COMPUTER SCIENCE AND INFORMATION SYSTEMS REPORTS Technical Reports TR-21 Proceedings of the 22nd Information Systems Research Seminar in Scandinavia (IRIS 22): "Enterprise Architectures for Virtual Organisations" 7-10 August, 1999 Keuruu, Finland Volume 1 Edited by Timo K. Käkölä UNIVERSITY OF JYVÄSKYLÄ DEPARTMENT OF COMPUTER SCIENCE AND INFORMATION SYSTEMS 1999