public static Uri GetVersionUri(this Ontology ontology)
{
if (!ontology.HasVersionUri())
{
throw new RdfException($"Ontology {ontology} does not have an owl:versionIRI annotation");
}
IUriNode versionIri = ontology.Graph.CreateUriNode(VocabularyHelper.OWL.versionIRI);
return(ontology.GetNodesViaPredicate(versionIri).UriNodes().First().Uri);
}