Inland_waterways.
association Fresh_water.
association House_boat.
association Surface_water.
association Topography.
has_part Canal
has_part Dam
has_part Estuary.
has_part Flood_basin.
has_part Lake.
has_part Pond.
has_part River.
has_part Spring.
has_part Stream.
has_part Tarn.
has_part Weir
is_type_of Geography.
Ontology structure Relation.
Water quality ../conservation/water_quality.
   
 
Vr.155, Dec 2009     Readme      List of Objects Queries: obromley@hotmail.com