The development of serial composition was the task of composers during the middle of the twentieth century. After Schoenberg, much innovation moved from Germany to France, where students of influential French composer and teacher Olivier Messiaen expanded Serial concepts. Two significant proponents of Serialism were Pierre Boulez and Karlheinz Stockhausen, both drawing inspiration from the "parameterization" of Messiaen. They conceived of taking the structure of 12 tone technique, and expanding on Anton Webern's compositional style, placing all elements of music under the control of a unique "series". So instead of merely having "rows" of tones, which Webern would also associate with dynamics and attack, they proposed that each feature be serialized. While the Second Vienna School did not use the term "serial" to describe their music, it was applied to their work by later theorists and composers.