<element name="maxLength" type="gml:LengthType">
	<annotation>
		<documentation>Areas of the surface where data is not 
  sufficiently dense to assure reasonable calculation shall be    
  removed by adding a retention criterion for triangles based 
  on the length of their sides. For many triangle sides  
  exceeding maximum length, the adjacent triangles to that 
  triangle side shall be removed from the surface.</documentation>
	</annotation>
</element>