<simpleType name="ChannelDerivationEnumType">
  <restriction base="string">
    <enumeration value="raw">
      <annotation>
        <documentation>Raw measured data, directly from sensors.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="simulated">
      <annotation>
        <documentation>Data produced by simulation rather than measurement.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="spliced">
      <annotation>
        <documentation>Derived by splicing values from two or more other channels.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="sampled">
      <annotation>
        <documentation>Derived by sampling values from one or more other channels.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="model">
      <annotation>
        <documentation>Based on modeled results derived from the values in one or more other channels.</documentation>
      </annotation>
    </enumeration>
  </restriction>
</simpleType>