voiceOne and oneVoice

[Kira Garvie]

Hello all!
I realize this is a pretty basic question... but what is the
difference between voiceOne and oneVoice? I am writing a multivoice
keyboard-style hymn (as opposed to SATB chorale style) and the directions
say to switch between oneVoice and voiceOne as needed for stem direction...
"(d) Add voiceOne and oneVoice tags throughout to indicate stem direction.
If
there is no separately stemmed second part at the first note, oneVoice is
assumed."
Do I need to give an example?
Thank you!
Kira