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FCT
2007
Springer
14 years 1 months ago
Complexity of Pebble Tree-Walking Automata
We consider tree-walking automata using k pebbles. The pebbles are either strong (can be lifted from anywhere) or weak (can be lifted only when the automaton is on it). For each k,...
Mathias Samuelides, Luc Segoufin
AMW
2011
12 years 11 months 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
STOC
1998
ACM
115views Algorithms» more  STOC 1998»
13 years 11 months ago
Weak Alternating Automata and Tree Automata Emptiness
Orna Kupferman, Moshe Y. Vardi
SBBD
2007
126views Database» more  SBBD 2007»
13 years 9 months ago
Constraint-based Tree Pattern Mining
Abstract. A lot of recent applications dealing with complex data require sophisticated data structures (trees or graphs) for their specification. Recently, several techniques for ...
Sandra de Amo, Nyara A. Silva, Ronaldo P. Silva, F...
DLOG
2006
13 years 9 months ago
PSPACE Automata for Description Logics
Tree automata are often used for satisfiability testing in the area of description logics, which usually yields ExpTime complexity results. We examine conditions under which this ...
Jan Hladik, Rafael Peñaloza