The requirements

What must actually be done, in operational language.

The part

What it is

One obligation frequently produces several requirements, and one requirement can satisfy several obligations.

The language should be the organisation’s own rather than the regulation’s, or the requirement will not be recognised as describing existing work.

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.

Requirement
What must be done, in operational language.
Text shared type
From obligation
Which rule generates it.
Reference shared type
Frequency
How often, since a requirement without one is not performed.
Period shared type