Schema version this record is written at; see COMPOSITION_PLAN_VERSION.
The project seed a generator following this plan draws from.
The algorithm version a generator following this plan runs under.
Keys the piece passes through; index 0 is the home key harmony is read against by default.
The piece's meter across the planned span.
The planned span.
Sections, in time order.
Phrases, in time order.
The harmonic progression, as a partition of the span.
Motifs and how they derive from one another.
The rhythmic target a generator's onset placement aims for.
What a new piece is going to be: its keys, meter and span, the sections and phrases it is built from, the harmony and motif derivations a generator fills those phrases with, and the rhythmic target it aims for.