att.textStyle/@text.sizeProvides a default value for the font size of text (other than lyrics) when this
information is not provided on the individual elements.
att.typography/@fontsizeIndicates the size of a font expressed in printers' points, i.e., 1/72nd of an inch,
relative terms, e.g., "small", "larger", etc., or percentage values relative to "normal"
size, e.g., "125%".
att.mensural.vis/@mensur.sizeDescribes the relative size of the mensuration sign.