The competitor set · The set · Element
The review
When the set was last drawn from evidence rather than assumed.
The part
What it is
Competitor sets age badly because new substitutes arrive from outside the industry, which is exactly where nobody is looking.
A set that has not changed in three years has almost certainly not been checked in three years.
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.