Michael Benedikt Angela Bonifati Sergio Flesca Avinash Vyas Adding Updates to XQuery: Semantics, Optimization, and Static Analysis. 2005 conf/ximep/2005 XIME-P http://www.ximeco.org/Xime/AddingUpdatesToXQueryBenedikt.pdf db/conf/ximep/ximep2005.html#BenediktBFV05