{"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":"2026-10-17T05:35:58.500035+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":"1502301","name":"Wisco No 1 Mine"},"operator":{"type":"operator","id":"P14886","name":"D S Yellow Creek Corp"},"controller":{"type":"controller","id":"C08600","name":"Diamond Shamrock Corp"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04031","name":"Pioneer Coal Company Inc"},"object":{"type":"mine","id":"1502301","name":"Wisco No 1 Mine"},"validFrom":"1950-01-01","validTo":"1983-07-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1502301|P04031|1950-01-01|1983-07-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00886","name":"Cmp Coal Company Inc"},"object":{"type":"mine","id":"1502301","name":"Wisco No 1 Mine"},"validFrom":"1950-01-01","validTo":"1983-07-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1502301|C00886|1950-01-01|1983-07-18"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00886","name":"Cmp Coal Company Inc"},"object":{"type":"operator","id":"P04031","name":"Pioneer Coal Company Inc"},"validFrom":"1950-01-01","validTo":"1983-07-18","current":false,"derived":true,"evidenceMineId":"1502301","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1502301|P04031|1950-01-01|C00886|1950-01-01|50923"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P14886","name":"D S Yellow Creek Corp"},"object":{"type":"mine","id":"1502301","name":"Wisco No 1 Mine"},"validFrom":"1983-07-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1502301|P14886|1983-07-19|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08600","name":"Diamond Shamrock Corp"},"object":{"type":"mine","id":"1502301","name":"Wisco No 1 Mine"},"validFrom":"1983-07-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1502301|C08600|1983-07-19|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08600","name":"Diamond Shamrock Corp"},"object":{"type":"operator","id":"P14886","name":"D S Yellow Creek Corp"},"validFrom":"1983-07-19","validTo":null,"current":true,"derived":true,"evidenceMineId":"1502301","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1502301|P14886|1983-07-19|C08600|1983-07-19|77795"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1502301","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}