{"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":"1507632","name":"No 2 Mine"},"operator":{"type":"operator","id":"P02503","name":"Joc Coal Mining Inc"},"controller":{"type":"controller","id":"C01547","name":"T W Oil Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02154","name":"Simpson James W"},"object":{"type":"mine","id":"1507632","name":"No 2 Mine"},"validFrom":"1973-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507632|C02154|1973-11-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02502","name":"Skyuka Mining Corp"},"object":{"type":"mine","id":"1507632","name":"No 2 Mine"},"validFrom":"1974-01-01","validTo":"1975-07-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507632|P02502|1974-01-01|1975-07-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02154","name":"Simpson James W"},"object":{"type":"operator","id":"P02502","name":"Skyuka Mining Corp"},"validFrom":"1974-01-01","validTo":"1975-07-30","current":false,"derived":true,"evidenceMineId":"1507632","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507632|P02502|1974-01-01|C02154|1973-11-01|57622"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01547","name":"T W Oil Inc"},"object":{"type":"mine","id":"1507632","name":"No 2 Mine"},"validFrom":"1975-07-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507632|C01547|1975-07-28|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02503","name":"Joc Coal Mining Inc"},"object":{"type":"mine","id":"1507632","name":"No 2 Mine"},"validFrom":"1975-07-31","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507632|P02503|1975-07-31|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01547","name":"T W Oil Inc"},"object":{"type":"operator","id":"P02503","name":"Joc Coal Mining Inc"},"validFrom":"1975-07-31","validTo":null,"current":true,"derived":true,"evidenceMineId":"1507632","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1507632|P02503|1975-07-31|C01547|1975-07-28|54737"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1507632","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"}}