calcMode

<xs:attribute name="calcMode" default="linear">
  <xs:simpleType>
    <xs:restriction base="xs:token">
      <xs:enumeration value="discrete"/>
      <xs:enumeration value="linear"/>
      <xs:enumeration value="paced"/>
      <xs:enumeration value="spline"/>
    </xs:restriction>
  </xs:simpleType>
</xs:attribute>