<element name="breakLines" type="gml:LineStringSegmentArrayPropertyType" minOccurs="0" maxOccurs="unbounded">
	<annotation>
		<documentation>Breaklines are lines of a critical
  nature to the shape of the surface, representing local
  ridges, or depressions (such as drainage lines) in the
  surface. As such their constituent segments must be
  included in the tin eve if doing so
  violates the Delauny criterion. Break lines contains these
  critical segments as a set of line strings.</documentation>
	</annotation>
</element>