{"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":"2003184","name":"OZARK"},"operator":{"type":"operator","id":"L18076","name":"Lechner Construction"},"controller":{"type":"controller","id":"M13792","name":"John  Lechner"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L18076","name":"Lechner Construction"},"object":{"type":"mine","id":"2003184","name":"OZARK"},"validFrom":"2001-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2003184|L18076|2001-03-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13792","name":"John  Lechner"},"object":{"type":"mine","id":"2003184","name":"OZARK"},"validFrom":"2001-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2003184|M13792|2001-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13792","name":"John  Lechner"},"object":{"type":"operator","id":"L18076","name":"Lechner Construction"},"validFrom":"2001-03-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2003184","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2003184|L18076|2001-03-01|M13792|2001-03-01|157105"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2003184","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"}}