```xml <result> <column_name>billable_output_tokens</column_name> <family>additive</family> <subtype>real_additive</subtype> <confidence>0.85</confidence> <requires_user_confirmation>false</requires_user_confirmation> <sum_meaningful>true</sum_meaningful> <signed>false</signed> <reducers> <primary_reducer>sum</primary_reducer> <valid_reducers>sum, min, max, mean, median, count, distribution</valid_reducers> <excluded_reducers>product (not a ratio), geomean (not a ratio)</excluded_reducers> <average_semantics>arithmetic_mean</average_semantics> </reducers> <inner_outer_measure> <inner_measure_reducer>sum</inner_measure_reducer> <outer_measure_reducer>sum</outer_measure_reducer> </inner_outer_measure> <multiplicative_partner_derivable>false</multiplicative_partner_derivable> <reasoning> Table type is DIMENSION with no sequence axis, making multiplicative highly implausible. Column name "billable_output_tokens" contains the strong additive token "tokens" (a count quantity), indicating an extensive measure that accumulates. The "billable_" prefix suggests this is a metered quantity where summing across entities is meaningful (total tokens consumed). No zeros or negatives detected, consistent with a non-negative count. The subtype is real_additive because tokens are a true extensive quantity where sum is the natural aggregation operation. </reasoning> <table_type_conflict>false</table_type_conflict> </result> ```