{"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":"1510976","name":"Tapp Mine No 2"},"operator":{"type":"operator","id":"P08500","name":"Robkei'S Coal Reserves Inc"},"controller":{"type":"controller","id":"C06776","name":"Smith Robert E"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04210","name":"Tapp Tommy D"},"object":{"type":"mine","id":"1510976","name":"Tapp Mine No 2"},"validFrom":"1975-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510976|C04210|1975-05-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P05099","name":"Tapp Coal Company Inc"},"object":{"type":"mine","id":"1510976","name":"Tapp Mine No 2"},"validFrom":"1977-09-01","validTo":"1978-07-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510976|P05099|1977-09-01|1978-07-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04210","name":"Tapp Tommy D"},"object":{"type":"operator","id":"P05099","name":"Tapp Coal Company Inc"},"validFrom":"1977-09-01","validTo":"1978-07-19","current":false,"derived":true,"evidenceMineId":"1510976","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510976|P05099|1977-09-01|C04210|1975-05-01|65128"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P08500","name":"Robkei'S Coal Reserves Inc"},"object":{"type":"mine","id":"1510976","name":"Tapp Mine No 2"},"validFrom":"1978-07-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510976|P08500|1978-07-20|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06776","name":"Smith Robert E"},"object":{"type":"mine","id":"1510976","name":"Tapp Mine No 2"},"validFrom":"1978-07-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510976|C06776|1978-07-20|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06776","name":"Smith Robert E"},"object":{"type":"operator","id":"P08500","name":"Robkei'S Coal Reserves Inc"},"validFrom":"1978-07-20","validTo":null,"current":true,"derived":true,"evidenceMineId":"1510976","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510976|P08500|1978-07-20|C06776|1978-07-20|72916"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1510976","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"}}