This book constitutes the refereed joint proceedings of four international workshops held in conjunction with the 22nd International Conference on Conceptual Modelling, ER 2003, held in Chicago, IL, USA in October 2003.

Conceptual Modeling Approaches for E-Business at ER 2003 (eCOMO 2003).- Preface to eCOMO 2003.- Managing Evolving Business Workflows through the Capture of Descriptive Information.- The Benefits of Rapid Modelling for E-business System Development.- Prediction of Consumer Preference through Bayesian Classification and Generating Profile.- Developing Web Applications from Conceptual Models. A Web Services Approach.- A Framework for Business Rule Driven Web Service Composition.- Virtual Integration of the Tile Industry (VITI).- Second International Workshop on Conceptual Modeling Quality at ER 2003 (IWCMQ 2003).- Preface to IWCMQ 2003.- Multiperspective Evaluation of Reference Models – Towards a Framework.- On the Acceptability of Conceptual Design Models for Web Applications.- Consistency by Construction: The Case of MERODE.- Defining Metrics for UML Statechart Diagrams in a Methodological Way.- Visual SQL – High-Quality ER-Based Query Treatment.- Multidimensional Schemas Quality: Assessing and Balancing Analyzability and Simplicity.- Conceptual Modeling of Accounting Information Systems: A Comparative Study of REA and ER Diagrams.- Agent-Oriented Information Systems at ER 2003 (AOIS 2003).- Preface to AOIS 2003.- Bringing Multi-agent Systems into Human Organizations: Application to a Multi-agent Information System.- Reconciling Physical, Communicative, and Social/Institutional Domains in Agent Oriented Information Systems – A Unified Framework.- An Agent-Based Active Portal Framework.- Agent-Oriented Modeling and Agent-Based Simulation.- REF: A Practical Agent-Based Requirement Engineering Framework.- Patterns for Motivating an Agent-Based Approach.- Using Scenarios for Contextual Design in Agent-Oriented Information Systems.- Dynamic Matchmaking between Messagesand Services in Multi-agent Information Systems.- International Workshop on XSDM at ER 2003 (XSDM 2003).- Preface to XSDM 2003.- A Sufficient and Necessary Condition for the Consistency of XML DTDs.- Index Selection for Efficient XML Path Expression Processing.- CX-DIFF: A Change Detection Algorithm for XML Content and Change Presentation Issues for WebVigiL.- Storing and Querying XML Documents Using a Path Table in Relational Databases.- Improving Query Performance Using Materialized XML Views: A Learning-Based Approach.- A Framework for Management of Concurrent XML Markup.- Object Oriented XML Query by Example.- Automatic Generation of XML from Relations: The Nested Relation Approach.- Toward the Automatic Derivation of XML Transformations.- VACXENE: A User-Friendly Visual Synthetic XML Generator.- A New Inlining Algorithm for Mapping XML DTDs to Relational Schemas.- From XML DTDs to Entity-Relationship Schemas.- Extracting Relations from XML Documents.- Extending XML Schema with Nonmonotonic Inheritance.