">
				<xs:annotation>
					<xs:documentation>
            The aggregate count of parts.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_DETECT">
				<xs:annotation>
					<xs:documentation>
            An indication designating whether a part or work piece has been
            detected or is present.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_ID">
				<xs:annotation>
					<xs:documentation>
            An identifier of a part in a manufacturing operation.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_NUMBER">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in *Version 1.7*. `PART_NUMBER` is now a `subType` of
            `PART_KIND_ID`. An identifier of a part or product moving through
            the manufacturing process.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PATH_FEEDRATE_OVERRIDE">
				<xs:annotation>
					<xs:documentation>
            The value of a signal or calculation issued to adjust the feedrate
            for the axes associated with a {{block(Path)}} component that may
            represent a single axis or the coordinated movement of multiple
            axes.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PATH_MODE">
				<xs:annotation>
					<xs:documentation>
            Describes the operational relationship between a {{block(Path)}}
            {{term(Structural Element)}} and another {{block(Path)}}
            {{term(Structural Element)}} for pieces of equipment comprised of
            multiple logical groupings of controlled axes or other logical
            operations.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="POWER_STATE">
				<xs:annotation>
					<xs:documentation>
            The indication of the status of the source of energy for a
            {{term(Structural Element)}} to allow it to perform its intended
            function or the state of an enabling signal providing permission for
            the {{term(Structural Element)}} to perform its functions.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="POWER_STATUS">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in *Version 1.1.0*. The `ON` or `OFF` status of the
            component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROCESS_TIME">
				<xs:annotation>
					<xs:documentation>
            The time and date associated with an activity or event.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROGRAM">
				<xs:annotation>
					<xs:documentation>
            The name of the logic or motion program being executed by the
            {{block(Controller)}} component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROGRAM_COMMENT">
				<xs:annotation>
					<xs:documentation>
            A comment or non-executable statement in the control program.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROGRAM_EDIT">
				<xs:annotation>
					<xs:documentation>
            An indication of the status of the {{block(Controller)}} components
            program editing mode. A program may be edited while another is
            executed.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROGRAM_EDIT_NAME">
				<xs:annotation>
					<xs:documentation>
            The name of the program being edited. This is used in conjunction
            with {{block(ProgramEdit)}} when in `ACTIVE` state. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROGRAM_HEADER">
				<xs:annotation>
					<xs:documentation>
            The non-executable header section of the control program.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROGRAM_LOCATION">
				<xs:annotation>
					<xs:documentation>
            The Uniform Resource Identifier (URI) for the source file associated
            with {{block(Program)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROGRAM_LOCATION_TYPE">
				<xs:annotation>
					<xs:documentation>
            Defines whether the logic or motion program defined by
            {{block(Program)}} is being executed from the local memory of the
            controller or from an outside source.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROGRAM_NEST_LEVEL">
				<xs:annotation>
					<xs:documentation>
            An indication of the nesting level within a control program that is
            associated with the code or instructions that is currently being
            executed.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ROTARY_MODE">
				<xs:annotation>
					<xs:documentation>
            The current operating mode for a {{block(Rotary)}} type axis.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ROTARY_VELOCITY_OVERRIDE">
				<xs:annotation>
					<xs:documentation>
            The percentage change to the velocity of the programmed velocity for
            a {{block(Rotary)}} type axis.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SERIAL_NUMBER">
				<xs:annotation>
					<xs:documentation>
            The serial number associated with a {{block(Component)}},
            {{block(Asset)}}, or {{block(Device)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SPINDLE_INTERLOCK">
				<xs:annotation>
					<xs:documentation>
            An indication of the status of the spindle for a piece of equipment
            when power has been removed and it is free to rotate.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TOOL_ASSET_ID">
				<xs:annotation>
					<xs:documentation>
            The identifier of an individual tool asset.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TOOL_GROUP">
				<xs:annotation>
					<xs:documentation>
            An identifier for the tool group associated with a specific tool.
            Commonly used to designate spare tools.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TOOL_ID">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in *Version 1.2.0*. See `TOOL_ASSET_ID`. The
            identifier of the tool currently in use for a given `Path`.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TOOL_NUMBER">
				<xs:annotation>
					<xs:documentation>
            The identifier assigned by the {{block(Controller)}} component to a
            cutting tool when in use by a piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TOOL_OFFSET">
				<xs:annotation>
					<xs:documentation>
            A reference to the tool offset variables applied to the active
            cutting tool associated with a {{block(Path)}} in a
            {{block(Controller)}} type component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="USER">
				<xs:annotation>
					<xs:documentation>
            The identifier of the person currently responsible for operating the
            piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VARIABLE">
				<xs:annotation>
					<xs:documentation>
            A data value whose meaning may change over time due to changes in
            the opertion of a piece of equipment or the process being executed
            on that piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WAIT_STATE">
				<xs:annotation>
					<xs:documentation>
            An indication of the reason that {{block(Execution)}} is reporting a
            value of `WAIT`.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WIRE">
				<xs:annotation>
					<xs:documentation>
            A string like piece or filament of relatively rigid or flexible
            material provided in a variety of diameters.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WORKHOLDING_ID">
				<xs:annotation>
					<xs:documentation>
            The identifier for the current workholding or part clamp in use by a
            piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WORK_OFFSET">
				<xs:annotation>
					<xs:documentation>
            A reference to the offset variables for a work piece or part
            associated with a {{block(Path)}} in a {{block(Controller)}} type
            component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OPERATING_SYSTEM">
				<xs:annotation>
					<xs:documentation>
            The Operating System of a component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FIRMWARE">
				<xs:annotation>
					<xs:documentation>
            The embedded software of a component. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="APPLICATION">
