Reason for being · The purpose statement · Element
Scope
Which entity the statement covers — the whole group, one company, one unit.
The part
What it is
A purpose without a stated scope is assumed to cover everything, which is rarely what was meant and never checked.
Where several entities each hold their own purpose, scope is what keeps them from being read as competing versions of one statement.
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.
Entity
Makes it possible for two units to hold different purposes without contradiction.
Entity shared type