Reuse and lifespan · The lifespan classification · Element
The spend rule
What each class is worth spending.
The part
What it is
Evergreen work justifies research, editing and production that topical work does not, because the cost is divided across years rather than days.
Without a stated rule, every piece is produced to the same standard, which overspends on the short-lived and underspends on the lasting.
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.
The other elements in the lifespan classification
The class
Which kind of lifespan the piece has.
LearnThe observed life
How long the piece actually stayed in use.
Learn