RDFa support was dropped from RDFLib since RDFLib version 5.0. There have been changes to the RDFLib 5.0 which breaks its compatibility with pyRDFa3, and unfortunately, there is currently no plan on maintaining its compatibility according to the discussion on pyRDFa3's GitHub page. I think It would be great to bring RDFa compatibility back to the current version. Thank you!