TY - GEN
T1 - Eager xpath evaluation over XML streams
AU - Hagio, Kazuhito
AU - Ohgami, Takashi
AU - Bannai, Hideo
AU - Takeda, Masayuki
PY - 2012/10/22
Y1 - 2012/10/22
N2 - We address the XPath evaluation problem over XML streams. We consider a fragment of XPath called Conjunctive XPath (CXP). We present an algorithm that eagerly evaluates a CXP query Q against a streaming XML data D in O((|Q|∈+∈n 2)|D|) time and O(|Q|height(D) ∈+∈n·maxcands(Q,D)) space, where n is the number of location steps in Q and maxcands(Q,D) is the maximum number of nodes of D that can be candidates for answer nodes, at any one instant. The result improves the previous work of Ramanan (2009) which lazily evaluates Q against D in O((|Q|∈+∈n·height(D))|D|) time using the same space.
AB - We address the XPath evaluation problem over XML streams. We consider a fragment of XPath called Conjunctive XPath (CXP). We present an algorithm that eagerly evaluates a CXP query Q against a streaming XML data D in O((|Q|∈+∈n 2)|D|) time and O(|Q|height(D) ∈+∈n·maxcands(Q,D)) space, where n is the number of location steps in Q and maxcands(Q,D) is the maximum number of nodes of D that can be candidates for answer nodes, at any one instant. The result improves the previous work of Ramanan (2009) which lazily evaluates Q against D in O((|Q|∈+∈n·height(D))|D|) time using the same space.
UR - http://www.scopus.com/inward/record.url?scp=84867549164&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84867549164&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-34109-0-26
DO - 10.1007/978-3-642-34109-0-26
M3 - Conference contribution
AN - SCOPUS:84867549164
SN - 9783642341083
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 245
EP - 250
BT - String Processing and Information Retrieval - 19th International Symposium, SPIRE 2012, Proceedings
T2 - 19th International Symposium on String Processing and Information Retrieval, SPIRE 2012
Y2 - 21 October 2012 through 25 October 2012
ER -