{"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":"4700045","name":"Oakfield Quarry"},"operator":{"type":"operator","id":"L04448","name":"Oakfield Stone Company, Inc."},"controller":{"type":"controller","id":"0140121","name":"Shirley  Rademann"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04448","name":"Oakfield Stone Company Inc"},"object":{"type":"mine","id":"4700045","name":"Oakfield Quarry"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700045|L04448|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03586","name":"Bruce  Rademann"},"object":{"type":"mine","id":"4700045","name":"Oakfield Quarry"},"validFrom":"1950-01-01","validTo":"2017-08-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700045|M03586|1950-01-01|2017-08-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03586","name":"Bruce  Rademann"},"object":{"type":"operator","id":"L04448","name":"Oakfield Stone Company Inc"},"validFrom":"1950-01-01","validTo":"2017-08-25","current":false,"derived":true,"evidenceMineId":"4700045","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700045|L04448|1950-01-01|M03586|1950-01-01|129423"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0140121","name":"Shirley  Rademann"},"object":{"type":"mine","id":"4700045","name":"Oakfield Quarry"},"validFrom":"2017-08-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700045|0140121|2017-08-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0140121","name":"Shirley  Rademann"},"object":{"type":"operator","id":"L04448","name":"Oakfield Stone Company Inc"},"validFrom":"2017-08-26","validTo":null,"current":true,"derived":true,"evidenceMineId":"4700045","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700045|L04448|1950-01-01|0140121|2017-08-26|28371"}}],"coverage":{"historyRecords":2,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4700045","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"}}