The source

How the calendar was established.

The part

What it is

Customer conversations, sector regulation, published event calendars and observed demand patterns.

Observed demand is the cleanest check: when enquiries actually rise is when the audience is actually receptive.

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.

Source
Where the moment came from.
Source shared type
Observed demand
Whether enquiries actually rise at this point.
Measure shared type
Established
When the calendar was last built.
Date shared type