Search Results for author: Markus Krötzsch

Found 7 papers, 5 papers with code

Nemo: First Glimpse of a New Rule Engine

1 code implementation30 Aug 2023 Alex Ivliev, Stefan Ellmauthaler, Lukas Gerlach, Maximilian Marx, Matthias Meißner, Simon Meusel, Markus Krötzsch

This system demonstration presents Nemo, a new logic programming engine with a focus on reliability and performance.

Knowledge Graphs

Efficient Dependency Analysis for Rule-Based Ontologies

1 code implementation20 Jul 2022 Larry González, Alex Ivliev, Markus Krötzsch, Stephan Mennicke

Several types of dependencies have been proposed for the static analysis of existential rule ontologies, promising insights about computational properties and possible practical uses of a given set of rules, e. g., in ontology-based query answering.

Knowledge Graphs

Chasing Streams with Existential Rules

no code implementations4 May 2022 Jacopo Urbani, Markus Krötzsch, Thomas Eiter

We study reasoning with existential rules to perform query answering over streams of data.

Column-Oriented Datalog Materialization for Large Knowledge Graphs (Extended Technical Report)

1 code implementation28 Nov 2015 Jacopo Urbani, Ceriel Jacobs, Markus Krötzsch

The evaluation of Datalog rules over large Knowledge Graphs (KGs) is essential for many applications.

Knowledge Graphs

Acyclicity Notions for Existential Rules and Their Application to Query Answering in Ontologies

no code implementations4 Feb 2014 Bernardo Cuenca Grau, Ian Horrocks, Markus Krötzsch, Clemens Kupke, Despoina Magka, Boris Motik, Zhe Wang

Existential rules are closely related to the Horn fragments of the OWL 2 ontology language; furthermore, several prominent OWL 2 reasoners implement CQ answering by using the chase to materialise all relevant facts.

A Description Logic Primer

1 code implementation19 Jan 2012 Markus Krötzsch, Frantisek Simancik, Ian Horrocks

This paper provides a self-contained first introduction to description logics (DLs).

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