<simpleType name="KnotTypesType">
  <annotation>
    <documentation>Defines allowed values for the knots` type. Uniform knots implies that all knots are of multiplicity 1 and they differ by a positive constant from the preceding knot. Knots are quasi-uniform iff they are of multiplicity (degree + 1) at the ends, of multiplicity 1 elsewhere, and they differ by a positive constant from the preceding knot.</documentation>
  </annotation>
  <restriction base="string">
    <enumeration value="uniform"/>
    <enumeration value="quasiUniform"/>
    <enumeration value="piecewiseBezier"/>
  </restriction>
</simpleType>