Keeping it current · The explanation · Element
The account
What is said about the change.
The part
What it is
What changed, why, and what stayed the same. The last part is what carries continuity and is the part usually omitted.
Written once and used everywhere, so the explanation does not vary by who is asked.
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.