@inproceedings{SIGMOD-2004-PaparizosWLJ,
	author        = "Stelios Paparizos and Yuqing Wu and Laks V. S. Lakshmanan and H. V. Jagadish",
	booktitle     = "{Proceedings of the 32nd ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1007568.1007579",
	isbn          = "1-58113-859-8",
	pages         = "71--82",
	publisher     = "{ACM}",
	title         = "{Tree Logical Classes for Efficient Evaluation of XQuery}",
	year          = 2004,
}