The competitor set · The review · Element
The changes
What was added or removed.
The part
What it is
Additions matter more than removals, because a set that only grows is a set nobody prunes and a set nobody prunes is not maintained.
Removals should be recorded with a reason, since a competitor that ceased to matter may return.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.