Research Issues in Structured and Semistructured Database Programming: 7th International Workshop on Database Programming Languages, DBPL’99 Kinloch Rannoch, UK, September 1–3,1999 Revised PapersAuthor: Richard Connor, Alberto Mendelzon Published by Springer Berlin Heidelberg ISBN: 978-3-540-41481-0 DOI: 10.1007/3-540-44543-9Table of Contents:Semistructured Computation On the Power of Incremental Evaluation in SQL-like Languages Optimization of Nested SQL Queries by Tableau Equivalence User-Defined Aggregates in Database Languages How to Make SQL Stand for String Query Language Structured Document Transformations Based on XSL Extensions of Attribute Grammars for Structured Document Queries 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 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 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 On the Difference between Navigating Semi-structured Data and Querying It Ozone: Integrating Structured and Semistructured Data, Includes bibliographical references and index, Querying and query optimisation -- Languages for document models -- Persistence, components and workflow -- Typing and querying semistructured data -- Active and spatial databases -- Unifying semistructured and traditional data models