clef

A clef is designed and maintained for the sake of music — it enables readable musical notation, which serves music's performance, transmission, and study. Law 8d: servant(clef)→master(music).

A clef is a specific kind of musical-notation symbol — it specifies the pitch of written notes on the staff. Per Law 9: 'a clef is musical notation.' Direction: specific→general. Musical-notation exists and is ACCEPTED.

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).

Law 8c part-of test on the defined sense: sheet-music's accepted definition names the document's constituent marks explicitly — 'staves, notes, clefs, dynamic and articulation marks, and text — encode a musical work'. A clef, per its accepted definition, is 'a standardized notational glyph placed at the beginning of a musical staff' — literally ink on the page, a mark within the artifact. Pinned sense: the clef as an inscribed glyph of the printed score. Same constituent-mark family as the already-accepted sheet-music CONTAINS staff, note, and rest. Asymmetric: removing the document removes this clef's instance; the clef as a glyph operates on other sheets. Whole (sheet-music) -> part (clef).