```json { "classifications": [ { "column": "team", "role": "attribute", "confidence": 0.95, "reason": "Team name is descriptive text displayed but not grouped; team_code serves as the identifier" }, { "column": "team_code", "role": "identifier", "confidence": 0.95, "reason": "Unique code per team (211 distinct values for 211 rows), serves as primary key for joining" }, { "column": "association", "role": "dimension", "confidence": 1.0, "reason": "Low cardinality (6 values) categorical field used to group/filter teams by confederation" }, { "column": "rank", "role": "measure", "confidence": 0.85, "reason": "Numeric ranking value that can be aggregated (avg rank by association) or compared; represents performance metric" }, { "column": "previous_rank", "role": "measure", "confidence": 0.85, "reason": "Numeric ranking value that can be aggregated or compared; represents historical performance metric" }, { "column": "points", "role": "measure", "confidence": 1.0, "reason": "Numeric quantity aggregated with sum/avg to analyze team performance" }, { "column": "previous_points", "role": "measure", "confidence": 1.0, "reason": "Numeric quantity aggregated with sum/avg to analyze historical team performance" } ] } ```