[ACM Press the 2008 annual research conference of the South African Institute of Computer Scientists and Information Technologists - Wilderness, South Africa (2008.10.06-2008.10.08)] Proceedings of the 2008 annual research conference of the South African Institute of Computer Scientists and Information Technologists on IT research in developing countries riding the wave of technology - SAICSIT '08 - An analysis of representations for hyper-heuristics for the uncapacitated examination timetabling problem in a genetic programming system