{"data":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-13T11:19:05.459773+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"0900769","name":"Mayfield Mine"},"operator":{"type":"operator","id":"L09064","name":"Floridin Company"},"controller":{"type":"controller","id":"0047789","name":"Active Minerals Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00578","name":"Floridin Company"},"object":{"type":"mine","id":"0900769","name":"Mayfield Mine"},"validFrom":"1950-01-01","validTo":"1986-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900769|L00578|1950-01-01|1986-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00158","name":"ITT Corp"},"object":{"type":"mine","id":"0900769","name":"Mayfield Mine"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900769|M00158|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00158","name":"ITT Corp"},"object":{"type":"operator","id":"L00578","name":"Floridin Company"},"validFrom":"1950-01-01","validTo":"1986-12-31","current":false,"derived":true,"evidenceMineId":"0900769","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900769|L00578|1950-01-01|M00158|1950-01-01|105325"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09064","name":"Floridin Company"},"object":{"type":"mine","id":"0900769","name":"Mayfield Mine"},"validFrom":"1987-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900769|L09064|1987-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01812","name":"Rio Tinto Group"},"object":{"type":"mine","id":"0900769","name":"Mayfield Mine"},"validFrom":"1987-01-01","validTo":"2005-01-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900769|M01812|1987-01-01|2005-01-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01812","name":"Rio Tinto Group"},"object":{"type":"operator","id":"L09064","name":"Floridin Company"},"validFrom":"1987-01-01","validTo":"2005-01-19","current":false,"derived":true,"evidenceMineId":"0900769","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900769|L09064|1987-01-01|M01812|1987-01-01|121367"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0047789","name":"Active Minerals Inc"},"object":{"type":"mine","id":"0900769","name":"Mayfield Mine"},"validFrom":"2005-01-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900769|0047789|2005-01-20|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0047789","name":"Active Minerals Inc"},"object":{"type":"operator","id":"L09064","name":"Floridin Company"},"validFrom":"2005-01-20","validTo":null,"current":true,"derived":true,"evidenceMineId":"0900769","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0900769|L09064|1987-01-01|0047789|2005-01-20|5907"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0900769","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}