Creating virtual graph when CSV contains legitimate URIs

Support
1

I have a CSV file with a few columns containing fully-qualified URIs for entities that are already in my graph. I have been able to import a virtual graph, but it seems like the URI columns are being treated as if they contain plain strings.

I'm using the first generation SMS. I could theoretically strip out "http.*/" form each URI, but I don't think I can do a mapping like below because the URIs in a given column don't all come from the same namespace.

prefix:{"somekey"} a prefix:Entity ;
    prefix:term staticns:{termfragment};
    sm:map [
      sm:table "csv_with_uris" ;
    ] .