The question · The decision · Element
The choice
What is actually being decided.
The part
What it is
Stated as options rather than as a topic. “Whether to continue investing in this channel” is a decision; “channel performance” is a subject.
Where the options are not yet known, defining them is the first piece of work rather than the analysis.
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.