Abstract

Ontologies contain semantic relationships and dependencies for, either, ontological studies of a subject or as a blueprint for connected data within Knowledge Graphs (KGs). The ontologies themselves, however, can become difficult to comprehend as specialized class diagrams or complete views. We present an improved interactive visualization for ontology exploration using circle packed hierarchical views within our Ontology and Semantic Exploration Toolkit (OnSET) as the base layer, with interactive visual lenses. The circle packed visualization is enriched in two novel ways incorporating Language Models (LMs): first, by linking sparse datasets to the ontology using semantic matching. The second enrichment is performed by employing topic modelling on the ontology and its connection to find groups of topics that cluster the ontology in a hierarchical manner.