<simpleType name="CurveInterpolationType">
  <annotation>
    <documentation>gml:CurveInterpolationType is a list of codes that may be used to identify the interpolation mechanisms specified by an application schema.</documentation>
  </annotation>
  <restriction base="string">
    <enumeration value="linear"/>
    <enumeration value="geodesic"/>
    <enumeration value="circularArc3Points"/>
    <enumeration value="circularArc2PointWithBulge"/>
    <enumeration value="circularArcCenterPointWithRadius"/>
    <enumeration value="elliptical"/>
    <enumeration value="clothoid"/>
    <enumeration value="conic"/>
    <enumeration value="polynomialSpline"/>
    <enumeration value="cubicSpline"/>
    <enumeration value="rationalSpline"/>
  </restriction>
</simpleType>