{"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":"1302139","name":"Portable Rock Plant #1"},"operator":{"type":"operator","id":"L00211","name":"Martin Marietta Corp"},"controller":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"1302139","name":"Portable Rock Plant #1"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302139|M00174|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00655","name":"Larry E  Moore"},"object":{"type":"mine","id":"1302139","name":"Portable Rock Plant #1"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302139|M00655|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00792","name":"Midwest Limestone Company Inc"},"object":{"type":"mine","id":"1302139","name":"Portable Rock Plant #1"},"validFrom":"1986-03-01","validTo":"1992-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302139|L00792|1986-03-01|1992-05-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00655","name":"Larry E  Moore"},"object":{"type":"operator","id":"L00792","name":"Midwest Limestone Company Inc"},"validFrom":"1986-03-01","validTo":"1992-05-31","current":false,"derived":true,"evidenceMineId":"1302139","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302139|L00792|1986-03-01|M00655|1950-01-01|113862"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00211","name":"Martin Marietta Corp"},"object":{"type":"mine","id":"1302139","name":"Portable Rock Plant #1"},"validFrom":"1992-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302139|L00211|1992-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L00211","name":"Martin Marietta Corp"},"validFrom":"1992-06-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1302139","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1302139|L00211|1992-06-01|M00174|1950-01-01|105859"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1302139","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"}}