```xml <result> <column_name>duration_ms</column_name> <family>additive</family> <subtype>ordinal_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, mean, min, max, 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>min</inner_measure_reducer> <outer_measure_reducer>max</outer_measure_reducer> </inner_outer_measure> <multiplicative_partner_derivable>true</multiplicative_partner_derivable> <reasoning> Gate prior: PATH table with sequence axis allows both multiplicative and ordinal_additive. Column name "duration_ms" with unit "ms" (milliseconds) is a physical extensive quantity (time duration), strongly signaling additive family. The measure represents instantaneous duration at each sequence step on a PATH table - summing across entities at a fixed timestamp is meaningful, but summing along the sequence axis would be inappropriate (you don't add durations across time steps). Center far from 1.0 (mean=24434, median=545), large unbounded range (max=6.5M), and presence of zeros all confirm additive. High log_symmetry_gain (19.45) suggests log-normal distribution typical of durations, not multiplicative ratios. Classification: ordinal_additive because this is a physical level quantity on a PATH table where cross-entity aggregation uses sum but sequence-axis aggregation requires normalization. </reasoning> <table_type_conflict>false</table_type_conflict> </result> ```