The profile · The situation · Element
The current solution
What they do about the problem today.
The part
What it is
The incumbent, the workaround, or nothing. This is what any offer has to displace and it is the real competitor.
How satisfied they are with it matters more than what it is: a tolerated solution is much harder to displace than a resented one.
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.