The governing chain
Source → Evidence → Rule → Decision → Review → Publication. Discovery alone never establishes a classification.
Classification boundary
ECS describes strategy structure and knowledge state. It does not rank funds, predict returns, or establish suitability.
Unknowns are results
When reviewed evidence cannot determine a value, ETFCTA publishes the bounded unknown rather than completing the record by inference.
Review
Every decision identifies its evidence, rule version, limitations, actors, and next review date.