1 citations · 1 across the 2 of their papers we have counts for
2 papers
cs.AI2017
The Bag Semantics of Ontology-Based Data Access
Charalampos Nikolaou, Egor V. Kostylev, George Konstantinidis +3
Ontology-based data access (OBDA) is a popular approach for integrating and querying multiple data sources by means of a shared ontology. The ontology is linked to the sources usin…
cs.DB2012★ 1 cited
Incomplete Information in RDF
Charalampos Nikolaou, Manolis Koubarakis
We extend RDF with the ability to represent property values that exist, but are unknown or partially known, using constraints. Following ideas from the incomplete information liter…