Verbal system · The tone of voice · Element

The rules

The specific constraints on how the brand writes.

The part

What it is

Sentence length, person, contractions, jargon, how the organisation refers to itself and to customers. Each of these is decided or drifts.

Rules should be few and checkable. A style guide nobody can hold in mind is applied by nobody.

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.