{"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":"3608051","name":"Brm No 1 Mine"},"operator":{"type":"operator","id":"P20851","name":"Joffre Coal & Construction Inc"},"controller":{"type":"controller","id":"C14120","name":"Brantner Melvin A"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19984","name":"Bituminous Resource Management Inc"},"object":{"type":"mine","id":"3608051","name":"Brm No 1 Mine"},"validFrom":"1988-10-01","validTo":"1989-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608051|P19984|1988-10-01|1989-11-13"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13655","name":"Kohl David C"},"object":{"type":"mine","id":"3608051","name":"Brm No 1 Mine"},"validFrom":"1988-10-01","validTo":"1989-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608051|C13655|1988-10-01|1989-11-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13655","name":"Kohl David C"},"object":{"type":"operator","id":"P19984","name":"Bituminous Resource Management Inc"},"validFrom":"1988-10-01","validTo":"1989-11-13","current":false,"derived":true,"evidenceMineId":"3608051","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608051|P19984|1988-10-01|C13655|1988-10-01|90716"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P20851","name":"Joffre Coal & Construction Inc"},"object":{"type":"mine","id":"3608051","name":"Brm No 1 Mine"},"validFrom":"1989-11-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608051|P20851|1989-11-14|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14120","name":"Brantner Melvin A"},"object":{"type":"mine","id":"3608051","name":"Brm No 1 Mine"},"validFrom":"1989-11-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608051|C14120|1989-11-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14120","name":"Brantner Melvin A"},"object":{"type":"operator","id":"P20851","name":"Joffre Coal & Construction Inc"},"validFrom":"1989-11-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"3608051","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608051|P20851|1989-11-14|C14120|1989-11-14|92064"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3608051","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"}}