Handle mimetypes of input and output flowfiles

[GordianDziwis]

Input

RDFDataMgr can't determine the syntax from a stream.

nifi-sparql-integrate-bundle/nifi-sparql-integrate-processors/src/main/java/org/aksw/sparql_integrate/processors/sparql_integrate/SparqlIntegrateProcessor.java

Line 212 in b3e5809

RDFDataMgr.read(dataset, in, baseUri, RDFLanguages.nameToLang(rdfDataInputSyntax));

Output

Could be triples or Quads, see:
Scaseco/RdfProcessingToolkit#6