				<xs:annotation>
					<xs:documentation>
            The application on a component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LIBRARY">
				<xs:annotation>
					<xs:documentation>
            The software library on a component
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="HARDWARE">
				<xs:annotation>
					<xs:documentation>
            An indication of a fault associated with the hardware subsystem of
            the {{term(Structural Element)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="NETWORK">
				<xs:annotation>
					<xs:documentation>
            Network details of a component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ROTATION">
				<xs:annotation>
					<xs:documentation>
            A three space angular rotation relative to a coordinate system.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TRANSLATION">
				<xs:annotation>
					<xs:documentation>
            A three space linear translation relative to a coordinate system.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEVICE_ADDED">
				<xs:annotation>
					<xs:documentation>
            An {{block(Event)}} that provides the {{term(UUID)}} of new device
            added to an {{term(MTConnect Agent)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEVICE_REMOVED">
				<xs:annotation>
					<xs:documentation>
            An {{block(Event)}} that provides the {{term(UUID)}} of a device
            removed from an {{term(MTConnect Agent)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEVICE_CHANGED">
				<xs:annotation>
					<xs:documentation>
            An {{block(Event)}} that provides the {{term(UUID)}} of the device
            whose {{term(Metadata)}} has changed.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CONNECTION_STATUS">
				<xs:annotation>
					<xs:documentation>
            The status of the connection between an {{term(Adapter)}} and an
            {{term(Agent)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ADAPTER_SOFTWARE_VERSION">
				<xs:annotation>
					<xs:documentation>
            The originator’s software version of the {{term(Adapter)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ADAPTER_URI">
				<xs:annotation>
					<xs:documentation>
            The {{term(URI)}} of the {{term(Adapter)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MTCONNECT_VERSION">
				<xs:annotation>
					<xs:documentation>
            The reference version of the MTConnect Standard supported by the
            {{term(Adapter)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SENSOR_ATTACHMENT">
				<xs:annotation>
					<xs:documentation>
            An {{block(Event)}} defining an {{term(Attachment)}} between a
            sensor and an entity.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_STATUS">
				<xs:annotation>
					<xs:documentation>
            State or condition of a part.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROCESS_OCCURRENCE_ID">
				<xs:annotation>
					<xs:documentation>
            An identifier of a process being executed by the device.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROCESS_AGGREGATE_ID">
				<xs:annotation>
					<xs:documentation>
            Identifier given to link the individual occurrence to a group of
            related occurrences, such as a process step in a process plan.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROCESS_KIND_ID">
				<xs:annotation>
					<xs:documentation>
            Identifier given to link the individual occurrence to a class of
            processes or process definition. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_GROUP_ID">
				<xs:annotation>
					<xs:documentation>
            Identifier given to a collection of individual parts. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_KIND_ID">
				<xs:annotation>
					<xs:documentation>
            Identifier given to link the individual occurrence to a class of
            parts, typically distinguished by a particular part design.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_UNIQUE_ID">
				<xs:annotation>
					<xs:documentation>
            Identifier given to a distinguishable, individual part. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CONTROL_LIMIT">
				<xs:annotation>
					<xs:documentation>
            A set of limits used to indicate whether a process variable is
            stable and in control.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SPECIFICATION_LIMIT">
				<xs:annotation>
					<xs:documentation>
            A set of limits defining a range of values designating acceptable
            performance for a variable.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ALARM_LIMIT">
				<xs:annotation>
					<xs:documentation>
            A set of limits used to trigger warning or alarm indicators.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="COMMUNICATIONS">
				<xs:annotation>
					<xs:documentation>
            An indication that the piece of equipment has experienced a
            communications failure.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DATA_RANGE">
				<xs:annotation>
					<xs:documentation>
            An indication that the value of the data associated with a measured
            value or a calculation is outside of an expected range.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LOGIC_PROGRAM">
				<xs:annotation>
					<xs:documentation>
            An indication that an error occurred in the logic program or
            programmable logic controller (PLC) associated with a piece of
            equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MOTION_PROGRAM">
				<xs:annotation>
					<xs:documentation>
            An indication that an error occurred in the motion program
            associated with a piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SYSTEM">
				<xs:annotation>
					<xs:documentation>
            A general purpose indication associated with an electronic component
            of a piece of equipment or a controller that represents a fault that
            is not associated with the operator, program, or hardware.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ACTUATOR">
				<xs:annotation>
					<xs:documentation>
            An indication of a fault associated with an actuator.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VARIABLE">
				<xs:annotation>
					<xs:documentation>
            A user variable
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="DataItemEnumType">
		<xs:annotation>
			<xs:documentation>
        The types of measurements available
      </xs:documentation>
		</xs:annotation>
		<xs:union memberTypes="DataItemEnumEnum DataItemEnumExtType"/>
	</xs:simpleType>
	<xs:simpleType name="DataItemSubEnumExtType">
		<xs:annotation>
			<xs:documentation>
        Extended tyoe for The sub-types for a measurement
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:pattern value="[a-ln-z][a-z]+:[A-Z_0-9]+"/>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="DataItemSubEnumEnum">
		<xs:annotation>
			<xs:documentation>
        The sub-types for a measurement
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:enumeration value="ABSOLUTE">
				<xs:annotation>
					<xs:documentation>
            Relating to or derived in the simplest manner from the fundamental
            units or measurements.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ACTION">
				<xs:annotation>
					<xs:documentation>
            An indication of the operating state of a mechanism.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ACTUAL">
				<xs:annotation>
					<xs:documentation>
            The measured value.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ALL">
				<xs:annotation>
					<xs:documentation>
            The number of parts produced.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ALTERNATING">
				<xs:annotation>
					<xs:documentation>
            The measurement of alternating voltage or current. If not specified
            further in statistic, defaults to RMS voltage. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="A_SCALE">
				<xs:annotation>
