2 citations · 3 across the 5 of their papers we have counts for
4 papers · 1 filter
Expressiveness within Sequence Datalog
Heba Aamer, Jan Hidders, Jan Paredaens +1
Motivated by old and new applications, we investigate Datalog as a language for sequence databases. We reconsider classical features of Datalog programs, such as negation, recursio…
J-Logic: a Logic for Querying JSON
Jan Hidders, Jan Paredaens, Jan Van den Bussche
We propose a logical framework, based on Datalog, to study the foundations of querying JSON data. The main feature of our approach, which we call J-Logic, is the emphasis on paths.…
Structural characterizations of the navigational expressiveness of relation algebras on a tree
George H. L. Fletcher, Marc Gyssens, Jan Paredaens +2
Given a document D in the form of an unordered node-labeled tree, we study the expressiveness on D of various basic fragments of XPath, the core navigational language on XML docume…
Instance-Independent View Serializability for Semistructured Databases
Stijn Dekeyser, Jan Hidders, Jan Paredaens +1
Semistructured databases require tailor-made concurrency control mechanisms since traditional solutions for the relational model have been shown to be inadequate. Such mechanisms n…