UTF8 or UFT-8?

[Jo=?ISO-8859-1?B?6w==?=l Guillod]

The documentation is a bit confusing to me if the language uniEncode()
function should be "UTF8" or "UTF-8". The result is not the same... but is
of importance for the xml library.

Which one is the correct one? If both, please explain! Thanks.

Joel Guillod