Data, Ontologies, Rules, and the Return of the Blank Node

Markus Krötzsch
Data, Ontologies, Rules, and the Return of the Blank Node
Keynote at the 21st International Semantic Web Conference, 2022

KurzfassungAbstract
The Semantic Web has long been characterised by the parallel development of machine-readable data and ontological models. Inspired by very different backgrounds – Web data exchange and mathematical logic – the two worlds have sometimes be perceived as complementary, even conflicting. But the general trend towards knowledge graphs made such discussions irrelevant, and modern knowledge models, such as Wikidata, often combine instance and schema data side by side. In my invited talk, I will explain how this unification of data and ontology may present an opportunity to the Semantic Web, and discuss how recent results in rule-based reasoning may provide a basis for overcoming related challenges. This involves some interesting insights about the expressive power that is conferred by extending rules with value invention – the ability to create fresh blank nodes. Besides the theoretical effects of this addition, we can also demonstrate concrete practical uses of this expressive power.
Projekt:Project: CPEC, SECAI, ScaDS.AI
Forschungsgruppe:Research Group: Wissensbasierte SystemeKnowledge-Based Systems

@misc{K2022,
  author = {Markus Kr{\"{o}}tzsch},
  title  = {Data, Ontologies, Rules, and the Return of the Blank Node},
  year   = {2022}
}