The availability

Whether that evidence exists and where it sits.

The part

What it is

Sometimes it exists and is three clicks deep; sometimes it does not exist and is supplied verbally by whoever happens to be in the conversation.

The second is the more serious finding, because it means the journey depends on a person rather than on anything designed.

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.

Exists
Whether the evidence is available at all.
Choice shared type
Where
Where a buyer would find it.
Location shared type
Requires a person
Whether it only reaches buyers through a conversation.
Choice shared type