Invited Contribution.- Quilt: An XML Query Language for Heterogeneous Data Sources.- Information Gathering.- Theme-Based Retrieval of Web News.- Using Metadata to Enhance Web Information Gathering.- Architecting a Network Query Engine for Producing Partial Results.- Caching.- Argos: Efficient Refresh in an XQL-Based Web Caching System.- Active Query Caching for Database Web Servers.- Querying XML.- Adding Relevance to XML.- Evaluating Queries on Structure with eXtended Access Support Relations.- Efficient Relational Storage and Retrieval of XML Documents.- XML Structuring and Versioning.- XML and Object-Relational Database Systems Enhancing Structural Mappings Based on Statistics.- Everything You Ever Wanted to Know About DTDs, But Were Afraid to Ask (Extended Abstract).- Version Management of XML Documents.- Web Modeling.- Modeling Data Entry and Operations in WebML.- Query Processing.- An Optimization Technique for Answering Regular Path Queries.- XDuce: A Typed XML Processing Language (Preliminary Report).- Classification and Retrieval.- Automatic Classification of Text Databases through Query Probing.- Locating and Reconfiguring Records in Unstructured Multiple-Record Web Documents.