The limits · The visibility · Element
The reception
How customers react to the personalisation.
The part
What it is
Complaints, opt-outs and comments about it. All three are available and rarely aggregated.
A rise in opt-outs following a personalisation change is the clearest available signal that a line was crossed.
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.