Evgeny Kharlamov, Werner Nutt, Pierre Senellart. Value joins are expensive over (probabilistic) XML. In George H. L. Fletcher, Slawek Staworko, editors, Proceedings of the 4th International Workshop on Logic in Databases, Uppsala, Sweden, (EDBT/ICDT '10 joint conference), March 25, 2011, Proceedings. pages 41-48, ACM, 2011. [doi]
Abstract is missing.