Tooling · The tool inventory · Element
The tools
Each system in use, with what it is for and who owns it.
The part
What it is
Purpose should be stated as the job it does rather than as its product category, because that is what makes overlaps visible.
Ownership is the field that is usually blank, and its absence is why tools persist after the team that bought them has moved on.
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.