<simpleType name="PileShapeEnumType">
  <annotation>
    <documentation>List of possible pile shapes.</documentation>
  </annotation>
  <restriction base="string">
    <enumeration value="circular closed">
      <annotation>
        <documentation>A circular pile with a closed cross section.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="circular open">
      <annotation>
        <documentation>A circular pile with an open cross section.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="hexagonal">
      <annotation>
        <documentation>A pile with a hexagonal cross section.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="octagonal">
      <annotation>
        <documentation>A pile with an octagonal cross section.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="square hollow">
      <annotation>
        <documentation>A square pile with a hollow cross section.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="square solid">
      <annotation>
        <documentation>A square pile with a solid cross section.</documentation>
      </annotation>
    </enumeration>
  </restriction>
</simpleType>