{"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":"2026-10-17T05:35:58.500035+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":"4503551","name":"Westside Trucking-Ray Road Pit"},"operator":{"type":"operator","id":"0051538","name":"Westside Trucking"},"controller":{"type":"controller","id":"0042111","name":"John J  Bredfield"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051538","name":"Westside Trucking"},"object":{"type":"mine","id":"4503551","name":"Westside Trucking-Ray Road Pit"},"validFrom":"2003-09-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503551|0051538|2003-09-12|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0042111","name":"John J  Bredfield"},"object":{"type":"mine","id":"4503551","name":"Westside Trucking-Ray Road Pit"},"validFrom":"2003-09-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503551|0042111|2003-09-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0042111","name":"John J  Bredfield"},"object":{"type":"operator","id":"0051538","name":"Westside Trucking"},"validFrom":"2003-09-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"4503551","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503551|0051538|2003-09-12|0042111|2003-09-12|3675"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4503551","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}