{"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":"2103751","name":"Mesabi Metallics Company LLC"},"operator":{"type":"operator","id":"0121831","name":"Mesabi Metallics Company LLC"},"controller":{"type":"controller","id":"0102805","name":"Essar Minerals Canada Limited"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0121831","name":"Mesabi Metallics Company LLC"},"object":{"type":"mine","id":"2103751","name":"Mesabi Metallics Company LLC"},"validFrom":"2012-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103751|0121831|2012-03-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0102805","name":"Essar Minerals Canada Limited"},"object":{"type":"mine","id":"2103751","name":"Mesabi Metallics Company LLC"},"validFrom":"2012-03-01","validTo":"2017-12-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103751|0102805|2012-03-01|2017-12-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0102805","name":"Essar Minerals Canada Limited"},"object":{"type":"operator","id":"0121831","name":"Mesabi Metallics Company LLC"},"validFrom":"2012-03-01","validTo":"2017-12-21","current":false,"derived":true,"evidenceMineId":"2103751","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103751|0121831|2012-03-01|0102805|2012-03-01|17665"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0139803","name":"Chippewa Capital Partners, LLC"},"object":{"type":"mine","id":"2103751","name":"Mesabi Metallics Company LLC"},"validFrom":"2017-12-22","validTo":"2025-01-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103751|0139803|2017-12-22|2025-01-20"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0139803","name":"Chippewa Capital Partners, LLC"},"object":{"type":"operator","id":"0121831","name":"Mesabi Metallics Company LLC"},"validFrom":"2017-12-22","validTo":"2025-01-20","current":false,"derived":true,"evidenceMineId":"2103751","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103751|0121831|2012-03-01|0139803|2017-12-22|28327"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0102805","name":"Essar Minerals Canada Limited"},"object":{"type":"mine","id":"2103751","name":"Mesabi Metallics Company LLC"},"validFrom":"2025-01-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103751|0102805|2025-01-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0102805","name":"Essar Minerals Canada Limited"},"object":{"type":"operator","id":"0121831","name":"Mesabi Metallics Company LLC"},"validFrom":"2025-01-21","validTo":null,"current":true,"derived":true,"evidenceMineId":"2103751","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2103751|0121831|2012-03-01|0102805|2025-01-21|17666"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2103751","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"}}