Copyright notice ================ The copyright holder of the proceedings is the editorial board of the RISC-Linz Report Series. Permission to make copies and printouts is granted provided the title page "proc/cover.ps" is also copied/printed. The copyright holder of the electronic distribution is Gernot Salzer, salzer@logic.at. You are allowed to use the archive as described in the file README, but you may modify neither files nor the structure of the distribution.