{"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":"4800155","name":"Tata Chemicals Mine"},"operator":{"type":"operator","id":"L11009","name":"Tata Chemicals Soda Ash Partners LLC"},"controller":{"type":"controller","id":"0081153","name":"Tata Chemicals Ltd"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08224","name":"General Chemical Corp"},"object":{"type":"mine","id":"4800155","name":"Tata Chemicals Mine"},"validFrom":"1950-01-01","validTo":"1989-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4800155|L08224|1950-01-01|1989-06-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00011","name":"Allied-Signal Inc"},"object":{"type":"mine","id":"4800155","name":"Tata Chemicals Mine"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4800155|M00011|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00011","name":"Allied-Signal Inc"},"object":{"type":"operator","id":"L08224","name":"General Chemical Corp"},"validFrom":"1950-01-01","validTo":"1989-06-30","current":false,"derived":true,"evidenceMineId":"4800155","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4800155|L08224|1950-01-01|M00011|1950-01-01|101312"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11009","name":"Tata Chemicals Soda Ash Partners LLC"},"object":{"type":"mine","id":"4800155","name":"Tata Chemicals Mine"},"validFrom":"1989-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4800155|L11009|1989-07-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08522","name":"General Chemical  et al"},"object":{"type":"mine","id":"4800155","name":"Tata Chemicals Mine"},"validFrom":"1989-07-01","validTo":"2008-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4800155|M08522|1989-07-01|2008-03-31"}},{"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 LLC"},"validFrom":"1989-07-01","validTo":"2008-03-31","current":false,"derived":true,"evidenceMineId":"4800155","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4800155|L11009|1989-07-01|M08522|1989-07-01|143599"}},{"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 LLC"},"validFrom":"1989-07-01","validTo":"2008-03-31","current":false,"derived":true,"evidenceMineId":"4800155","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4800155|L11009|1989-07-01|M08522|1989-07-01|143600"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0081153","name":"Tata Chemicals Ltd"},"object":{"type":"mine","id":"4800155","name":"Tata Chemicals Mine"},"validFrom":"2008-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4800155|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 LLC"},"validFrom":"2008-04-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4800155","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4800155|L11009|1989-07-01|0081153|2008-04-01|12914"}}],"coverage":{"historyRecords":4,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4800155","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"}}