{"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":"0503544","name":"Hendrickson No 1 Pit"},"operator":{"type":"operator","id":"L04061","name":"Brown & Root Construction"},"controller":{"type":"controller","id":"M00854","name":"Halliburton Company"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04061","name":"Brown & Root Construction"},"object":{"type":"mine","id":"0503544","name":"Hendrickson No 1 Pit"},"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":"0503544|L04061|1980-03-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00854","name":"Halliburton Company"},"object":{"type":"mine","id":"0503544","name":"Hendrickson No 1 Pit"},"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":"0503544|M00854|1980-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00854","name":"Halliburton Company"},"object":{"type":"operator","id":"L04061","name":"Brown & Root Construction"},"validFrom":"1980-03-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0503544","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0503544|L04061|1980-03-01|M00854|1980-03-01|115380"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0503544","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"}}