{"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":"4801497","name":"Tata Chemicals Mill"},"operator":{"type":"operator","id":"L11009","name":"Tata Chemicals (Soda Ash) Partners"},"controller":{"type":"controller","id":"0081153","name":"Tata Chemicals Ltd"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08522","name":"General Chemical  et al"},"object":{"type":"mine","id":"4801497","name":"Tata Chemicals Mill"},"validFrom":"1989-07-01","validTo":"2008-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801497|M08522|1989-07-01|2008-03-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11009","name":"Tata Chemicals (Soda Ash) Partners"},"object":{"type":"mine","id":"4801497","name":"Tata Chemicals Mill"},"validFrom":"1990-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801497|L11009|1990-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08522","name":"General Chemical  et al"},"object":{"type":"operator","id":"L11009","name":"Tata Chemicals (Soda Ash) Partners"},"validFrom":"1990-07-01","validTo":"2008-03-31","current":false,"derived":true,"evidenceMineId":"4801497","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801497|L11009|1990-07-01|M08522|1989-07-01|143566"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08522","name":"Andover Group  et al"},"object":{"type":"operator","id":"L11009","name":"Tata Chemicals (Soda Ash) Partners"},"validFrom":"1990-07-01","validTo":"2008-03-31","current":false,"derived":true,"evidenceMineId":"4801497","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801497|L11009|1990-07-01|M08522|1989-07-01|143567"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0081153","name":"Tata Chemicals Ltd"},"object":{"type":"mine","id":"4801497","name":"Tata Chemicals Mill"},"validFrom":"2008-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801497|0081153|2008-04-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0081153","name":"Tata Chemicals Ltd"},"object":{"type":"operator","id":"L11009","name":"Tata Chemicals (Soda Ash) Partners"},"validFrom":"2008-04-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4801497","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4801497|L11009|1990-07-01|0081153|2008-04-01|12914"}}],"coverage":{"historyRecords":3,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4801497","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"}}