The story · The narrative · Element
The origin
Where the story starts.
The part
What it is
A specific moment rather than a founding year. “Two people in a room” is a date; the problem that put them there is a story.
Origins are worth verifying, because founding stories accumulate embellishment over time and someone who was there will eventually be asked.
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.