introduce rdflib as a dependency?

[pvgenuchten]

for the more semantic formats, such as DC, schema.org, DCAT it makes sense to offer capability to export them in any of the supported rdf-serialisations; jsonld, xml/rdf or ttl. this capability is offered by the rdflib library. similar for ingesting metadata, the library would be able to ingest data in either one of these serialisations.

from rdflib import Graph
g = Graph()
g.parse(data=rdfxml, format='xml')
ttl = g.serialize(format='jsonld')

on the other hand it will complicate the setup of this tool...

any thoughts?