{"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":"1601023","name":"Davis Sand & Gravel Inc"},"operator":{"type":"operator","id":"L14351","name":"Davis Sand & Gravel Inc"},"controller":{"type":"controller","id":"M10963","name":"Alvin V  Davis"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L35025","name":"Joshlin'S Sand & Gravel"},"object":{"type":"mine","id":"1601023","name":"Davis Sand & Gravel Inc"},"validFrom":"1982-05-01","validTo":"1995-08-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1601023|L35025|1982-05-01|1995-08-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M35025","name":"Darrel  Joshlin"},"object":{"type":"mine","id":"1601023","name":"Davis Sand & Gravel Inc"},"validFrom":"1982-05-01","validTo":"1995-08-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1601023|M35025|1982-05-01|1995-08-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M35025","name":"Darrel  Joshlin"},"object":{"type":"operator","id":"L35025","name":"Joshlin'S Sand & Gravel"},"validFrom":"1982-05-01","validTo":"1995-08-01","current":false,"derived":true,"evidenceMineId":"1601023","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1601023|L35025|1982-05-01|M35025|1982-05-01|163928"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14351","name":"Davis Sand & Gravel Inc"},"object":{"type":"mine","id":"1601023","name":"Davis Sand & Gravel Inc"},"validFrom":"1995-08-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1601023|L14351|1995-08-02|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10963","name":"Alvin V  Davis"},"object":{"type":"mine","id":"1601023","name":"Davis Sand & Gravel Inc"},"validFrom":"1995-08-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1601023|M10963|1995-08-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10963","name":"Alvin V  Davis"},"object":{"type":"operator","id":"L14351","name":"Davis Sand & Gravel Inc"},"validFrom":"1995-08-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"1601023","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1601023|L14351|1995-08-02|M10963|1995-08-02|150366"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1601023","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"}}