{"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":"0502819","name":"Mcginley No 2"},"operator":{"type":"operator","id":"P02246","name":"Mc Ginley Coal & Energy"},"controller":{"type":"controller","id":"C01919","name":"Mc Ginley Coal & Energy"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02247","name":"Eagle Head Coal Co"},"object":{"type":"mine","id":"0502819","name":"Mcginley No 2"},"validFrom":"1975-01-01","validTo":"1975-12-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0502819|P02247|1975-01-01|1975-12-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01920","name":"Downing Lawrence"},"object":{"type":"mine","id":"0502819","name":"Mcginley No 2"},"validFrom":"1975-01-01","validTo":"1975-12-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0502819|C01920|1975-01-01|1975-12-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01920","name":"Downing Lawrence"},"object":{"type":"operator","id":"P02247","name":"Eagle Head Coal Co"},"validFrom":"1975-01-01","validTo":"1975-12-22","current":false,"derived":true,"evidenceMineId":"0502819","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0502819|P02247|1975-01-01|C01920|1975-01-01|56814"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02246","name":"Mc Ginley Coal & Energy"},"object":{"type":"mine","id":"0502819","name":"Mcginley No 2"},"validFrom":"1975-12-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0502819|P02246|1975-12-23|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01919","name":"Mc Ginley Coal & Energy"},"object":{"type":"mine","id":"0502819","name":"Mcginley No 2"},"validFrom":"1975-12-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0502819|C01919|1975-12-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01919","name":"Mc Ginley Coal & Energy"},"object":{"type":"operator","id":"P02246","name":"Mc Ginley Coal & Energy"},"validFrom":"1975-12-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"0502819","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0502819|P02246|1975-12-23|C01919|1975-12-23|56813"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0502819","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"}}