{"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":"0202191","name":"A G 42"},"operator":{"type":"operator","id":"L06978","name":"M M Sundt Construction Company"},"controller":{"type":"controller","id":"M05562","name":"Sundt Corp"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05562","name":"Sundt Corp"},"object":{"type":"mine","id":"0202191","name":"A G 42"},"validFrom":"1983-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0202191|M05562|1983-09-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06978","name":"M M Sundt Construction Company"},"object":{"type":"mine","id":"0202191","name":"A G 42"},"validFrom":"1984-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0202191|L06978|1984-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05562","name":"Sundt Corp"},"object":{"type":"operator","id":"L06978","name":"M M Sundt Construction Company"},"validFrom":"1984-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0202191","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0202191|L06978|1984-01-01|M05562|1983-09-01|134873"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0202191","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"}}