Diagnosis · The evidence behind it · Element

The sources

What the diagnosis draws on.

The part

What it is

Sources range from a measured figure to a pattern someone noticed. Both can support a diagnosis; only one supports betting the year on it.

Marking which is which is more useful than the strength of any individual source.

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.