The calendar · The plan · Element
The slots
What is scheduled, and who owns each one.
The part
What it is
Each slot carries a pillar as well as a date, so that the distribution is visible while it is still a plan rather than only afterwards in the audit.
An owner is a person, not a team. A slot owned by a department is owned by nobody in the week it matters.
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.