gYear literal not parsed correctly

[situx]

Hi all,

I have used rdflib to parse my graph for a documentation CI script.
My graph contains xsd:gYear literals with years positive and negative (BC and AD) and the year 0.

If you look at this CI log (https://github.com/archaeolink/SPP1630Harbours-RDF/actions/runs/4533869034/jobs/7987262817), you will see that rdflib seems to expect an ISO Date from this literal type, however, this is incorrect, if you follow the official specification also indicated here: http://rdf.greggkellogg.net/yard/RDF/Literal/Year.html

Could this be a bug in the RDFLib implementation?

Thanks for your consideration.

[aucampia]

Could this be a bug in the RDFLib implementation?

It very likely could be, a more isolated example would help in determining if it is.

[aucampia]

You may want to look at this also: #2210.