					<xs:documentation>
            A Scale weighting factor.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="AUXILIARY">
				<xs:annotation>
					<xs:documentation>
            When multiple locations on a piece of bar stock being feed by a bar
            feeder are referenced as the indication of whether the end of that
            piece of bar stock has been reached.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="BAD">
				<xs:annotation>
					<xs:documentation>
            The number of parts produced that do not conform to specification.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="BRINELL">
				<xs:annotation>
					<xs:documentation>
            A scale to measure the resistance to deformation of a surface.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="B_SCALE">
				<xs:annotation>
					<xs:documentation>
            B Scale weighting factor.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="COMMANDED">
				<xs:annotation>
					<xs:documentation>
            The commanded value.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CONSUMED">
				<xs:annotation>
					<xs:documentation>
            The amount of material consumed from an object or container during a
            manufacturing process.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CONTROL">
				<xs:annotation>
					<xs:documentation>
            The state of the enabling signal or control logic that enables or
            disables the function or operation of the structural element.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="C_SCALE">
				<xs:annotation>
					<xs:documentation>
            C Scale weighting factor.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DELAY">
				<xs:annotation>
					<xs:documentation>
            A piece of equipment or process waiting for an event or an action to
            occur.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DIRECT">
				<xs:annotation>
					<xs:documentation>
            The measurement of DC current or voltage.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DRY_RUN">
				<xs:annotation>
					<xs:documentation>
            A setting or operator selection used to execute a test mode to
            confirm the execution of machine functions.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="D_SCALE">
				<xs:annotation>
					<xs:documentation>
            D Scale weighting factor.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="EXPIRATION">
				<xs:annotation>
					<xs:documentation>
            The time and date code relating to the expiration or end of useful
            life for a material or other physical item.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FIRST_USE">
				<xs:annotation>
					<xs:documentation>
            The time and date code relating the first use of a material or other
            physical item.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="GOOD">
				<xs:annotation>
					<xs:documentation>
            The number of parts produced that conform to specification.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INCREMENTAL">
				<xs:annotation>
					<xs:documentation>
            Relating to or derived from the last {{term(observation)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="JOG">
				<xs:annotation>
					<xs:documentation>
            The feedrate specified by a logic or motion program when operating
            in a manual state or method (jogging).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LATERAL">
				<xs:annotation>
					<xs:documentation>
            An indication of the position of a mechanism that may move in a
            lateral direction.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LEEB">
				<xs:annotation>
					<xs:documentation>
            A scale to measure the elasticity of a surface.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LENGTH">
				<xs:annotation>
					<xs:documentation>
            A reference to a length type tool offset variable.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LINE">
				<xs:annotation>
					<xs:documentation>
            The state of the power source.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LINEAR">
				<xs:annotation>
					<xs:documentation>
            The direction of motion of a linear motion.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LOADED">
				<xs:annotation>
					<xs:documentation>
            Subparts of a piece of equipment are under load.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MACHINE_AXIS_LOCK">
				<xs:annotation>
					<xs:documentation>
            A setting or operator selection that changes the behavior of the
            controller on a piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MAIN">
				<xs:annotation>
					<xs:documentation>
            Relating to the primary logic or motion program currently being
            executed.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MAINTENANCE">
				<xs:annotation>
					<xs:documentation>
            Relating to maintenance on the piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MANUAL_UNCLAMP">
				<xs:annotation>
					<xs:documentation>
            An indication of the state of an operator controlled interlock that
            can inhibit the ability to initiate an unclamp action of an
            electronically controlled chuck.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MANUFACTURE">
				<xs:annotation>
					<xs:documentation>
            Related to the production of a material or other physical item.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MAXIMUM">
				<xs:annotation>
					<xs:documentation>
            The maximum value.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MINIMUM">
				<xs:annotation>
					<xs:documentation>
            The minimum value.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MOHS">
				<xs:annotation>
					<xs:documentation>
            A scale to measure the resistance to scratching of a surface.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MOTION">
				<xs:annotation>
					<xs:documentation>
            An indication of the open or closed state of a mechanism.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="NO_SCALE">
				<xs:annotation>
					<xs:documentation>
            No weighting factor on the frequency scale.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OPERATING">
				<xs:annotation>
					<xs:documentation>
            A piece of equipment that is powered or performing any activity.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OPERATOR">
				<xs:annotation>
					<xs:documentation>
            Relating to the person currently responsible for operating the piece
            of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OPTIONAL_STOP">
				<xs:annotation>
					<xs:documentation>
            A setting or operator selection that changes the behavior of the
            controller on a piece of equipment. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OVERRIDE">
				<xs:annotation>
					<xs:documentation>
            The overridden value.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="POWERED">
				<xs:annotation>
					<xs:documentation>
            A piece of equipment is powered and functioning or
            {{termplural(Component)}} that are required to remain on are
            powered.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PRIMARY">
				<xs:annotation>
					<xs:documentation>
            The main or most important location **MUST** be designated as the
            end of a piece of bar stock.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROBE">
				<xs:annotation>
					<xs:documentation>
            The value provided by a measurement probe.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROCESS">
				<xs:annotation>
					<xs:documentation>
            Relating to production of a part or product on a piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROGRAMMED">
				<xs:annotation>
					<xs:documentation>
            The programmed value.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="RADIAL">
				<xs:annotation>
					<xs:documentation>
