```xml <result> <column_name>cost_usd</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>sum</inner_measure_reducer> <outer_measure_reducer>sum</outer_measure_reducer> </inner_outer_measure> <multiplicative_partner_derivable>true</multiplicative_partner_derivable> <reasoning> PATH table with sequence axis allows full analysis. Column name "cost_usd" with currency unit strongly signals real_additive (extensive quantity). However, the small bounded magnitude (max 0.43), strictly non-negative values, and PATH context suggest this is an instantaneous cost rate or cost-per-step rather than a cumulative total. On a PATH table, instantaneous physical quantities are ordinal_additive - you sum across entities at each step but do not sum along the sequence axis (that would require integration/normalization). The presence of zeros (1.9%) and center far from 1.0 (mean 0.012, median 0.010) definitively rule out multiplicative. Assigning ordinal_additive with high confidence; sum is valid cross-entity, normalized reducers apply along sequence. </reasoning> <table_type_conflict>false</table_type_conflict> </result> ```