Scope note: This property generalises the notions of "copy of" and "similar to" into a dynamic, asymmetric relationship, where the domain expresses the derivative, if such a direction can be established. Otherwise, the relationship is symmetric. It is a short-cut of P15 was influenced by (influenced) in a creation or production, if such a reason for the similarity can be verified. Moreover it expresses similarity in cases that can be stated between two objects only, without historical knowledge about its reasons. Examples: - the Parthenon Frieze on the Acropolis in Athens (E22) shows features of the Original Parthenon Frieze in the British museum (E22). Kind of similarity: Copy (E55)