No return value, called for the side effect of exporting an ontology.
Arguments
ontology
ontology(1) an already loaded or created
ontology object.
filename
character(1) the filename of the exported
ontology. The format of the exported ontology is guessed by the extension
of the filename. The guessing is performed by the rdflib package. Valid
extensions are ".rdf" for "rdfxml", ".nt" for "ntriples", ".ttl" for
"turtle" or ".json" for "jsonld".