<simpleType name="DirectionEnumType">
  <annotation>
    <documentation>The direction in which the stiffness, strength, tension or installed orientation of a geosynthetic is stated: machine, cross-machine, normal to the layer, or in the plane of the layer. Shared by the design value (diggs:DesignGeosyntheticLayerType/direction) and the as-built value (diggs:GeosyntheticType/direction), so that the stated orientation of an installed layer can be compared with the design value that governs it.</documentation>
  </annotation>
  <restriction base="string">
    <enumeration value="machine">
      <annotation>
        <documentation>The direction of manufacture (roll) of the geosynthetic.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="cross machine">
      <annotation>
        <documentation>The direction perpendicular to the machine direction.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="normal">
      <annotation>
        <documentation>Perpendicular to the plane of the layer, through its thickness.</documentation>
      </annotation>
    </enumeration>
    <enumeration value="planar">
      <annotation>
        <documentation>In the plane of the layer, without distinction between the machine and cross-machine directions.</documentation>
      </annotation>
    </enumeration>
  </restriction>
</simpleType>