{"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":"4503487","name":"Evergreen Pit"},"operator":{"type":"operator","id":"L08424","name":"George Schmid & Sons Inc"},"controller":{"type":"controller","id":"M02556","name":"Emma  Schmid"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02556","name":"Emma  Schmid"},"object":{"type":"mine","id":"4503487","name":"Evergreen Pit"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4503487|M02556|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02556","name":"Emma  Schmid"},"object":{"type":"mine","id":"4503487","name":"Evergreen Pit"},"validFrom":"1985-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4503487|M02556|1985-07-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08748","name":"George Schmid Llc"},"object":{"type":"mine","id":"4503487","name":"Evergreen Pit"},"validFrom":"2001-07-01","validTo":"2002-03-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4503487|L08748|2001-07-01|2002-03-04"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02556","name":"Emma  Schmid"},"object":{"type":"operator","id":"L08748","name":"George Schmid Llc"},"validFrom":"2001-07-01","validTo":"2002-03-04","current":false,"derived":true,"evidenceMineId":"4503487","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4503487|L08748|2001-07-01|M02556|1985-07-01|125990"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08424","name":"George Schmid & Sons Inc"},"object":{"type":"mine","id":"4503487","name":"Evergreen Pit"},"validFrom":"2002-03-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4503487|L08424|2002-03-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02556","name":"Emma  Schmid"},"object":{"type":"operator","id":"L08424","name":"George Schmid & Sons Inc"},"validFrom":"2002-03-05","validTo":null,"current":true,"derived":true,"evidenceMineId":"4503487","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4503487|L08424|2002-03-05|M02556|1950-01-01|125987"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4503487","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"}}