staff

Law 9 specific->general, nearest kind: no notational-element kind exists on the board between staff and the framework, so musical-notation is the nearest accepted kind and no rung is skipped (precheck clear). The court has already accepted clef INSTANCE_OF musical-notation, establishing that notational elements instantiate the notation framework in this cluster; the staff is the same class of element — the frame of lines-and-spaces — not the framework itself, which is the whole symbolic system mapping acoustic parameters to marks. Pinned sense: staff as a notational structure (its accepted definition's carve), not the paper it is printed on. Direction: specific (staff) -> general (musical-notation).

Law 8b removal test in the pinned sense: the note's definition states that 'the notehead's position on a line or space of the staff determines its pitch relative to the clef' — both of the note's defining parameters are read off the staff: pitch from position, and its bar-total function from the bar delimited on the staff. Remove the staff now and the note loses the reference frame that makes it a written pitch: there is no line or space for the notehead to occupy, and the clef that keys it is a glyph defined relative to staff positions with no frame left to key, so the note stops operating as a written pitch. The reverse fails: a staff without notes still operates as a frame. Asymmetric, structural coupling. Direction: dependent (note) -> determiner (staff).

Law 8b removal test in the pinned sense: the accepted definition carves the clef as the glyph that 'encodes a mapping between staff positions (lines and spaces) and musical pitches' and 'establishes the reference pitch from which all other notes on that staff are read.' Remove the staff and the clef stops OPERATING — there are no staff positions left to map and no frame whose reference pitch it could fix; a clef is a key for a specific lock, and without the lock it does nothing. The reverse fails: remove the clef and the staff still operates as a frame (positions exist, simply unkeyed). A structural coupling, not a generic framework appeal — the clef's function is defined relative to the staff's geometry. Direction: dependent (clef) -> determiner (staff).

Removal test: fermata is a glyph placed above a note/chord/rest on the staff. Without the staff frame, the note loses its pitch reference and the fermata loses its positional anchor; the glyph stops operating as a notational instruction. Staff without fermata still operates as frame.

Law 8c part-of test: sheet music as a human-made document bearing a musical score is composed of staves as its structural frame. Removing staff from the document leaves a page with no notation frame — the score cannot be read as music, the document stops operating as sheet music. Removing the document does not stop staff operating as a notational structure in other contexts. Asymmetric part-of. Direction: whole (sheet-music) -> part (staff).

Law 8b removal test in the pinned sense: the rest is filed and defined as a glyph 'placed on a line or space of the staff' at the beat position it occupies within the bar — its entire notational function (marking where and for how long sound is absent) is defined relative to the staff's lines and spaces. Remove the staff now and the rest loses its position: there is no line or space for it to sit on and no bar delimited for it to complete, so the rest as a notational glyph stops operating. The reverse fails: a staff without rests still operates as a frame (a bar can be filled entirely with notes). Asymmetric, structural coupling. Direction: dependent (rest) -> determiner (staff).

Removal test: barline is a vertical mark drawn across the staff. Without the staff frame, the barline has no lines to span and no bar boundaries to delimit; it stops operating as a notational mark. Staff without barline still operates as frame.