{"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":"0101400","name":"Rock City Pit No 5"},"operator":{"type":"operator","id":"P14971","name":"Rock City Coal & Equipment Inc"},"controller":{"type":"controller","id":"C10805","name":"Webb Martin B"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P05589","name":"Sun-Up Coal Company Inc"},"object":{"type":"mine","id":"0101400","name":"Rock City Pit No 5"},"validFrom":"1975-08-15","validTo":"1983-10-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0101400|P05589|1975-08-15|1983-10-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04657","name":"Sun-Up Coal Company Inc"},"object":{"type":"mine","id":"0101400","name":"Rock City Pit No 5"},"validFrom":"1975-08-15","validTo":"1983-10-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0101400|C04657|1975-08-15|1983-10-16"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04657","name":"Sun-Up Coal Company Inc"},"object":{"type":"operator","id":"P05589","name":"Sun-Up Coal Company Inc"},"validFrom":"1975-08-15","validTo":"1983-10-16","current":false,"derived":true,"evidenceMineId":"0101400","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0101400|P05589|1975-08-15|C04657|1975-08-15|66398"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P14971","name":"Rock City Coal & Equipment Inc"},"object":{"type":"mine","id":"0101400","name":"Rock City Pit No 5"},"validFrom":"1983-10-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0101400|P14971|1983-10-17|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10805","name":"Webb Martin B"},"object":{"type":"mine","id":"0101400","name":"Rock City Pit No 5"},"validFrom":"1983-10-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0101400|C10805|1983-10-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10805","name":"Webb Martin B"},"object":{"type":"operator","id":"P14971","name":"Rock City Coal & Equipment Inc"},"validFrom":"1983-10-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"0101400","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0101400|P14971|1983-10-17|C10805|1983-10-17|82819"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0101400","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"}}