46 citations · 63 across the 13 of their papers we have counts for
14 papers
Complete Approximations of Incomplete Queries
Julien Corman, Werner Nutt, Ognjen Savković
This paper studies the completeness of conjunctive queries over a partially complete database and the approximation of incomplete queries. Given a query and a set of completeness r…
On Expansion and Contraction of DL-Lite Knowledge Bases
Dmitriy Zheleznyakov, Evgeny Kharlamov, Werner Nutt +1
Knowledge bases (KBs) are not static entities: new information constantly appears and some of the previous knowledge becomes obsolete. In order to reflect this evolution of knowled…
Doctoral Advisor or Medical Condition: Towards Entity-specific Rankings of Knowledge Base Properties [Extended Version]
Simon Razniewski, Vevake Balaraman, Werner Nutt
In knowledge bases such as Wikidata, it is possible to assert a large set of properties for entities, ranging from generic ones such as name and place of birth to highly profession…
Enabling Fine-grained RDF Data Completeness Assessment
Fariz Darari, Simon Razniewski, Radityo Eko Prasojo +1
Nowadays, more and more RDF data is becoming available on the Semantic Web. While the Semantic Web is generally incomplete by nature, on certain topics, it already contains complet…
Query Stability in Monotonic Data-Aware Business Processes [Extended Version]
Ognjen Savkovic, Elisa Marengo, Werner Nutt
Organizations continuously accumulate data, often according to some business processes. If one poses a query over such data for decision support, it is important to know whether th…
Mapping-equivalence and oid-equivalence of single-function object-creating conjunctive queries
Angela Bonifati, Werner Nutt, Riccardo Torlone +1
Conjunctive database queries have been extended with a mechanism for object creation to capture important applications such as data exchange, data integration, and ontology-based d…