Egor V. Kostylev

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20152023

most citedEstimating the Cardinality of Conjunctive Queries over RDF Data Using Graph Summarisation

43 citations · 80 across the 10 of their papers we have counts for

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Showing 2017Show all

2 papers · 1 filter

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.AI2017

Foundations of Declarative Data Analysis Using Limit Datalog Programs

Mark Kaminski, Bernardo Cuenca Grau, Egor V. Kostylev +2

Motivated by applications in declarative data analysis, we study $Datalog_{Z}$ ---an extension of positive Datalog with arithmetic functions over integers. This la…