Definitions and lineage · The change process · Element
The history
What happens to data reported under the old definition.
The part
What it is
Restated, or left with the break marked. Both are workable and doing neither is what creates a misleading chart.
The decision should be recorded with the change, since it is asked about later.
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.