The cadence · The floor · Element
The minimum
What continues no matter what.
The part
What it is
Usually one format on one channel at a reduced frequency. Small enough to be genuinely deliverable in the worst month.
The floor should be modest enough that nobody has ever had to think about whether to hold it.
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.