<simpleType name="PlateBearingTestStiffnessEnumType">
  <restriction base="string">
    <enumeration value="rigid">
      <annotation>
        <documentation>The plate is stiff enough, relative to the ground or platform it bears on, that it distributes load essentially uniformly and does not itself deflect appreciably under test load. The standard steel plate used in ASTM D1195/D1196 and DIN 18134.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="flexible">
      <annotation>
        <documentation>The plate deflects appreciably under test load, so the bearing pressure it transmits is not uniform across its area.</documentation>
      </annotation>
    </enumeration>
  </restriction>
</simpleType>