: SY_ExternalPointComponenthttp://def.isotc211.org/iso19117/2012/ReusableSymbolComponentExtension# Create a prefix for http://def.isotc211.org/iso19117/2012/ReusableSymbolComponentExtension# Hit Enter to save Double click to create a prefix | rdfs:subClassOf | : SY_PointComponenthttp://def.isotc211.org/iso19117/2012/Symbol# Create a prefix for http://def.isotc211.org/iso19117/2012/Symbol# Hit Enter to save Double click to create a prefix | graph:default |