P. van Bommel received his masters degree in Computer Science in 1990, and the degree of Ph.D in Mathematics and Computer Science, from the University of Nijmegen, the Netherlands in 1995. He is currently assistant professor at the University of Nijmegen, the Netherlands. His main research interests include information modelling and information retrieval. PhD degree in Mathematics and Computer Science, University of Nijmegen, the Netherlands, 1995. Masters degree in Computer Science, University of Nijmegen, the Netherlands, 1990.