{"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":"3304025","name":"Buckingham"},"operator":{"type":"operator","id":"P22730","name":"Buckingham Mining & Reclamation"},"controller":{"type":"controller","id":"C02880","name":"James F  Graham"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P16964","name":"Buckingham Mining & Reclamation Inc"},"object":{"type":"mine","id":"3304025","name":"Buckingham"},"validFrom":"1985-08-01","validTo":"1994-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304025|P16964|1985-08-01|1994-03-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C11990","name":"Gary L  Allen"},"object":{"type":"mine","id":"3304025","name":"Buckingham"},"validFrom":"1985-08-01","validTo":"1994-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304025|C11990|1985-08-01|1994-03-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C11990","name":"Gary L  Allen"},"object":{"type":"operator","id":"P16964","name":"Buckingham Mining & Reclamation Inc"},"validFrom":"1985-08-01","validTo":"1994-03-31","current":false,"derived":true,"evidenceMineId":"3304025","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304025|P16964|1985-08-01|C11990|1985-08-01|85857"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22730","name":"Buckingham Mining & Reclamation"},"object":{"type":"mine","id":"3304025","name":"Buckingham"},"validFrom":"1994-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304025|P22730|1994-04-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02880","name":"James F  Graham"},"object":{"type":"mine","id":"3304025","name":"Buckingham"},"validFrom":"1994-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304025|C02880|1994-04-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02880","name":"James F  Graham"},"object":{"type":"operator","id":"P22730","name":"Buckingham Mining & Reclamation"},"validFrom":"1994-04-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"3304025","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304025|P22730|1994-04-01|C02880|1994-04-01|61086"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3304025","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"}}