            A reference to a radial type tool offset variable.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="RAPID">
				<xs:annotation>
					<xs:documentation>
            The feedrate specified by a logic or motion program when operating
            in a rapid positioning mode.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="REMAINING">
				<xs:annotation>
					<xs:documentation>
            The remaining measure of an object or an action.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ROCKWELL">
				<xs:annotation>
					<xs:documentation>
            A scale to measure the resistance to deformation of a surface.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ROTARY">
				<xs:annotation>
					<xs:documentation>
            The direction of a rotary motion using the right hand rule
            convention.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SCHEDULE">
				<xs:annotation>
					<xs:documentation>
            The identity of a control program that is used to specify the order
            of execution of other programs.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SET_UP">
				<xs:annotation>
					<xs:documentation>
            Relating to the preparation of a piece of equipment for production
            or restoring the piece of equipment to a neutral state after
            production.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SHORE">
				<xs:annotation>
					<xs:documentation>
            A scale to measure the resistance to deformation of a surface.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SINGLE_BLOCK">
				<xs:annotation>
					<xs:documentation>
            A setting or operator selection that changes the behavior of the
            controller on a piece of equipment. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="STANDARD">
				<xs:annotation>
					<xs:documentation>
            The standard measure of an object or an action.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="START">
				<xs:annotation>
					<xs:documentation>
            Relating to the beginning of an activity or event.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SWITCHED">
				<xs:annotation>
					<xs:documentation>
            An indication of the activation state of a mechanism represented by
            a {{term(Composition)}}.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TARGET">
				<xs:annotation>
					<xs:documentation>
            The targeted or desired value.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TARGET_COMPLETION">
				<xs:annotation>
					<xs:documentation>
            Relating to the end or completion of an activity or event.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TOOL_CHANGE_STOP">
				<xs:annotation>
					<xs:documentation>
            A setting or operator selection that changes the behavior of the
            controller on a piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="USEABLE">
				<xs:annotation>
					<xs:documentation>
            The remaining usable measure of an object or action.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VERTICAL">
				<xs:annotation>
					<xs:documentation>
            An indication of the position of a mechanism that may move in a
            vertical direction.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VICKERS">
				<xs:annotation>
					<xs:documentation>
            A scale to measure the resistance to deformation of a surface.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WORKING">
				<xs:annotation>
					<xs:documentation>
            A piece of equipment performing any activity, the equipment is
            active and performing a function under load or not.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="IPV4_ADDRESS">
				<xs:annotation>
					<xs:documentation>
            The IPV4 network address of the component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="IPV6_ADDRESS">
				<xs:annotation>
					<xs:documentation>
            The IPV6 network address of the component.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="GATEWAY">
				<xs:annotation>
					<xs:documentation>
            The Gateway for the component network.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SUBNET_MASK">
				<xs:annotation>
					<xs:documentation>
            The SubNet mask for the component network. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VLAN_ID">
				<xs:annotation>
					<xs:documentation>
            The layer2 Virtual Local Network (VLAN) ID for the component
            network.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MAC_ADDRESS">
				<xs:annotation>
					<xs:documentation>
            Media Access Control Address. The unique physical address of the
            network hardware.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WIRELESS">
				<xs:annotation>
					<xs:documentation>
            Identifies whether the connection type is wireless.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LICENSE">
				<xs:annotation>
					<xs:documentation>
            The license code to validate or activate the hardware or software.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VERSION">
				<xs:annotation>
					<xs:documentation>
            The version of the hardware or software. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="RELEASE_DATE">
				<xs:annotation>
					<xs:documentation>
            The date the hardware or software was released for general use.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INSTALL_DATE">
				<xs:annotation>
					<xs:documentation>
            The date the hardware or software was installed.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MANUFACTURER">
				<xs:annotation>
					<xs:documentation>
            The corporate identity for the maker of the hardware or software.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="UUID">
				<xs:annotation>
					<xs:documentation>
            The globally unique identifier as specified in ISO 11578 or RFC
            4122.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SERIAL_NUMBER">
				<xs:annotation>
					<xs:documentation>
            A serial number that uniquely identifies a specific part.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="RAW_MATERIAL">
				<xs:annotation>
					<xs:documentation>
            A singular piece of material.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LOT">
				<xs:annotation>
					<xs:documentation>
            A group of parts tracked as a lot.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="BATCH">
				<xs:annotation>
					<xs:documentation>
            A group of parts produced in a batch.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="HEAT_TREAT">
				<xs:annotation>
					<xs:documentation>
            A material heat number.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_NUMBER">
				<xs:annotation>
					<xs:documentation>
            A particular part design or model.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_FAMILY">
				<xs:annotation>
					<xs:documentation>
            A group of parts having similarities in geometry, manufacturing
            process, and/or functions.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PART_NAME">
				<xs:annotation>
					<xs:documentation>
            A word or set of words by which a part is known, addressed, or
            referred to.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROCESS_STEP">
				<xs:annotation>
					<xs:documentation>
            A step in the process plan that this occurrence corresponds to. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROCESS_PLAN">
				<xs:annotation>
					<xs:documentation>
            A process plan that a process occurrence belongs to.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ORDER_NUMBER">
				<xs:annotation>
					<xs:documentation>
            The authorization of a process occurrence.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PROCESS_NAME">
				<xs:annotation>
					<xs:documentation>
            A word or set of words by which a process being executed (process
            occurrence) by the device is known, addressed, or referred to. 
