Invited Paper -- Semistructured Computation -- Querying and Query Optimisation -- On the Power of Incremental Evaluation in SQL-like Languages -- Optimization of Nested SQL Queries by Tableau Equivalence -- User-Defined Aggregates in Database Languages -- Languages for Document Models -- How to Make SQL Stand for String Query Language -- Structured Document Transformations Based on XSL -- Extensions of Attribute Grammars for Structured Document Queries -- Persistence, Components and Workflow -- An Overview of Souk Nets: A Component-based Paradigm for Data Source Integration -- Defining and Handling Transient Fields in PJama -- A Framework for Optimizing Distributed Workflow Executions -- Typing and Querying Semistructured Data -- Querying Semistructured Data Based on Schema Matching -- Union Types for Semistructured Data -- Query Optimization for Semistructured Data Using Path Constraints in a Deterministic Data Model -- Active and Spatial Databases -- Expressing topological connectivity of spatial databases -- A Representation Independent Language for Planar Spatial Databases with Euclidean Distance -- An Abstract Interpretation Framework for Termination Analysis of Active Rules -- Unifying Semistructured and Traditional Data Models -- On the Difference between Navigating Semi-structured Data and Querying It -- Ozone: Integrating Structured and Semistructured Data.