{"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":"2026-10-18T09:31:49.615908+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":"3606438","name":"Hoffman No 1"},"operator":{"type":"operator","id":"P19903","name":"Hoffman Mining Inc"},"controller":{"type":"controller","id":"C12771","name":"Donald R  Hoffman"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06502","name":"Yantus Coal Company"},"object":{"type":"mine","id":"3606438","name":"Hoffman No 1"},"validFrom":"1977-07-01","validTo":"1988-09-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3606438|P06502|1977-07-01|1988-09-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05398","name":"Yantus Steve"},"object":{"type":"mine","id":"3606438","name":"Hoffman No 1"},"validFrom":"1977-07-01","validTo":"1988-09-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3606438|C05398|1977-07-01|1988-09-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05398","name":"Yantus Steve"},"object":{"type":"operator","id":"P06502","name":"Yantus Coal Company"},"validFrom":"1977-07-01","validTo":"1988-09-08","current":false,"derived":true,"evidenceMineId":"3606438","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3606438|P06502|1977-07-01|C05398|1977-07-01|68714"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19903","name":"Hoffman Mining Inc"},"object":{"type":"mine","id":"3606438","name":"Hoffman No 1"},"validFrom":"1988-09-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3606438|P19903|1988-09-09|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12771","name":"Donald R  Hoffman"},"object":{"type":"mine","id":"3606438","name":"Hoffman No 1"},"validFrom":"1988-09-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3606438|C12771|1988-09-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12771","name":"Donald R  Hoffman"},"object":{"type":"operator","id":"P19903","name":"Hoffman Mining Inc"},"validFrom":"1988-09-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"3606438","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3606438|P19903|1988-09-09|C12771|1988-09-09|87905"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3606438","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}