Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/9914
Title: Incremental XPath Evaluation
Authors: Bjorklund, Henrik
GELADE, Wouter 
Marquardt, Marcel
MARTENS, Wim 
Issue Date: 2009
Publisher: ACM
Source: Fagin, Ronald (Ed.) Proceedings of the International Conference on Database Theory. p. 162-173.
Series/Report: ACM International Conference Proceeding Series
Series/Report no.: 361
Abstract: We study the problem of incrementally maintaining an XPath query on an XML database under updates. The updates we consider are node insertion, node deletion, and node relabeling. Our main results are that downward XPath queries can be incrementally maintained in time O(depth(D) · poly(Q)) and conjunctive forward XPath queries in time O(depth(D)· log(width(D))·poly(Q)), where D is the size of the database, Q the size of the query, and depth(D) and width(D) are the nesting depth and maximum number of siblings in the database, respectively. The auxiliary data structures for maintenance are linear in D and polynomial in Q in all these cases.
Keywords: XPath
Document URI: http://hdl.handle.net/1942/9914
Link to publication: http://doi.acm.org/10.1145/1514894.1514915
ISBN: 978-1-60558-423-2
Category: C1
Type: Proceedings Paper
Appears in Collections:Research publications

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