<xs:simpleType name="ChannelState">
  <xs:annotation>
    <xs:documentation>Specifies the source of the data values in the channel, e.g., calculated from another source, or from archive, or raw real-time, etc.</xs:documentation>
  </xs:annotation>
  <xs:restriction base="eml:TypeEnum">
    <xs:enumeration value="calculated">
      <xs:annotation>
        <xs:documentation>Calculated from measurements</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="final">
      <xs:annotation>
        <xs:documentation>Considered final and not subject to change</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="memory">
      <xs:annotation>
        <xs:documentation>Sensor data is recorded into downhole memory of a tool, rather than transmitting in "real time" to surface.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="processed">
      <xs:annotation>
        <xs:documentation>Results of calculations based on measurements</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="real time">
      <xs:annotation>
        <xs:documentation>Measurements at the actual time.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>