The Point2dSimpleType is an array of two double values used to represent a 2D point. The first entry in the list is the X value and the second entry is the Y value.
<xs:simpleType name="Point2dSimpleType"><xs:annotation><xs:documentation>The Point2dSimpleType is an array of two double values used to represent a 2D point. The first entry in the list is the X value and the second entry is the Y value.</xs:documentation></xs:annotation><xs:restriction base="ListDoubleType"><xs:length value="2"/></xs:restriction></xs:simpleType>