hy-p:HydroOrderCode.orderScheme
http://inspire.ec.europa.eu/ont/hy-p#HydroOrderCode.orderScheme
rdfs:comment
http://www.w3.org/2000/01/rdf-schema#comment
EXAMPLE Strahler, Horton, Pfaffstetter etc.
@en
graph:default
https://triplydb.com/inspire/hy-p/graphs/default