@inproceedings{PODS-2000-NevenS,
	author        = "Frank Neven and Thomas Schwentick",
	booktitle     = "{Proceedings of the 19th Symposium on Principles of Database Systems}",
	doi           = "10.1145/335168.335217",
	isbn          = "1-58113-214-X",
	pages         = "145--156",
	publisher     = "{ACM}",
	title         = "{Expressive and Efficient Pattern Languages for Tree-Structured Data}",
	year          = 2000,
}