0 7 0 http://purl.obolibrary.org/obo/OPMI_0000580 measurement date 'measurement date' SubClassOf 'measurement time' http://purl.obolibrary.org/obo/OPMI_0000581 measurement datetime 'measurement datetime' SubClassOf 'measurement time' http://purl.obolibrary.org/obo/OPMI_0000579 measurement time 'measurement time' SubClassOf 'zero-dimensional temporal region' http://purl.obolibrary.org/obo/OPMI_0000577 observation period start date 'observation period start date' SubClassOf 'zero-dimensional temporal region' 'observation period start date' SubClassOf 'observation temporal region' http://purl.obolibrary.org/obo/OPMI_0000578 observation period end date 'observation period end date' SubClassOf 'zero-dimensional temporal region' 'observation period end date' SubClassOf 'observation temporal region' http://purl.obolibrary.org/obo/OPMI_0000575 observation period 'observation period' SubClassOf 'has part' some 'observation period end date' 'observation period' SubClassOf 'observation temporal region' 'observation period' SubClassOf 'one-dimensional temporal region' 'observation period' SubClassOf 'has part' some 'observation period start date' http://purl.obolibrary.org/obo/OPMI_0000576 observation temporal region 'observation temporal region' SubClassOf 'temporal region'