River. British rivers http://www.britannia.com/maps/mapfram2.html has_instance River_thames. has_part River_stretch. has_property Water_flow. has_type Braided_river. is_bigger_than Stream. is_part_of Inland_waterways. Lower river Clay_aggregate. Middle river Sand_aggregate. next_to Flood_basin. River basin toolkit http://www.geodata.soton.ac.uk/geodataweb/technologies/web/?link=project.php&id=108 Upper river Stone_aggregate.       Vr.155, Dec 2010     Readme      ..