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PODS
2008
ACM
143views Database» more  PODS 2008»
14 years 11 months ago
XPath, transitive closure logic, and nested tree walking automata
We consider the navigational core of XPath, extended with two operators: the Kleene star for taking the transitive closure of path expressions, and a subtree relativisation operat...
Balder ten Cate, Luc Segoufin
ICDT
2009
ACM
119views Database» more  ICDT 2009»
14 years 11 months ago
Incremental XPath evaluation
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. ...
Henrik Björklund, Marcel Marquardt, Wim Marte...
VLDB
2002
ACM
106views Database» more  VLDB 2002»
13 years 10 months ago
Efficient Algorithms for Processing XPath Queries
Our experimental analysis of several popular XPath processors reveals a striking fact: Query evaluation in each of the systems requires time exponential in the size of queries in ...
Georg Gottlob, Christoph Koch, Reinhard Pichler
ICDE
2006
IEEE
149views Database» more  ICDE 2006»
15 years 6 days ago
An Efficient XPath Query Processor for XML Streams
Streaming XPath evaluation algorithms must record a potentially exponential number of pattern matches when both predicates and descendant axes are present in queries, and the XML ...
Yi Chen, Susan B. Davidson, Yifeng Zheng