Hi Hugh
Thanks for the remarks. No, the triples which I refer to are "real".
I have found a way to reproduce the problem, that at this point could be an
issue of Virtuoso Open Source.
The RDF graphs generated using DB.DBA.TTLP() and DB.DBA.R2RML_MAKE_QM_FROM_G()
procedures cannot be deleted and
Hi Beppe,
If these are RDF Linked Data View “Virtual” Graphs then these are stored in a
different Quad Map storage location, see:
http://docs.openlinksw.com/virtuoso/rdfviewquadmapatternsvalueandiriclasses/
But you should be able to delete such graphs wit the “drop graph ”
sparql
