```json { "classifications": [ { "column": "Rank", "role": "measure", "confidence": 0.85, "reason": "Numeric ranking position that can be aggregated (e.g., average rank over time)" }, { "column": "Previous", "role": "measure", "confidence": 0.85, "reason": "Previous ranking position, numeric value suitable for aggregation and comparison" }, { "column": "ID", "role": "identifier", "confidence": 0.99, "reason": "Unique player identifier with high cardinality (4980 distinct values), used to identify individual players" }, { "column": "Assoc", "role": "dimension", "confidence": 0.95, "reason": "Association/country code with medium cardinality (166 values), used for grouping and filtering" }, { "column": "Gender", "role": "dimension", "confidence": 0.99, "reason": "Categorical field with 3 distinct values, used for grouping and filtering" }, { "column": "Name", "role": "attribute", "confidence": 0.95, "reason": "Player name, descriptive text for display purposes, not used for grouping or aggregation" }, { "column": "Points", "role": "measure", "confidence": 0.99, "reason": "Numeric ranking points that are aggregated (sum, average) for analysis" }, { "column": "Previous Points", "role": "measure", "confidence": 0.99, "reason": "Previous period ranking points, numeric value suitable for aggregation and trend analysis" }, { "column": "WeekNum", "role": "dimension", "confidence": 0.95, "reason": "Week number with low cardinality (13 values), used for temporal grouping and filtering" }, { "column": "MonthNum", "role": "dimension", "confidence": 0.95, "reason": "Month number with low cardinality (13 values), used for temporal grouping and filtering" }, { "column": "YearNum", "role": "dimension", "confidence": 0.95, "reason": "Year with low cardinality (20 values), used for temporal grouping and filtering" } ] } ```