What is personalised · The benefit · Element
The maintenance
What keeping the variant current costs.
The part
What it is
Every variant is content to update, logic to maintain and a case to test. The cost is continuous and rarely set against the benefit.
A variant with a small benefit and a permanent maintenance cost is a candidate for removal.
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.