Channel conflict · The boundaries · Element
The edge cases
Customers the rule does not clearly assign.
The part
What it is
A customer growing across a size boundary, one operating in two geographies, one buying two product lines.
These recur, and deciding a few in advance produces precedents that handle the rest.
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.