Title Page -- Contents -- Healthcare Information Systems Architecture -- Open Architecture for Health Care Systems: The European RICHE Experience -- A Federated Schema-Based Middleware Architecture for Hospital Information Systems -- Synapses in the Context of Healthcare Information Systems -- Comparison, Evaluation, and Possible Harmonisation of the HL7, DHE, and CORBA Middleware -- Hospital Information System Engineering Using the PROMISE Architecture -- Component Architecture in HIS: A Drug Order Entry Case Study -- Save Medical Personnel's Time by Improved User Interfaces -- Security Threats and Solutions in Distributed, Interoperable Health Information Systems Using Middleware -- Experiences with DHE: An Order Entry and Result Reporting Case Study -- The Management of Patients in a Hospital Information System Based on a Common Middleware: A Case-Study for the Al-Aural Cancer Centre -- Plug and Play Integration into a Healthcare Information System -- Extending the Standard Architecture for Healthcare Units: The Guideline Server -- Intranet Technology in Hospital Information Systems -- Evolution of the Intranet in the University Hospital of Gent -- Clinical Applications of Intranet-Technology -- Towards a Component Driven Infrastructure for Integrated Healthcare Systems -- ORBIS OpenMed Project: Technical Fundamentals -- Rapid Customizing to Evolving HIS Requirements Due to an Object Oriented Configuration Architecture -- First Do No Harm: A Standard for Electronic Communication in Healthcare -- Communication Standards: Problems and Future Trends -- The Role of Communication Servers in the Architecture of Healthcare Information Systems -- The Erlangen Hospital Communication Hub: Migration from Proprietary to Standardised Communication -- Experiences with DCE: The pro7 Communication Server Based on OSF-DCE Functionality