```json { "classifications": [ { "column": "jobs_id", "role": "identifier", "confidence": 1.0, "reason": "Foreign key referencing jobs table; used for joining" }, { "column": "chart_id", "role": "identifier", "confidence": 0.95, "reason": "Low cardinality (7 distinct) code identifying chart type; acts as chart key" }, { "column": "title", "role": "attribute", "confidence": 0.9, "reason": "Descriptive display name for charts; corresponds 1:1 with chart_id" }, { "column": "caption", "role": "attribute", "confidence": 1.0, "reason": "Long-form descriptive text for display; not grouped or aggregated" }, { "column": "section_id", "role": "dimension", "confidence": 0.5, "reason": "100% null but name suggests categorical grouping field; would be dimension if populated" }, { "column": "bytes", "role": "measure", "confidence": 1.0, "reason": "Numeric quantity (file size) suitable for aggregation (sum/avg)" }, { "column": "width", "role": "measure", "confidence": 0.7, "reason": "100% null but name suggests numeric dimension measurement; would be measure if populated" }, { "column": "height", "role": "measure", "confidence": 0.7, "reason": "100% null but name suggests numeric dimension measurement; would be measure if populated" } ] } ```