Relax identifiers "format": "uri"
Created by: agbeltran
Currently, the identifier related schemas include "format": "uri"
while the original intention was to support both strings (for accession numbers that are not URIs) and URIs when available.
The examples we have at https://github.com/datatagsuite/examples demonstrate this, as we supported strings as identifiers in addition to URIs, but the problem was that the validator wasn't catching the "format": "uri"
restriction.
This issue was originated here: https://github.com/dcppc/crosscut-metadata/issues/8 by @jonathancrabtree