| Ian Horrocks | Frank van Harmelen | |
| Department of Computer Science | Division of Mathematics and Computer Science | |
| University of Manchester | Vrije Universiteit Amsterdam | |
| Oxford Road | de Boelelaan 1081a | |
| Manchester, M13 9PL | 1081HV Amsterdam | |
| UK | The Netherlands | |
| Tel: +44 161 275 6133 | Tel: (+31) - 20 - 444 7731/7700 | |
| Fax: +44 161 275 6204 | Fax: (+31) - 84 - 221 4294 | |
| Email: horrocks@cs.man.ac.uk | Email: Frank.van.Harmelen@cs.vu.nl | |
| URL: http://www.cs.man.ac.uk/~horrocks | URL: http://www.cs.vu.nl/~frankh/ |