E.8.ECSPF:10 - Rationale

The split between A.19.ECS and E.8.ECSPF preserves the distinction between an evaluation characteristic-space specification, the pattern that teaches its use, a later evaluation, and the resulting record. A.19.ECS says what the specification must contain. E.8.ECSPF says how to carry that accepted content into an FPF pattern when durable publication is selected. This prevents two symmetric mistakes: stuffing FPF pattern-format requirements into a general characteristic-space construction method, and publishing guidance whose accepted coordinate set is not recoverable by value.