{"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":"2302543","name":"Joplin Quarry"},"operator":{"type":"operator","id":"L36549","name":"Mulberry Limestone Quarry Co., Inc."},"controller":{"type":"controller","id":"M36549","name":"Matt  Blessant"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M36549","name":"Matt  Blessant"},"object":{"type":"mine","id":"2302543","name":"Joplin Quarry"},"validFrom":"1991-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302543|M36549|1991-11-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L36549","name":"Mulberry Limestone Quarry Co., Inc."},"object":{"type":"mine","id":"2302543","name":"Joplin Quarry"},"validFrom":"2020-06-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302543|L36549|2020-06-08|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M36549","name":"Matt  Blessant"},"object":{"type":"operator","id":"L36549","name":"Mulberry Limestone Quarry Co., Inc."},"validFrom":"2020-06-08","validTo":null,"current":true,"derived":true,"evidenceMineId":"2302543","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2302543|L36549|2020-06-08|M36549|1991-11-01|165674"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2302543","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"}}