If you run the following code
from rdflib import Dataset input_data = "<http://s> <http://v> <http://o>." ds = Dataset() ds.parse(data=input_data, format="nquads") print(ds.serialize(format="nquads"))
you will get something like <http://s> <http://v> <http://o> _:Nf7773353eb67460ab92041894df76998 .
I believe that is wrong, since there was no graph label in the input data, and RDF standard clearly distinguishes between the default graph and named graphs.
Is this a bug, or is there a way to make it not do that? If it is necessary to have some graph in there internally, I think I saw some tools use specific IRIs like http://www.w3.org/1999/02/22-rdf-syntax-ns#defaultGraph, but in that case there wouldn't be a reason not to leave those out when serializing.
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