Hello,

Having the following mock data set, backed by Jena Fuseki, with a triple in 
a graph: 

>>> store = 
SPARQLUpdateStore(queryEndpoint='http://localhost:3030/dev/query', 
update_endpoint='http://localhost:3030/dev/update')
>>> ds = Dataset(store, default_union=True)
>>> gr = ds.graph(URIRef('urn:g:1'))
>>> gr.add((URIRef('urn:s:1'), URIRef('urn:p:1'), URIRef('urn:o:1')))

I want to delete that triple without knowing which graph it is in, 
considering that there may be many other graphs and triples in the data 
set. 

In SPARQL that would correspond to: 

DELETE {
   GRAPH ?g {
     <urn:s:1> <urn:p:1> <urn:o:1> .
  }
} WHERE {}

I *must* specify a graph, either by IRI or variable, or Fuseki won't remove 
the tripleā€”i.e. something like 

>>> ds.remove((URIRef('urn:s:1'), URIRef('urn:p:1'), URIRef('urn:o:1')))

or even

>>> ds.remove((URIRef('urn:s:1'), URIRef('urn:p:1'), URIRef('urn:o:1'), 
None))

won't work. 

How would I do that in RDFLib? 

Thanks,
Stefano

-- 
http://github.com/RDFLib
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