Schema version this record is written at; see REFERENCE_PROFILE_VERSION.
The analysed span.
The piece's meter across the analysed span.
Sections, phrases and the hypermetric grouping they sit in.
Keys, structural harmony, and harmonic rhythm.
Register, contour, motifs and their derivations, and melodic rhythm.
A structural fingerprint of a piece, recovered from its notes and held without the notes themselves.