At this moment mapping does not have the rdf:type rr:TriplesMap, which is totally fine with the R2RML spec. However, some tools like Virtuoso need the rr:TriplesMap type to find the mappings. Therefore I would suggest adding this type to the mappings.
At this moment mapping does not have the rdf:type rr:TriplesMap, which is totally fine with the R2RML spec. However, some tools like Virtuoso need the rr:TriplesMap type to find the mappings. Therefore I would suggest adding this type to the mappings.