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ISO_STEP_EXECUTABLE">
				<xs:annotation>
					<xs:documentation>
            A reference to a ISO 10303 Executable.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="COMPLETE">
				<xs:annotation>
					<xs:documentation>
            Associated with the completion of an activity or event.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ACTIVE">
				<xs:annotation>
					<xs:documentation>
            Relating to logic or motion program currently executing.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
		</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="DataItemSubEnumEnum DataItemSubEnumExtType"/>
	</xs:simpleType>
	<xs:simpleType name="DataItemStatisticsExtType">
		<xs:annotation>
			<xs:documentation>
        Extended tyoe for Statistical operations on data
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:pattern value="[a-ln-z][a-z]+:[A-Z_0-9]+"/>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="DataItemStatisticsEnum">
		<xs:annotation>
			<xs:documentation>
        Statistical operations on data
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:enumeration value="AVERAGE">
				<xs:annotation>
					<xs:documentation>
            Mathematical Average value calculated for the data item during the
            calculation period.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="KURTOSIS">
				<xs:annotation>
					<xs:documentation>
            **DEPRECATED** in *Version 1.6*. ~~A measure of the
            &quot;peakedness&quot; of a probability distribution; i.e., the
            shape of the distribution curve.~~
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MAXIMUM">
				<xs:annotation>
					<xs:documentation>
            Maximum or peak value recorded for the data item during the
            calculation period.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MEDIAN">
				<xs:annotation>
					<xs:documentation>
            The middle number of a series of numbers.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MINIMUM">
				<xs:annotation>
					<xs:documentation>
            Minimum value recorded for the data item during the calculation
            period.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MODE">
				<xs:annotation>
					<xs:documentation>
            The number in a series of numbers that occurs most often.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="RANGE">
				<xs:annotation>
					<xs:documentation>
            Difference between the maximum and minimum value of a data item
            during the calculation period. Also represents Peak-to-Peak
            measurement in a waveform.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ROOT_MEAN_SQUARE">
				<xs:annotation>
					<xs:documentation>
            Mathematical Root Mean Square (RMS) value calculated for the data
            item during the calculation period.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="STANDARD_DEVIATION">
				<xs:annotation>
					<xs:documentation>
            Statistical Standard Deviation value calculated for the data item
            during the calculation period.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="DataItemStatisticsType">
		<xs:annotation>
			<xs:documentation>
        Statistical operations on data
      </xs:documentation>
		</xs:annotation>
		<xs:union memberTypes="DataItemStatisticsEnum DataItemStatisticsExtType"/>
	</xs:simpleType>
	<xs:simpleType name="UnitsExtType">
		<xs:annotation>
			<xs:documentation>
        Extended tyoe for The units supported
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:pattern value="[a-ln-z][a-z]+:[A-Z_0-9]+"/>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="UnitsEnum">
		<xs:annotation>
			<xs:documentation>
        The units supported
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:enumeration value="AMPERE">
				<xs:annotation>
					<xs:documentation>
            Amps
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CELSIUS">
				<xs:annotation>
					<xs:documentation>
            Degrees Celsius
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="COUNT">
				<xs:annotation>
					<xs:documentation>
            A count of something.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DECIBEL">
				<xs:annotation>
					<xs:documentation>
            Sound Level
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEGREE">
				<xs:annotation>
					<xs:documentation>
            Angle in degrees
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEGREE_3D">
				<xs:annotation>
					<xs:documentation>
            A space-delimited, floating-point representation of the angular
            rotation in degrees around the X, Y, and Z axes relative to a
            cartesian coordinate system respectively in order as A, B, and C. If
            any of the rotations is not known, it **MUST** be zero (0).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEGREE/SECOND">
				<xs:annotation>
					<xs:documentation>
            Angular degrees per second
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEGREE/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Angular acceleration in degrees per second squared
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="HERTZ">
				<xs:annotation>
					<xs:documentation>
            Frequency measured in cycles per second
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="JOULE">
				<xs:annotation>
					<xs:documentation>
            A measurement of energy.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="KILOGRAM">
				<xs:annotation>
					<xs:documentation>
            Kilograms
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LITER">
				<xs:annotation>
					<xs:documentation>
            Measurement of volume of a fluid
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LITER/SECOND">
				<xs:annotation>
					<xs:documentation>
            Liters per second
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MICRO_RADIAN">
				<xs:annotation>
					<xs:documentation>
            Measurement of Tilt
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER">
				<xs:annotation>
					<xs:documentation>
            Millimeters
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER_3D">
				<xs:annotation>
					<xs:documentation>
            A point in space identified by X, Y, and Z positions and represented
            by a space-delimited set of numbers each expressed in millimeters.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER/REVOLUTION">
				<xs:annotation>
					<xs:documentation>
            Millimeters per revolution.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER/SECOND">
				<xs:annotation>
					<xs:documentation>
            Millimeters per second
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Acceleration in millimeters per second squared
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="NEWTON">
				<xs:annotation>
					<xs:documentation>
            Force in Newtons
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="NEWTON_METER">
				<xs:annotation>
					<xs:documentation>
            Torque, a unit for force times distance.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OHM">
				<xs:annotation>
					<xs:documentation>
            Measure of Electrical Resistance
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PASCAL">
				<xs:annotation>
					<xs:documentation>
            Pressure in Newtons per square meter
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PASCAL_SECOND">
				<xs:annotation>
					<xs:documentation>
            Measurement of Viscosity
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PERCENT">
				<xs:annotation>
					<xs:documentation>
            Percentage
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PH">
				<xs:annotation>
					<xs:documentation>
            A measure of the acidity or alkalinity of a solution.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="REVOLUTION/MINUTE">
				<xs:annotation>
					<xs:documentation>
            Revolutions per minute
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SECOND">
				<xs:annotation>
					<xs:documentation>
            A measurement of time.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SIEMENS/METER">
				<xs:annotation>
					<xs:documentation>
            A measurement of Electrical Conductivity
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLT">
				<xs:annotation>
					<xs:documentation>
            Volts
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLT_AMPERE">
				<xs:annotation>
					<xs:documentation>
            The measurement of the apparent power in an electrical circuit,
            equal to the product of root-mean-square (RMS) voltage and RMS
            current (commonly referred to as VA).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLT_AMPERE_REACTIVE">
				<xs:annotation>
					<xs:documentation>
            The measurement of reactive power in an AC electrical circuit
            (commonly referred to as VAR).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WATT">
				<xs:annotation>
					<xs:documentation>
            Watts
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WATT_SECOND">
				<xs:annotation>
					<xs:documentation>
            Measurement of electrical energy, equal to one Joule
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="REVOLUTION/SECOND">
				<xs:annotation>
					<xs:documentation>
            Revolutions per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="REVOLUTION/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Revolutions per second squared.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="GRAM/CUBIC_METER">
				<xs:annotation>
					<xs:documentation>
            Gram per cubic meter.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CUBIC_MILLIMETER">
				<xs:annotation>
					<xs:documentation>
            Geometric volume in millimeters.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CUBIC_MILLIMETER/SECOND">
				<xs:annotation>
					<xs:documentation>
            Change of geometric volume per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CUBIC_MILLIMETER/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Change in geometric volume per second squared.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIGRAM">
				<xs:annotation>
					<xs:documentation>
            Milligram.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIGRAM/CUBIC_MILLIMETER">
				<xs:annotation>
					<xs:documentation>
            Milligram per cubic millimeter.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLILITER">
				<xs:annotation>
					<xs:documentation>
            Milliliter.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="COUNT/SECOND">
				<xs:annotation>
					<xs:documentation>
            Counts per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PASCAL/SECOND">
				<xs:annotation>
					<xs:documentation>
            Pascal per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="UNIT_VECTOR_3D">
				<xs:annotation>
					<xs:documentation>
            A 3D Unit Vector. Space delimited list of three floating point
            numbers.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="UnitsType">
		<xs:annotation>
			<xs:documentation>
        The units supported
      </xs:documentation>
		</xs:annotation>
		<xs:union memberTypes="UnitsEnum UnitsExtType"/>
	</xs:simpleType>
	<xs:simpleType name="NativeUnitsExtType">
		<xs:annotation>
			<xs:documentation>
        Extended tyoe for The units supported for the source equipment that can
        be converted into MTC Units.
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:pattern value="[a-ln-z][a-z]+:[A-Z_0-9]+"/>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="NativeUnitsEnum">
		<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:annotation>
					<xs:documentation>
            Amps
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CELSIUS">
				<xs:annotation>
					<xs:documentation>
            Degrees Celsius
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="COUNT">
				<xs:annotation>
					<xs:documentation>
            A count of something.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DECIBEL">
				<xs:annotation>
					<xs:documentation>
            Sound Level
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEGREE">
				<xs:annotation>
					<xs:documentation>
            Angle in degrees
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEGREE_3D">
				<xs:annotation>
					<xs:documentation>
            A space-delimited, floating-point representation of the angular
            rotation in degrees around the X, Y, and Z axes relative to a
            cartesian coordinate system respectively in order as A, B, and C. If
            any of the rotations is not known, it **MUST** be zero (0).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEGREE/SECOND">
				<xs:annotation>
					<xs:documentation>
            Angular degrees per second
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEGREE/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Angular acceleration in degrees per second squared
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="HERTZ">
				<xs:annotation>
					<xs:documentation>
            Frequency measured in cycles per second
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="JOULE">
				<xs:annotation>
					<xs:documentation>
            A measurement of energy.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="KILOGRAM">
				<xs:annotation>
					<xs:documentation>
            Kilograms
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LITER">
				<xs:annotation>
					<xs:documentation>
            Measurement of volume of a fluid
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LITER/SECOND">
				<xs:annotation>
					<xs:documentation>
            Liters per second
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MICRO_RADIAN">
				<xs:annotation>
					<xs:documentation>
            Measurement of Tilt
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER">
				<xs:annotation>
					<xs:documentation>
            Millimeters
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER_3D">
				<xs:annotation>
					<xs:documentation>
            A point in space identified by X, Y, and Z positions and represented
            by a space-delimited set of numbers each expressed in millimeters.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER/REVOLUTION">
				<xs:annotation>
					<xs:documentation>
            Millimeters per revolution.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER/SECOND">
				<xs:annotation>
					<xs:documentation>
            Millimeters per second
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Acceleration in millimeters per second squared
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="NEWTON">
				<xs:annotation>
					<xs:documentation>
            Force in Newtons
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="NEWTON_METER">
				<xs:annotation>
					<xs:documentation>
            Torque, a unit for force times distance.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OHM">
				<xs:annotation>
					<xs:documentation>
            Measure of Electrical Resistance
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PASCAL">
				<xs:annotation>
					<xs:documentation>
            Pressure in Newtons per square meter
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PASCAL_SECOND">
				<xs:annotation>
					<xs:documentation>
            Measurement of Viscosity
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PERCENT">
				<xs:annotation>
					<xs:documentation>
            Percentage
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PH">
				<xs:annotation>
					<xs:documentation>
            A measure of the acidity or alkalinity of a solution.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="REVOLUTION/MINUTE">
				<xs:annotation>
					<xs:documentation>
            Revolutions per minute
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SECOND">
				<xs:annotation>
					<xs:documentation>
            A measurement of time.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SIEMENS/METER">
				<xs:annotation>
					<xs:documentation>
            A measurement of Electrical Conductivity
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLT">
				<xs:annotation>
					<xs:documentation>
            Volts
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLT_AMPERE">
				<xs:annotation>
					<xs:documentation>
            The measurement of the apparent power in an electrical circuit,
            equal to the product of root-mean-square (RMS) voltage and RMS
            current (commonly referred to as VA).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="VOLT_AMPERE_REACTIVE">
				<xs:annotation>
					<xs:documentation>
            The measurement of reactive power in an AC electrical circuit
            (commonly referred to as VAR).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WATT">
				<xs:annotation>
					<xs:documentation>
            Watts
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WATT_SECOND">
				<xs:annotation>
					<xs:documentation>
            Measurement of electrical energy, equal to one Joule
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="REVOLUTION/SECOND">
				<xs:annotation>
					<xs:documentation>
            Revolutions per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="REVOLUTION/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Revolutions per second squared.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="GRAM/CUBIC_METER">
				<xs:annotation>
					<xs:documentation>
            Gram per cubic meter.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CUBIC_MILLIMETER">
				<xs:annotation>
					<xs:documentation>
            Geometric volume in millimeters.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CUBIC_MILLIMETER/SECOND">
				<xs:annotation>
					<xs:documentation>
            Change of geometric volume per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CUBIC_MILLIMETER/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Change in geometric volume per second squared.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIGRAM">
				<xs:annotation>
					<xs:documentation>
            Milligram.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIGRAM/CUBIC_MILLIMETER">
				<xs:annotation>
					<xs:documentation>
            Milligram per cubic millimeter.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLILITER">
				<xs:annotation>
					<xs:documentation>
            Milliliter.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="COUNT/SECOND">
				<xs:annotation>
					<xs:documentation>
            Counts per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PASCAL/SECOND">
				<xs:annotation>
					<xs:documentation>
            Pascal per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="UNIT_VECTOR_3D">
				<xs:annotation>
					<xs:documentation>
            A 3D Unit Vector. Space delimited list of three floating point
            numbers.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="CENTIPOISE">
				<xs:annotation>
					<xs:documentation>
            A measure of viscosity.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DEGREE/MINUTE">
				<xs:annotation>
					<xs:documentation>
            Rotational velocity in degrees per minute.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FAHRENHEIT">
				<xs:annotation>
					<xs:documentation>
            Temperature in Fahrenheit.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FOOT">
				<xs:annotation>
					<xs:documentation>
            Feet.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FOOT/MINUTE">
				<xs:annotation>
					<xs:documentation>
            Feet per minute.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FOOT/SECOND">
				<xs:annotation>
					<xs:documentation>
            Feet per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FOOT/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Acceleration in feet per second squared.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="FOOT_3D">
				<xs:annotation>
					<xs:documentation>
            A point in space identified by X, Y, and Z positions and represented
            by a space-delimited set of numbers each expressed in feet.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="GALLON/MINUTE">
				<xs:annotation>
					<xs:documentation>
            Gallons per minute.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="HOUR">
				<xs:annotation>
					<xs:documentation>
            A measurement of time in hours.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INCH">
				<xs:annotation>
					<xs:documentation>
            Inches.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INCH/MINUTE">
				<xs:annotation>
					<xs:documentation>
            Inches per minute.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INCH/SECOND">
				<xs:annotation>
					<xs:documentation>
            Inches per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INCH/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Acceleration in inches per second squared.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INCH_POUND">
				<xs:annotation>
					<xs:documentation>
            A measure of torque in inch pounds.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INCH_3D">
				<xs:annotation>
					<xs:documentation>
            A point in space identified by X, Y, and Z positions and represented
            by a space-delimited set of numbers each expressed in inches.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="KELVIN">
				<xs:annotation>
					<xs:documentation>
            A measurement of temperature.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="KILOWATT">
				<xs:annotation>
					<xs:documentation>
            A measurement in kilowatt.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="KILOWATT_HOUR">
				<xs:annotation>
					<xs:documentation>
            Kilowatt hours which is 3.6 mega joules.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LITER">
				<xs:annotation>
					<xs:documentation>
            Measurement of volume of a fluid.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LITER/MINUTE">
				<xs:annotation>
					<xs:documentation>
            Measurement of rate of flow of a fluid.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER/MINUTE">
				<xs:annotation>
					<xs:documentation>
            Velocity in millimeters per minute.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MINUTE">
				<xs:annotation>
					<xs:documentation>
            A measurement of time in minutes.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OTHER">
				<xs:annotation>
					<xs:documentation>
            Unsupported units.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="POUND">
				<xs:annotation>
					<xs:documentation>
            US pounds.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="POUND/INCH^2">
				<xs:annotation>
					<xs:documentation>
            Pressure in pounds per square inch (PSI).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="RADIAN">
				<xs:annotation>
					<xs:documentation>
            Angle in radians.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="RADIAN/MINUTE">
				<xs:annotation>
					<xs:documentation>
            Velocity in radians per minute.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="RADIAN/SECOND">
				<xs:annotation>
					<xs:documentation>
            Rotational acceleration in radian per second squared.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="RADIAN/SECOND^2">
				<xs:annotation>
					<xs:documentation>
            Rotational acceleration in radian per second squared.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="REVOLUTION/SECOND">
				<xs:annotation>
					<xs:documentation>
            Rotational velocity in revolution per second.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="BAR">
				<xs:annotation>
					<xs:documentation>
            Pressure in Bar.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TORR">
				<xs:annotation>
					<xs:documentation>
            Pressure in Torr.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MILLIMETER_MERCURY">
				<xs:annotation>
					<xs:documentation>
            Pressure in Millimeter of Mercury (mmHg).
