music_data record, music_data_type attributes.

Scalar values in the music_data table:

• divisions
• instruments
• staves
• arrangement
• system_relation

One-to-one relationships to records in other tables:

• editorial
• part_symbol

Many-to-one relationships, with foreign key attributes_id:

• time
• key_signature
• clef
• staff_details
• directive
• transpose
• for_part
• measure_style