13 citations · 22 across the 7 of their papers we have counts for
9 papers
Attacking Diophantus: Special Cases of Bag Containment
George Konstantinidis, Xinzhuo Li, Fabio Mogavero
Query containment is a fundamental decision problem in database theory: given two queries, determine whether, over all database instances, every answer produced by the first is als…
A Review of SHACL: From Data Validation to Schema Reasoning for RDF Graphs
Paolo Pareti, George Konstantinidis
We present an introduction and a review of the Shapes Constraint Language (SHACL), the W3C recommendation language for validating RDF data. A SHACL document describes a set of cons…
Satisfiability and Containment of Recursive SHACL
Paolo Pareti, George Konstantinidis, Fabio Mogavero
The Shapes Constraint Language (SHACL) is the recent W3C recommendation language for validating RDF data, by verifying certain shapes on graphs. Previous work has largely focused o…
SHACL Satisfiability and Containment (Extended Paper)
Paolo Pareti, George Konstantinidis, Fabio Mogavero +1
The Shapes Constraint Language (SHACL) is a recent W3C recommendation language for validating RDF data. Specifically, SHACL documents are collections of constraints that enforce pa…
A Policy Editor for Semantic Sensor Networks
Paolo Pareti, George Konstantinidis, Timothy J. Norman
An important use of sensors and actuator networks is to comply with health and safety policies in hazardous environments. In order to deal with increasingly large and dynamic envir…
On positionality of trigger strategies Nash Equilibria in SCAR
George Konstantinidis, Athanasios Kehagias
We study the positionality of \emph{trigger strategies} Nash equilibria for the -player SCAR games (with ). Our study is exha…
Rule Applicability on RDF Triplestore Schemas
Paolo Pareti, George Konstantinidis, Timothy J. Norman +1
Rule-based systems play a critical role in health and safety, where policies created by experts are usually formalised as rules. When dealing with increasingly large and dynamic so…
Dataset search: a survey
Adriane Chapman, Elena Simperl, Laura Koesten +4
Generating value from data requires the ability to find, access and make sense of datasets. There are many efforts underway to encourage data sharing and reuse, from scientific pub…
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…