0 4 0 http://purl.obolibrary.org/obo/DIDEO_00000126 ratio value specification 'ratio value specification' SubClassOf 'value specification' http://purl.obolibrary.org/obo/DIDEO_00000127 percentage value specification 'percentage value specification' SubClassOf 'ratio value specification' http://purl.obolibrary.org/obo/OBI_0001929 mass value specification 'mass value specification' SubClassOf 'scalar value specification' http://purl.obolibrary.org/obo/OBI_0001931 scalar value specification 'scalar value specification' SubClassOf 'value specification'