{"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":"3600813","name":"David"},"operator":{"type":"operator","id":"P20158","name":"Canterbury Coal Company"},"controller":{"type":"controller","id":"C13408","name":"Robert E  Murray"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01564","name":"Canterbury Coal Company"},"object":{"type":"mine","id":"3600813","name":"David"},"validFrom":"1950-01-01","validTo":"1989-03-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3600813|P01564|1950-01-01|1989-03-09"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01306","name":"Canterra Coal Inc"},"object":{"type":"mine","id":"3600813","name":"David"},"validFrom":"1950-01-01","validTo":"1989-03-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3600813|C01306|1950-01-01|1989-03-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01306","name":"Canterra Coal Inc"},"object":{"type":"operator","id":"P01564","name":"Canterbury Coal Company"},"validFrom":"1950-01-01","validTo":"1989-03-09","current":false,"derived":true,"evidenceMineId":"3600813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3600813|P01564|1950-01-01|C01306|1950-01-01|53398"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P20158","name":"Canterbury Coal Company"},"object":{"type":"mine","id":"3600813","name":"David"},"validFrom":"1989-03-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3600813|P20158|1989-03-10|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13408","name":"Robert E  Murray"},"object":{"type":"mine","id":"3600813","name":"David"},"validFrom":"1989-03-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3600813|C13408|1989-03-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13408","name":"Robert E  Murray"},"object":{"type":"operator","id":"P20158","name":"Canterbury Coal Company"},"validFrom":"1989-03-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"3600813","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3600813|P20158|1989-03-10|C13408|1989-03-10|89533"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3600813","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"}}