:
http://def.isotc211.org/iso19109/2015/GeneralFeatureModel#
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Operation.signature
http://def.isotc211.org/iso19109/2015/GeneralFeatureModel#Operation.signature
skos:definition
http://www.w3.org/2004/02/skos/core#definition
Includes in and out parameters
graph:default-1
https://triplydb.com/iso/19109/graphs/default-1