<simpleType name="GoverningSpecificationSourceEnumType">
  <restriction base="string">
    <enumeration value="owner or agency provisions">
      <annotation>
        <documentation>The governing specification is the provisions of the project owner or of a public agency, for example the special provisions of a state transportation agency for rigid inclusions.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="contractor specifications">
      <annotation>
        <documentation>The governing specification is the contractor's own submitted specification, rather than one issued by the owner or a public agency.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="none">
      <annotation>
        <documentation>No formal specification governs the work.</documentation>
      </annotation>
    </enumeration>
  </restriction>
</simpleType>