CREATE COLLATION german FROM eor USING
'[de][Latin]'
  -- 
  -- Umlaut before other diacritics (DIN 5007) 
  -- 
'&A#0332#<<#E4#<<<#C4#'
'&O#0332#<<#F6#<<<#D6#'
'&U#0332#<<#FC#<<<#DC#';