What is personalised · The maintenance · Element
The failures
What has gone wrong in a variant.
The part
What it is
Broken personalisation is usually discovered by a customer, since nobody is looking at that combination.
The record is worth keeping, because it says how much of the experience is unmonitored.
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.