Patterns and Types for Querying XML Documents -- Dual Syntax for XML Languages -- Exploiting Schemas in Data Synchronization -- Efficiently Enumerating Results of Keyword Search -- Mapping Maintenance in XML P2P Databases -- Inconsistency Tolerance in P2P Data Integration: An Epistemic Logic Approach -- XML Data Integration with Identification -- Satisfiability of XPath Queries with Sibling Axes -- XML Subtree Queries: Specification and Composition -- On the Expressive Power of XQuery Fragments -- A Type Safe DOM API -- Type-Based Optimization for Regular Patterns -- Efficient Memory Representation of XML Documents -- N-Ary Queries by Tree Automata -- Minimizing Tree Automata for Unranked Trees -- Dependency-Preserving Normalization of Relational and XML Data -- Complexity and Approximation of Fixing Numerical Attributes in Databases Under Integrity Constraints -- Consistent Query Answers on Numerical Databases Under Aggregate Constraints.