RDA seems to have syntax issues with all of its format variants, see #176 and #177. This seems to be a structural problem.
There are modern tools out there that can generate standard-conforming RDF. TriplyDB.com offers a free service for the first 1M triples. Please make use of modern tools that guarantee syntactic correctness.
Observed
The following line contains illegal syntax: https://github.com/RDARegistry/RDA-Vocabularies/blob/master/jsonld/Contexts/elements_en.jsonld#L2
Expected
The JSON-LD files to follow the JSON syntax.
Wider context
RDA seems to have syntax issues with all of its format variants, see #176 and #177. This seems to be a structural problem.
There are modern tools out there that can generate standard-conforming RDF. TriplyDB.com offers a free service for the first 1M triples. Please make use of modern tools that guarantee syntactic correctness.