XTCcmp: XQuery compilation on XTC. - Christian Mathis; Andreas M. Weiner; Theo Härder; Caesar Ralf Franz Hoppen (Proc. VLDB Endow., 2008)

Now it's Obvious to The Eye - Visually Explaining XQuery Evaluation in a Native XML Database Management System. - Andreas M. Weiner; Christian Mathis; Theo Härder; Caesar Ralf Franz Hoppen (BTW, 2009)