First International Workshop on Conceptual Modeling for GIS (CoMoGIS 2004) -- Preface to CoMoGIS 2004 -- Geographical Conceptual Modeling -- A Conceptual Model for Supporting Multiple Representations and Topology Management -- Modeling Geospatial Databases with Plug-Ins for Visual Languages: A Pragmatic Approach and the Impacts of 16 Years of Research and Experimentations on Perceptory -- Representing Ecological Niches in a Conceptual Model -- A CASE Tool for Geographic Database Design Supporting Analysis Patterns -- Spatial Storage, Indexing and Data Consistency -- GML Storage: A Spatial Database Approach -- TPKDB-Tree: An Index Structure for Efficient Retrieval of Future Positions of Moving Objects -- Moving Point Indexing for Future Location Query -- Topological Consistency for Collapse Operation in Multi-scale Databases -- Spatial Representation and Spatial Services -- Symbolization of Mobile Object Trajectories with the Support to Motion Data Mining -- Representing and Reasoning About Spatial Knowledge Based on Spatial Relevant Logic -- Towards System Architecture of Spatial Information Grid and Service-Based Collaboration -- Geo Web Services Based on Semantic -- Spatial Querying and Retrieval -- A Scaleless Data Model for Direct and Progressive Spatial Query Processing -- Querying Heterogeneous Spatial Databases: Combining an Ontology with Similarity Functions -- Retrieval of Heterogeneous Geographical Information Using Concept Brokering and Upper Level Ontology -- A New Quick Point Location Algorithm -- First International Workshop on Conceptual Model-Directed Web Information Integration and Mining (CoMWIM 2004) -- Preface to CoMWIM 2004 -- Web Information Integration -- Checking Semantic Integrity Constraints on Integrated Web Documents -- X2S: Translating XPath into Efficient SQL Queries -- On Aggregation Operators for Fuzzy Information Sources -- Web Information Mining -- CL2: A Multi-dimensional Clustering Approach in Sensor Networks -- TCMiner: A High Performance Data Mining System for Multi-dimensional Data Analysis of Traditional Chinese Medicine Prescriptions -- Association Rule Mining Based on the Multiple-Dimensional Item Attributes -- Conceptual Model for Web Information -- OWL-Based Semantic Conflicts Detection and Resolution for Data Interoperability -- From Ontology to Relational Databases -- A New Dynamic Indexing Structure for Searching Time-Series Patterns -- Web Information Systems and Web Services -- Automatic Location and Separation of Records: A Case Study in the Genealogical Domain -- Research and Implementation of CORBA Web Services -- Grammar Based Interface Processing in Web Service Composition -- Query Rewriting for Extracting Data Behind HTML Forms -- Third International Workshop on Evolution and Change in Data Management (ECDM 2004) -- Preface to ECDM 2004 -- Systems Evolution Support in Conceptual Modeling -- Automatic Integrity Constraint Evolution due to Model Subtract Operations -- An Ontological Framework for Evolutionary Model Management -- Elementary Translations: The Seesaws for Achieving Traceability Between Database Schemata -- Temporal and Evolution Aspects in Internet-Based Information Systems -- Towards the Managment of Time in Data-Intensive Web Sites -- Evolution of XML-Based Mediation Queries in a Data Integration System -- Schema Evolution and Versioning in Data Management -- Schema Versioning in Data Warehouses -- Facilitating Database Attribute Domain Evolution Using Mesodata -- Multitemporal Conditional Schema Evolution -- First International Workshop on Conceptual Modeling for Agents (CoMoA 2004) -- Preface to CoMoA 2004 -- Conceptual Modelling of Agents -- A Sociological Framework for Multi-agent Systems Validation and Verification -- Spatio-temporal Relevant Logic as the Logical Basis for Specifying, Verifying, and Reasoning About Mobile Multi-agent Systems -- Towards an Ontology for Agent Mobility -- Agents’ Applications and Conceptual Models -- Subjective Trust Inferred by Kalman Filtering vs. a Fuzzy Reputation -- Conceptual Model of BDI Agents within an ITS -- Model-Driven Agent-Based Web Services IDE -- AFDM: A UML-Based Methodology for Engineering Intelligent Agents -- First International Workshop on Digital Government: Systems and Technologies (DGOV 2004) -- Preface to DGOV 2004 -- Digital Government: Systems -- IECS: An Integrated E-Community System for Management, Decision and Service -- WebDG – A Platform for E-Government Web Services -- A Study on Camera-Detector System for Traffic Control in Korea -- Digital Government: Technologies -- Ontology-Based Models of Legal Knowledge -- Aspects of Regulatory and Legal Implications on e-Voting -- Architecture for Implementing the Mobile Government Services in Korea -- Fifth International Workshop on Conceptual Modeling Approaches for E-Business (eCOMO 2004) -- Preface to eCOMO 2004 -- E-Business Systems Requirements Engineering -- Modeling Business Strategy in E-Business Systems Requirements Engineering -- A Method and Tool for Wide Audience Requirements Elicitation and Rapid Prototyping for Mobile Systems -- Methodology for the Development of a Sectoral Standard for EDI -- E-Business Systems Requirements Engineering -- Classification of Business Process Correspondences and Associated Integration Operators -- On Behavioural Model Transformation in Web Services -- Model-Driven Planning and Development of Infrastructures for E-Commerce.