The <scaling> element
Parent element: <defaults>
Margins, page sizes, and distances are all measured in tenths to keep MusicXML data in a consistent coordinate system as much as possible. The translation to absolute units is done with the <scaling> element, which specifies how many millimeters are equal to how many tenths. For a staff height of 7 mm, <millimeters> would be set to 7 while <tenths> is set to 40. The ability to set a formula rather than a single scaling factor helps avoid roundoff errors.
In this order
This element is used in the following examples: