Entwurf oder Ausarbeitung? Die Quellen zu Anton Weberns "Streichquartett" (1905)

The distinction and possible tensions between the written score and a performance of a work is a medial characteristic of so called western art music. Furthermore "music" can be written down with regard to several functions, e.g. to sketch a compositional idea or to serve as a performance score. But different kinds of (written) musical sources do not always function in a categorized way that would allow a clear distinction for instance between "draft" and "elaboration", but are often interrelated in a much more complex manner that hints among other things at the processual character of composition. In a first part of this paper the various surviving sources to Webern's String Quartet (1905) are described in this respect. In a second part an analysis of a certain compositional detail (concerning the conception of the quartet as a sonata form) is proposed that refers to some observations in the sketches and the "Form-Entwurf".