XQuery exam material
Silberschatz hoofdstuk 10: "XML" (pdf, ppt)
XML tutorial
Pathfinder: A Purely Relational XQuery Processor (website, publications)
MonetDB/XQuery: A Fast XQuery Processor Powered by a Relational Engine (website, publications )
ORDPATHs: Insert-Friendly XML Node Labels
Holistic Twig Joins: Optimal XML Pattern Matching
The Design and Performance Evaluation of Alternative XML Storage Strategies
Efficient Storage and Retrieval of XML
Background reading material
A General technique to querying XML documents using a relational DBMS
W3C family of XML-related activities, e.g.: