This text is designed for researchers and practitioners who seek to understand the trends and developments in information modelling. The state-of-the-art and state-of-the-practice of modelling methods and methodologies in information systems development should provide insights into developments in the third millennium. Other areas covered include foundations of information modelling, extended object-oriented modelling and Web information systems modelling. The work aims to address the gap between technical and business-oriented modelling approaches by providing an integrative view of modelling different facets of ICT and organizations.