Due to differences in the legal systems and business environments, it is difficult to compare the process of buying and selling land in different European countries. Illustrated by a range of European case studies, this book identifies and discusses the problems of this and similar comparisons. It then examines how ontological modelling can be applied to real estate transactions and advocates this as a basis for comparing the various processes used across Europe. The book consists of four parts: the economic, legal and ontological aspects of real property transactions; a discussion of the current situation in different countries, thus showing the heterogeneity and complexity of processes that have to be captured; whilst the third and fourth parts describe ontological modelling and its benefits for the purpose of understanding the nature of real property transactions together with examples of modelling techniques applied to cadastre and real property.