{"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":"4104139","name":"River City Ready Mix, Inc."},"operator":{"type":"operator","id":"L17795","name":"River City Ready Mix, Inc."},"controller":{"type":"controller","id":"M13576","name":"Art  Lopez"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17173","name":"Elizabeth Martinez"},"object":{"type":"mine","id":"4104139","name":"River City Ready Mix, Inc."},"validFrom":"2000-02-01","validTo":"2000-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104139|L17173|2000-02-01|2000-06-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13093","name":"Elizabeth E  Martinez"},"object":{"type":"mine","id":"4104139","name":"River City Ready Mix, Inc."},"validFrom":"2000-02-01","validTo":"2000-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104139|M13093|2000-02-01|2000-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13093","name":"Elizabeth E  Martinez"},"object":{"type":"operator","id":"L17173","name":"Elizabeth Martinez"},"validFrom":"2000-02-01","validTo":"2000-06-30","current":false,"derived":true,"evidenceMineId":"4104139","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104139|L17173|2000-02-01|M13093|2000-02-01|155506"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17795","name":"River City Ready Mix, Inc."},"object":{"type":"mine","id":"4104139","name":"River City Ready Mix, Inc."},"validFrom":"2000-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104139|L17795|2000-07-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13576","name":"Art  Lopez"},"object":{"type":"mine","id":"4104139","name":"River City Ready Mix, Inc."},"validFrom":"2000-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104139|M13576|2000-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13576","name":"Art  Lopez"},"object":{"type":"operator","id":"L17795","name":"River City Ready Mix, Inc."},"validFrom":"2000-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4104139","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104139|L17795|2000-07-01|M13576|2000-07-01|156568"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4104139","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"}}