Controversial areas in (music) manuscripts?

Content form and media type

• Where may the indication that it is a manuscript be placed?

Drafting area

• Intended for manuscripts of the same content,
  presenting different drafting states
  or declaring a drafting state?

Production, manifacture, etc. area

• Contains the statement of where, by whom and when
  a manuscript was produced, i.e. written (and/or assembled?)
• May contain the statement of autograph or copy?

Multipart monographic resource area

• Used for composite manuscripts

Resource identifier area

• May contain music (and text) incipit