/// <summary>
/// Gets the version IRI of the ontology, if it is defined, or the ontology
/// IRI if it is not. If neither is defined (i.e. the ontology is anonymous),
/// throws an exception.
/// </summary>
/// <param name="ontology"></param>
/// <returns></returns>
public static Uri GetVersionOrOntologyIri(this Ontology ontology)
{
if (ontology.HasVersionIri())
{
return(ontology.GetVersionIri());
}
return(ontology.GetIri());
}
public static Uri GetVersionIri(this Ontology ontology)
{
if (!ontology.HasVersionIri())
{
throw new RdfException($"Ontology {ontology} does not have an owl:versionIRI annotation");
}
IUriNode versionIri = ontology.Graph.CreateUriNode(VocabularyHelper.OWL.versionIRI);
return ontology.GetNodesViaProperty(versionIri).UriNodes().First().Uri;
}