{"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":"0405296","name":"BLUE ROCK QUARRY"},"operator":{"type":"operator","id":"L14820","name":"Blue Rock Quarry"},"controller":{"type":"controller","id":"M11273","name":"Bob  Ford; Rob  Ford"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14820","name":"Blue Rock Quarry"},"object":{"type":"mine","id":"0405296","name":"BLUE ROCK QUARRY"},"validFrom":"1996-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405296|L14820|1996-10-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11273","name":"Rob  Ford  et al"},"object":{"type":"mine","id":"0405296","name":"BLUE ROCK QUARRY"},"validFrom":"1996-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405296|M11273|1996-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11273","name":"Rob  Ford  et al"},"object":{"type":"operator","id":"L14820","name":"Blue Rock Quarry"},"validFrom":"1996-10-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0405296","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405296|L14820|1996-10-01|M11273|1996-10-01|151075"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11273","name":"Bob  Ford  et al"},"object":{"type":"operator","id":"L14820","name":"Blue Rock Quarry"},"validFrom":"1996-10-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0405296","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405296|L14820|1996-10-01|M11273|1996-10-01|151076"}}],"coverage":{"historyRecords":2,"edgeCount":4,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0405296","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"}}