29 search results - page 1 / 6 » Tree Extension Algebras: Logics, Automata, and Query Languag... |
LICS
2002
IEEE
13 years 9 months ago
2002
IEEE
We study relations on trees defined by first-order constraints over a vocabulary that includes the tree extension relation Ì Ì ¼, holding if and only if every branch of Ì ex...
ENTCS
2002
13 years 4 months ago
2002
Abstract. We present an extension to linear-time temporal logic (LTL) that combines the temporal specification with the collection of statistical data. By collecting statistics ove...
ICALP
2000
Springer
13 years 8 months ago
2000
Springer
Abstract. Tree-walking automata (TWAs) recently received new attention in the fields of formal languages and databases. Towards a better understanding of their expressiveness, we c...
PODS
2008
ACM
14 years 4 months ago
2008
ACM
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...
PLANX
2007
13 years 6 months ago
2007
Although monadic second-order logic (MSO) has been a foundation of XML queries, little work has attempted to take MSO formulae themselves as a programming construct. Indeed, MSO f...