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="PASCAL/MINUTE">
				<xs:annotation>
					<xs:documentation>
            Pascal per minute.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
		</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="NativeUnitsEnum NativeUnitsExtType"/>
	</xs:simpleType>
	<xs:simpleType name="CoordinateSystemEnumType">
		<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:annotation>
					<xs:documentation>
            An unchangeable coordinate system that has machine zero as its
            origin.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WORK">
				<xs:annotation>
					<xs:documentation>
            The coordinate system that represents the working area for a
            particular workpiece whose origin is shifted within the `MACHINE`
            coordinate system. If the `WORK` coordinates are not currently
            defined in the piece of equipment, the `MACHINE` coordinates will be
            used.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="DataItemResetValueExtType">
		<xs:annotation>
			<xs:documentation>
        Extended tyoe for The reset intervals
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:pattern value="[a-ln-z][a-z]+:[A-Z_0-9]+"/>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="DataItemResetValueEnum">
		<xs:annotation>
			<xs:documentation>
        The reset intervals
      </xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:enumeration value="ACTION_COMPLETE">
				<xs:annotation>
					<xs:documentation>
            The value of the {{term(Data Item)}} that is measuring an action or
            operation is to be reset upon completion of that action or
            operation.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ANNUAL">
				<xs:annotation>
					<xs:documentation>
            The value of the {{term(Data Item)}} is to be reset at the end of a
            12-month period.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="DAY">
				<xs:annotation>
					<xs:documentation>
            The value of the {{term(Data Item)}} is to be reset at the end of a
            24-hour period.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="LIFE">
				<xs:annotation>
					<xs:documentation>
            The value of the {{term(Data Item)}} is not reset and accumulates
            for the entire life of the piece of equipment.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MAINTENANCE">
				<xs:annotation>
					<xs:documentation>
            The value of the {{term(Data Item)}} is to be reset upon completion
            of a maintenance event.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="MONTH">
				<xs:annotation>
					<xs:documentation>
            The value of the {{term(Data Item)}} is to be reset at the end of a
            monthly period.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="POWER_ON">
				<xs:annotation>
					<xs:documentation>
            The value of the {{term(Data Item)}} is to be reset when power was
            applied to the piece of equipment after a planned or unplanned
            interruption of power has occurred.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="SHIFT">
				<xs:annotation>
					<xs:documentation>
            The value of the {{term(Data Item)}} is to be reset at the end of a
            work shift.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="WEEK">
				<xs:annotation>
					<xs:documentation>
            The value of the {{term(Data Item)}} is to be reset at the end of a
            7-day period.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
		</xs:restriction>
	</xs:simpleType>
	<xs:simpleType name="DataItemResetValueType">
		<xs:annotation>
			<xs:documentation>
        The reset intervals
      </xs:documentation>
		</xs:annotation>
		<xs:union memberTypes="DataItemResetValueEnum DataItemResetValueExtType"/>
	</xs:simpleType>
	<xs:attributeGroup name="HeaderAttributesType">
		<xs:attribute name="version" type="VersionType" use="required">
			<xs:annotation>
				<xs:documentation>
          unique identifier of the administered item. {{cite(ISO/IEC
          11179-:2015)}}
        </xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name="creationTime" type="CreationTimeType" use="required">
			<xs:annotation>
				<xs:documentation>
          The time the file was created.
        </xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name="testIndicator" type="TestIndicatorType" use="optional">
			<xs:annotation>
				<xs:documentation>
          Indicates that this was a test document
        </xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name="instanceId" type="InstanceIdType" use="required">
			<xs:annotation>
				<xs:documentation>
          The unique instance identifier of this agent process
        </xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name="sender" type="SenderType" use="required">
			<xs:annotation>
				<xs:documentation>
          The sender of the message
        </xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name="deviceModelChangeTime" type="DeviceModelChangeTimeType" use="required">
			<xs:annotation>
				<xs:documentation>
          A timestamp in 8601 format of the last update of the Device
          information for any device
        </xs:documentation>
			</xs:annotation>
		</xs:attribute>
	</xs:attributeGroup>
	<xs:complexType name="HeaderType">
		<xs:annotation>
			<xs:documentation>
        Supplemental data usually placed at the beginning of a
        {{term(Document)}}.
      </xs:documentation>
		</xs:annotation>
		<xs:simpleContent>
			<xs:extension base="xs:string">
				<xs:attribute name="version" type="VersionType" use="required">
					<xs:annotation>
						<xs:documentation>
              unique identifier of the administered item. {{cite(ISO/IEC
              11179-:2015)}}
            </xs:documentation>
					</xs:annotation>
				</xs:attribute>
				<xs:attribute name="creationTime" type="CreationTimeType" use="required">
					<xs:annotation>
						<xs:documentation>
              The time the file was created.
            </xs:documentation>
					</xs:annotation>
				</xs:attribute>
				<xs:attribute name="testIndicator" type="TestIndicatorType" use="optional">
					<xs:annotation>
						<xs:documentation>
              Indicates that this was a test document
            </xs:documentation>
					</xs:annotation>
				</xs:attribute>
				<xs:attribute name="instanceId" type="InstanceIdType" use="required">
					<xs:annotation>
						<xs:documentation>
              The unique instance identifier of this agent process
            </xs:documentation>
					</xs:annotation>
				</xs:attribute>
				<xs:attribute name="sender" type="SenderType" use="required">
					<xs:annotation>
						<xs:documentation>
              The sender of the message
            </xs:documentation>
					</xs:annotation>
				</xs:attribute>
				<xs:attribute name="bufferSize" type="BufferSizeType" use="required">
					<xs:annotation>
						<xs:documentation>
              The size of the agent&apos;s buffer.
            </xs:documentation>
					</xs:annotation>
				</xs:attribute>
			</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>
            Supplemental data usually placed at the beginning of a
            {{term(Document)}}.
          </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:annotation>
					<xs:documentation>
            The request did not have sufficient permissions to perform the
            request.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="NO_DEVICE">
				<xs:annotation>
					<xs:documentation>
            The device specified in the URI could not be found.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="OUT_OF_RANGE">
				<xs:annotation>
					<xs:documentation>
            The sequence number was beyond the end of the buffer.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="TOO_MANY">
				<xs:annotation>
					<xs:documentation>
            The count given is too large.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INVALID_URI">
				<xs:annotation>
					<xs:documentation>
            The URI provided was incorrect.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INVALID_REQUEST">
				<xs:annotation>
					<xs:documentation>
            The request was not one of the three specified requests.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INTERNAL_ERROR">
				<xs:annotation>
					<xs:documentation>
            Contact the software provider, the agent did not behave correctly.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="INVALID_PATH">
				<xs:annotation>
					<xs:documentation>
            The xpath could not be parsed. Invalid syntax.
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="UNSUPPORTED">
				<xs:annotation>
					<xs:documentation>
            The request is not supported by this implementation
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
			<xs:enumeration value="ASSET_NOT_FOUND">
				<xs:annotation>
					<xs:documentation>
            The asset ID cannot be found
          </xs:documentation>
				</xs:annotation>
			</xs:enumeration>
		</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:annotation>
						<xs:documentation>
              The error code
            </xs:documentation>
					</xs:annotation>
				</xs:attribute>
			</xs:extension>
		</xs:simpleContent>
	</xs:complexType>
</xs:schema>