The cadence · The rhythm · Element

The frequency

How often each thing goes out.

The part

What it is

Stated per channel and format rather than as a single organisational number, which fits nothing.

The day and time matter for some channels and not for others; where they matter, holding them is part of the rhythm.

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.