{"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":"4102515","name":"Galveston Grinding Plant"},"operator":{"type":"operator","id":"L13501","name":"M-I L L C"},"controller":{"type":"controller","id":"M10297","name":"Schlumberger Ltd"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05783","name":"Magcobar Minerals Division"},"object":{"type":"mine","id":"4102515","name":"Galveston Grinding Plant"},"validFrom":"1950-01-01","validTo":"1987-01-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102515|L05783|1950-01-01|1987-01-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00003","name":"Dresser Industries Inc"},"object":{"type":"mine","id":"4102515","name":"Galveston Grinding Plant"},"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":"4102515|M00003|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00003","name":"Dresser Industries Inc"},"object":{"type":"operator","id":"L05783","name":"Magcobar Minerals Division"},"validFrom":"1950-01-01","validTo":"1987-01-19","current":false,"derived":true,"evidenceMineId":"4102515","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102515|L05783|1950-01-01|M00003|1950-01-01|100503"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07332","name":"Halliburton Co et al"},"object":{"type":"mine","id":"4102515","name":"Galveston Grinding Plant"},"validFrom":"1987-01-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102515|M07332|1987-01-19|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09322","name":"M-I Drilling Fluids Company"},"object":{"type":"mine","id":"4102515","name":"Galveston Grinding Plant"},"validFrom":"1987-01-20","validTo":"1994-04-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102515|L09322|1987-01-20|1994-04-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07332","name":"Halliburton Co et al"},"object":{"type":"operator","id":"L09322","name":"M-I Drilling Fluids Company"},"validFrom":"1987-01-20","validTo":"1994-04-21","current":false,"derived":true,"evidenceMineId":"4102515","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102515|L09322|1987-01-20|M07332|1987-01-19|140801"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07332","name":"Dresser Industries Inc et al"},"object":{"type":"operator","id":"L09322","name":"M-I Drilling Fluids Company"},"validFrom":"1987-01-20","validTo":"1994-04-21","current":false,"derived":true,"evidenceMineId":"4102515","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102515|L09322|1987-01-20|M07332|1987-01-19|140802"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10297","name":"Schlumberger Ltd"},"object":{"type":"mine","id":"4102515","name":"Galveston Grinding Plant"},"validFrom":"1994-02-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102515|M10297|1994-02-28|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13501","name":"M-I L L C"},"object":{"type":"mine","id":"4102515","name":"Galveston Grinding Plant"},"validFrom":"1994-04-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102515|L13501|1994-04-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10297","name":"Schlumberger Ltd"},"object":{"type":"operator","id":"L13501","name":"M-I L L C"},"validFrom":"1994-04-22","validTo":null,"current":true,"derived":true,"evidenceMineId":"4102515","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4102515|L13501|1994-04-22|M10297|1994-02-28|148980"}}],"coverage":{"historyRecords":4,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4102515","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"}}