DATA_FORMATS = {
    "application/rdf+xml" : "xml",
    "application/ld+json" : 'json-ld',
    "application/json" : 'json-ld',
    "text/turtle" : "turtle",
    "application/trig" : "trig",
    "application/n-quads" : "nquads",
    "application/n-triples" : "nt",
    "application/rdf+json" : "json",
    "text/html" : None,
    "application/xhtml+xml" : None,
    "application/xhtml" : None,
    None: "json-ld"
}
