What is personalised · The inventory · Element
The variants
How many versions exist.
The part
What it is
Two variants is manageable; twenty is a combinatorial problem where most combinations have never been seen by anyone.
The count determines how much of the experience has actually been reviewed.
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.