sensu This annotation property defines a "sensu", which is the combination of a bibliographic reference, a label and a class (represented by verbatim and logical definitions). Given this model, independent observations can be inferred across to compute synonymy (multiple labels attached to one), homonymy (one label attached to multiple classes). Yoder MJ, Mikó I, Seltmann KC, Bertone MA, Deans AR (2010) A Gross Anatomy Ontology for Hymenoptera. PLOS ONE 5: e15991. https://doi.org/10.1371/journal.pone.0015991.g004 This annotation property is on the label of a class in owl. subset_property