{"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":"2200508","name":"Smith Pit"},"operator":{"type":"operator","id":"L04817","name":"S & S Gravel Inc"},"controller":{"type":"controller","id":"M03892","name":"Huey  Stockstill; Richard  Stockstill"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04816","name":"J B Smith & Son Inc"},"object":{"type":"mine","id":"2200508","name":"Smith Pit"},"validFrom":"1979-09-01","validTo":"1980-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200508|L04816|1979-09-01|1980-06-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03891","name":"Smith J B"},"object":{"type":"mine","id":"2200508","name":"Smith Pit"},"validFrom":"1979-09-01","validTo":"1980-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200508|M03891|1979-09-01|1980-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03891","name":"Smith J B"},"object":{"type":"operator","id":"L04816","name":"J B Smith & Son Inc"},"validFrom":"1979-09-01","validTo":"1980-06-30","current":false,"derived":true,"evidenceMineId":"2200508","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200508|L04816|1979-09-01|M03891|1979-09-01|130363"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04817","name":"S & S Gravel Inc"},"object":{"type":"mine","id":"2200508","name":"Smith Pit"},"validFrom":"1980-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200508|L04817|1980-07-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03892","name":"Huey  Stockstill  et al"},"object":{"type":"mine","id":"2200508","name":"Smith Pit"},"validFrom":"1980-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200508|M03892|1980-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03892","name":"Huey  Stockstill  et al"},"object":{"type":"operator","id":"L04817","name":"S & S Gravel Inc"},"validFrom":"1980-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2200508","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200508|L04817|1980-07-01|M03892|1980-07-01|130368"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03892","name":"Richard  Stockstill  et al"},"object":{"type":"operator","id":"L04817","name":"S & S Gravel Inc"},"validFrom":"1980-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2200508","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2200508|L04817|1980-07-01|M03892|1980-07-01|130369"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2200508","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"}}