```json { "classifications": [ { "column": "Age", "role": "measure", "confidence": 0.9, "reason": "Numeric quantity typically aggregated (avg age, median age) in analytics" }, { "column": "Sex", "role": "dimension", "confidence": 1.0, "reason": "Categorical variable with 2 values, used to group and filter data" }, { "column": "Fare", "role": "measure", "confidence": 1.0, "reason": "Numeric price value aggregated with sum/avg in analysis" }, { "column": "Name", "role": "attribute", "confidence": 1.0, "reason": "Descriptive text displayed but not grouped or aggregated; unique per passenger" }, { "column": "Cabin", "role": "dimension", "confidence": 0.85, "reason": "Categorical cabin identifier used for grouping/filtering despite high null rate" }, { "column": "Parch", "role": "measure", "confidence": 0.9, "reason": "Count of parents/children aboard; numeric quantity aggregated (avg family size)" }, { "column": "SibSp", "role": "measure", "confidence": 0.9, "reason": "Count of siblings/spouses aboard; numeric quantity aggregated (avg family size)" }, { "column": "Pclass", "role": "dimension", "confidence": 1.0, "reason": "Low-cardinality categorical code (1st/2nd/3rd class) used to group and filter" }, { "column": "Ticket", "role": "identifier", "confidence": 0.95, "reason": "Ticket number used to identify passengers; high cardinality, never aggregated" }, { "column": "Embarked", "role": "dimension", "confidence": 1.0, "reason": "Categorical port code (C/Q/S) used to group and filter data" }, { "column": "Survived", "role": "dimension", "confidence": 0.95, "reason": "Binary flag (0/1) used to filter and group; outcome variable for analysis" }, { "column": "PassengerId", "role": "identifier", "confidence": 1.0, "reason": "Primary key with unique value per row; never aggregated" } ] } ```