{"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":"0400357","name":"Yosemite Slate Quarry"},"operator":{"type":"operator","id":"0123570","name":"Mariposa Yosemite Slate Quarry"},"controller":{"type":"controller","id":"0105013","name":"David R  Butler"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L01481","name":"Mariposa Flagstone Company"},"object":{"type":"mine","id":"0400357","name":"Yosemite Slate Quarry"},"validFrom":"1950-01-01","validTo":"1996-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400357|L01481|1950-01-01|1996-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01325","name":"Fritz H  Grau"},"object":{"type":"mine","id":"0400357","name":"Yosemite Slate Quarry"},"validFrom":"1950-01-01","validTo":"1996-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400357|M01325|1950-01-01|1996-12-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01325","name":"Fritz H  Grau"},"object":{"type":"operator","id":"L01481","name":"Mariposa Flagstone Company"},"validFrom":"1950-01-01","validTo":"1996-12-31","current":false,"derived":true,"evidenceMineId":"0400357","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400357|L01481|1950-01-01|M01325|1950-01-01|117997"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15541","name":"Mariposa Flagstone Company"},"object":{"type":"mine","id":"0400357","name":"Yosemite Slate Quarry"},"validFrom":"1997-01-01","validTo":"2012-06-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400357|L15541|1997-01-01|2012-06-05"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11854","name":"Ted C  Verceles"},"object":{"type":"mine","id":"0400357","name":"Yosemite Slate Quarry"},"validFrom":"1997-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400357|M11854|1997-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11854","name":"Ted C  Verceles"},"object":{"type":"operator","id":"L15541","name":"Mariposa Flagstone Company"},"validFrom":"1997-01-01","validTo":"2012-06-05","current":false,"derived":true,"evidenceMineId":"0400357","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400357|L15541|1997-01-01|M11854|1997-01-01|152601"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0123570","name":"Mariposa Yosemite Slate Quarry"},"object":{"type":"mine","id":"0400357","name":"Yosemite Slate Quarry"},"validFrom":"2012-06-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400357|0123570|2012-06-06|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0105013","name":"David R  Butler"},"object":{"type":"mine","id":"0400357","name":"Yosemite Slate Quarry"},"validFrom":"2012-06-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400357|0105013|2012-06-06|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0105013","name":"David R  Butler"},"object":{"type":"operator","id":"0123570","name":"Mariposa Yosemite Slate Quarry"},"validFrom":"2012-06-06","validTo":null,"current":true,"derived":true,"evidenceMineId":"0400357","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0400357|0123570|2012-06-06|0105013|2012-06-06|18360"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0400357","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"}}