<xs:simpleType name="TubularAssembly">
  <xs:annotation>
    <xs:documentation>Specifies the type (or purpose) of the tubular assembly.</xs:documentation>
  </xs:annotation>
  <xs:restriction base="eml:TypeEnum">
    <xs:enumeration value="drilling"/>
    <xs:enumeration value="directional drilling"/>
    <xs:enumeration value="fishing"/>
    <xs:enumeration value="condition mud"/>
    <xs:enumeration value="tubing conveyed logging"/>
    <xs:enumeration value="cementing"/>
    <xs:enumeration value="casing"/>
    <xs:enumeration value="clean out"/>
    <xs:enumeration value="completion or testing"/>
    <xs:enumeration value="coring"/>
    <xs:enumeration value="hole opening or underreaming"/>
    <xs:enumeration value="milling or dressing or cutting"/>
    <xs:enumeration value="wiper or check or reaming"/>
    <xs:enumeration value="unknown">
      <xs:annotation>
        <xs:documentation>The value is not known. Avoid using this value. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>