XPP users know that there is a way to split a title in 2 lines and still have that same text come out in 1 line when it is called out in a folio.
You can do so by entering a [SHIFT][RETURN] and setting the appropriate quad mode.
But do you know how to enter this [SHIFT][RETURN] character into an XML instance that you want to import?
Probably you don't. You have to enter the following <?xpp @000a?> pi.
Sure there has to be a better way.
My preferred solution would be to enter a LF or CR as an entity: 
 or 
 (or of if you prefer the decimal way).
Unfortunately XPP does not allow character below 0x20 to be entered in XCS spec.
Example:
<title>Long title
split over 2 lines</title>