Original: Mahler's thematic motif "der kleine Appell" ("call to order") from his Fourth and Fifth Symphonies is similarly notated. In his Symphony No. 4 (first movement) it is in D minor, but in his Symphony No. 5 it is in C minor.
Simplified: For example, Mahler's thematic motif "der kleine Appell" ("call to order") from his Fourth and Fifth Symphonies is written in D minor in Symphony No. 4, but in his Symphony No. 5 it is in C minor.