{"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":"3401341","name":"M And H Mine No 2"},"operator":{"type":"operator","id":"L06600","name":"Clayton Cement Company"},"controller":{"type":"controller","id":"M05257","name":"Kirkes John"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05619","name":"D & H Materials"},"object":{"type":"mine","id":"3401341","name":"M And H Mine No 2"},"validFrom":"1981-09-01","validTo":"1983-06-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401341|L05619|1981-09-01|1983-06-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04538","name":"Huddleston Don"},"object":{"type":"mine","id":"3401341","name":"M And H Mine No 2"},"validFrom":"1981-09-01","validTo":"1983-06-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401341|M04538|1981-09-01|1983-06-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04538","name":"Huddleston Don"},"object":{"type":"operator","id":"L05619","name":"D & H Materials"},"validFrom":"1981-09-01","validTo":"1983-06-08","current":false,"derived":true,"evidenceMineId":"3401341","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401341|L05619|1981-09-01|M04538|1981-09-01|132195"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06600","name":"Clayton Cement Company"},"object":{"type":"mine","id":"3401341","name":"M And H Mine No 2"},"validFrom":"1983-06-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401341|L06600|1983-06-09|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05257","name":"Kirkes John"},"object":{"type":"mine","id":"3401341","name":"M And H Mine No 2"},"validFrom":"1983-06-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401341|M05257|1983-06-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05257","name":"Kirkes John"},"object":{"type":"operator","id":"L06600","name":"Clayton Cement Company"},"validFrom":"1983-06-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"3401341","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401341|L06600|1983-06-09|M05257|1983-06-09|134035"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3401341","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"}}