A.1.1:2 - Problem
DDD bounded-context practice couples several real concerns: a model is defined and applicable within a boundary; actual systems in assigned roles use it; code and descriptions contain expressions of it; integration and maintenance work aims to keep those expressions consistent; and maps describe relationships among model uses. These are practical prompts to recover exact FPF claims, not evidence that maintenance caused coherence or that a described crossing obtains. Their objects are related, but they are not parts of one additional whole by that fact.
FPF needs this joint model-use relation organization selectable as U.Structure so it can serve as EntityOfConcern for comparison and maintenance work without becoming a heterogeneous holon, a description, or one universal semantic-locality reference.