66 citations · 154 across the 21 of their papers we have counts for
3 papers · 1 filter
A Journey to the Frontiers of Query Rewritability
Piotr Ostropolski-Nalewaja, Jerzy Marcinkowski, David Carral +1
This paper is about (first order) query rewritability in the context of theory-mediated query answering. The starting point of our journey is the FUS/FES conjecture, saying that if…
Linked Open Data Validity -- A Technical Report from ISWS 2018
Tayeb Abderrahmani Ghor, Esha Agrawal, Mehwish Alam +68
Linked Open Data (LOD) is the publicly available RDF data in the Web. Each LOD entity is identfied by a URI and accessible via HTTP. LOD encodes globalscale knowledge potentially a…
Query Containment for Highly Expressive Datalog Fragments
Pierre Bourhis, Markus Krötzsch, Sebastian Rudolph
The containment problem of Datalog queries is well known to be undecidable. There are, however, several Datalog fragments for which containment is known to be decidable, most notab…