{"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":"2026-10-17T05:35:58.500035+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":"4801044","name":"Pso Mine N0 1"},"operator":{"type":"operator","id":"P23278","name":"E H Oftedal & Sons Inc"},"controller":{"type":"controller","id":"C15327","name":"Oftedal W T"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03645","name":"Ash Creek Mining Company"},"object":{"type":"mine","id":"4801044","name":"Pso Mine N0 1"},"validFrom":"1976-01-01","validTo":"1995-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801044|P03645|1976-01-01|1995-07-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00995","name":"Central & South West"},"object":{"type":"mine","id":"4801044","name":"Pso Mine N0 1"},"validFrom":"1976-01-01","validTo":"1995-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801044|C00995|1976-01-01|1995-07-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00995","name":"Central & South West"},"object":{"type":"operator","id":"P03645","name":"Ash Creek Mining Company"},"validFrom":"1976-01-01","validTo":"1995-07-31","current":false,"derived":true,"evidenceMineId":"4801044","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801044|P03645|1976-01-01|C00995|1976-01-01|51566"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23278","name":"E H Oftedal & Sons Inc"},"object":{"type":"mine","id":"4801044","name":"Pso Mine N0 1"},"validFrom":"1995-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801044|P23278|1995-08-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15327","name":"Oftedal W T"},"object":{"type":"mine","id":"4801044","name":"Pso Mine N0 1"},"validFrom":"1995-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801044|C15327|1995-08-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15327","name":"Oftedal W T"},"object":{"type":"operator","id":"P23278","name":"E H Oftedal & Sons Inc"},"validFrom":"1995-08-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4801044","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801044|P23278|1995-08-01|C15327|1995-08-01|95325"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4801044","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}