Segmentation · The basis · Element
The variable
What the segmentation divides on.
The part
What it is
Behaviour, need, situation, value or description. The first four predict; the last is the one usually available.
A combination is normal and should still name a primary variable, or the segmentation cannot be maintained.
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.