Bay. graphic is_part_of Lake or Sea is_part_of Lake. is_part_of Sea. OS (PDF) http://www.ordnancesurvey.co.uk/oswebsite/partnerships/research/research/TerraCognita_Papers_Presentations/Dolbear%20Panel%20Presentation.pdf RDF. Bay SpatialRelations:hasRegion some (SpatialRelations:SpatialRegion and (SpatialRelations:t_spatiallyInside some (SpatialRelations:SpatialRegion and (SpatialRelations:isRegionOf some (Sea or Lake)))) and not ((SpatialRelations:t_spatiallyInside some (SpatialRelations:SpatialRegion and (SpatialRelations:isRegionOf some Sea))) and (SpatialRelations:t_spatiallyInside some (SpatialRelations:SpatialRegion and (SpatialRelations:isRegionOf some Lake)))))       Vr.155, Dec 2010     Readme      ..