Retention and deletion · The schedule · Element
The periods
How long each type is held.
The part
What it is
Per data type rather than per system, since the same system holds data with very different retention requirements.
A single organisation-wide period is simple and is wrong for most of the data it covers.
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.