Now that Comunica 5 is out it would make sense to add support for RDF 1.2's triple reification and asserted vs. unasserted triples. How to do this greatly depends on what kind of querying capabilities are required for unasserted triples specifically and whether unasserted triples can also be quads or not, something I haven't looked into yet. See also the SPARQL 1.2 spec. A good starting point would be evaluating changes to Comunica's adapters for RDF/JS's Source implementations.
Now that Comunica 5 is out it would make sense to add support for RDF 1.2's triple reification and asserted vs. unasserted triples. How to do this greatly depends on what kind of querying capabilities are required for unasserted triples specifically and whether unasserted triples can also be quads or not, something I haven't looked into yet. See also the SPARQL 1.2 spec. A good starting point would be evaluating changes to Comunica's adapters for RDF/JS's
Sourceimplementations.