Fixed points · The assumed-fixed · Element
The candidates
Which dates have no external authority behind them.
The part
What it is
Internal budget dates, planning cycles, review rounds, product release windows and annual events.
Found by asking of each fixed date who fixed it, and noticing where the answer is that it has always been then.
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.