The derived

The other holders, and how they relate.

The part

What it is

Marked as derived so that a difference is read as an expected lag rather than as an error.

A derived copy that is edited independently is not derived, and that situation should be found and stopped.

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.

Derived system
Which copy this is.
Text shared type
Lag
How far behind the authoritative source it runs.
Duration shared type
Editable
Whether it can be changed independently, which breaks the relationship.
Choice shared type