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» Querying Unranked Trees with Stepwise Tree Automata
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ICALP
2005
Springer
14 years 1 months ago
Logics for Unranked Trees: An Overview
Labeled unranked trees are used as a model of XML documents, and logical languages for them have been studied actively over the past several years. Such logics have different purpo...
Leonid Libkin
LICS
2007
IEEE
14 years 2 months ago
Alternation-free modal mu-calculus for data trees
d abstract) Marcin Jurdzi´nski and Ranko Lazi´c∗ Department of Computer Science, University of Warwick, UK An alternation-free modal µ-calculus over data trees is introduced ...
Marcin Jurdzinski, Ranko Lazic
FSTTCS
2009
Springer
14 years 3 months ago
On Nondeterministic Unranked Tree Automata with Sibling Constraints
ABSTRACT. We continue the study of bottom-up unranked tree automata with equality and disequality constraints between direct subtrees. In particular, we show that the emptiness pro...
Christof Löding, Karianto Wong
FCT
2005
Springer
14 years 1 months ago
Deterministic Automata on Unranked Trees
Abstract. We investigate bottom-up and top-down deterministic automata on unranked trees. We show that for an appropriate definition of bottom-up deterministic automata it is poss...
Julien Cristau, Christof Löding, Wolfgang Tho...
AMW
2011
13 years 10 hour ago
A Direct Translation from XPath to Nondeterministic Automata
Since navigational aspects of XPath correspond to first-order definability, it has been proposed to use the analogy with the very successful technique of translating LTL into aut...
Nadime Francis, Claire David, Leonid Libkin