```json { "classifications": [ { "column": "dataset_id", "role": "identifier", "confidence": 1.0, "reason": "Foreign key referencing a dataset; used for joining tables" }, { "column": "batch_id", "role": "identifier", "confidence": 1.0, "reason": "Unique identifier for a processing batch; used for tracking and joining" }, { "column": "bundle_hash", "role": "identifier", "confidence": 1.0, "reason": "Hash value serving as a unique identifier for a bundle" }, { "column": "brief_json", "role": "attribute", "confidence": 1.0, "reason": "Long-form JSON content containing descriptive analysis; displayed but not aggregated or grouped" }, { "column": "model", "role": "dimension", "confidence": 0.95, "reason": "Model name used for grouping/filtering analysis results by AI model" }, { "column": "generated_at", "role": "dimension", "confidence": 0.95, "reason": "Timestamp for filtering and grouping records by generation time" } ] } ```