Rundkanzone
Rundkanzone is a type of bar form originally taken from medieval German song, but also used to describe musical form in general. The form is represented by either:
ABAB/CB
-or-
AABA
The second part concludes with most or all of the material from each half of the double first part .
German terms are retained in the discussion of bar form by music scholars because the terms were introduced by Lorenz in his exhaustive investigation of the music of 19th-century composer Richard Wagner.