LD-VOWL (LinkedDataVOWL) extracts ontology information out of arbitrary SPARQL endpoints and shows the extracted information in an overview visualization using the VOWL notation (with minor modifications).
We suspend that, because I figured out another easier way of extracting ontology. And recently the use of ontology for LLM2SPARQL is not necessarily indispensable.
LD-VOWL
LD-VOWL (LinkedDataVOWL) extracts ontology information out of arbitrary SPARQL endpoints and shows the extracted information in an overview visualization using the VOWL notation (with minor modifications).
Before using that, I installed Node.js (see: https://github.com/VisualDataWeb/LD-VOWL?tab=readme-ov-file). The last step to be confirmed: