KMenu: What does %u% do?

English Applications
#1

What does the term %u% do in the application shortcuts of the KMenu? I noticed that most application launch commands include it.

Thanks,

homoludens

#2

You need “%U” so you can load paths that are non-local files.

#3

Do you have a reference site for this so that I can read a bit more about it?

homoludens