{"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":"0201879","name":"Johnson Granite"},"operator":{"type":"operator","id":"L04190","name":"Johnson Granite"},"controller":{"type":"controller","id":"M03370","name":"Johnson Jim"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04189","name":"Thunderbird Granite Supply"},"object":{"type":"mine","id":"0201879","name":"Johnson Granite"},"validFrom":"1978-03-09","validTo":"1980-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201879|L04189|1978-03-09|1980-02-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03369","name":"Thunderbird Granite Supply"},"object":{"type":"mine","id":"0201879","name":"Johnson Granite"},"validFrom":"1978-03-09","validTo":"1980-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201879|M03369|1978-03-09|1980-02-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03369","name":"Thunderbird Granite Supply"},"object":{"type":"operator","id":"L04189","name":"Thunderbird Granite Supply"},"validFrom":"1978-03-09","validTo":"1980-02-28","current":false,"derived":true,"evidenceMineId":"0201879","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201879|L04189|1978-03-09|M03369|1978-03-09|128872"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04190","name":"Johnson Granite"},"object":{"type":"mine","id":"0201879","name":"Johnson Granite"},"validFrom":"1980-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201879|L04190|1980-03-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03370","name":"Johnson Jim"},"object":{"type":"mine","id":"0201879","name":"Johnson Granite"},"validFrom":"1980-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201879|M03370|1980-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03370","name":"Johnson Jim"},"object":{"type":"operator","id":"L04190","name":"Johnson Granite"},"validFrom":"1980-03-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0201879","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0201879|L04190|1980-03-01|M03370|1980-03-01|128873"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0201879","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"}}