"Du calme" analysis

[AngledLuffa]

Is that "du" best analyzed as a DET? In the original French, it is almost always split into two separate words (admittedly, one of them is a DET)

# sent_id = en_lines-ud-dev-doc4-3625
# text = 'Du calme, du calme.
1       '       '       PUNCT   Quote   _       3       punct   _       SpaceAfter=No
2       Du      du      DET     FGN     _       3       det     _       _
3       calme   calme   NOUN    FGN     _       0       root    _       SpaceAfter=No
4       ,       ,       PUNCT   Comma   _       6       punct   _       _
5       du      du      DET     FGN     _       6       det     _       _
6       calme   calme   NOUN    FGN     _       3       conj    _       SpaceAfter=No
7       .       .       PUNCT   Period  _       3       punct   _       _