The window · The opening · Element
The durability
Whether the cause is temporary.
The part
What it is
Some causes resolve — an incumbent recovers, a shortage ends. Others are permanent shifts that opened a category rather than a window.
The distinction determines whether urgency is justified.
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.