I've implemented the ADMS.SW export of the Debian PTS using blank nodes for contributors to the projects and the SPDX information about the packages.
However, the validator complains about every blank nodes as they don't have a URI (sic).
I'm not sure : are blank nodes allowed per the specs, or is this just a limitation of the validator ?
For instance : http://packages.qa.debian.org/a/apache2.ttl
Thanks in advance