Can't export a graph db from Neo4j in rdf

Hi guys! :smiley:

I just started to work with Neo4j, using the Neosemantics plugin. Lately I've been trying really hard to find out how I can export my graph db in rdf/xml serialization. I have found some solutions in the Documentation, but apparently, I cannot work this out alone, as I come from a totally different backround (humanities). What I want is to export the entire db (and not just some nodes) in rdf/xml and then import the rdf file into Jena, to execute some SPARQL queries (I'm at an experimental phase for my thesis).

I have tried to run this :

":POST /rdf/neo4j/cypher
{ "cypher" : "MATCH path = (n)-[r]-(m) RETURN path" , "format": "RDF/XML" }"

and the following error appears :

Could not fetch URL: "Failed to fetch". This could be due to the remote server policy. See your web browsers error console for more information.

Could anyone help? I would really appreciate it.