Man pages matching name rdf::aref::decoder in section 3pm:

RDF::aREF::Decoder.3pm.en	debian 10 / librdf-aref-perl
RDF::aREF::Decoder.3pm.en	debian 11 / librdf-aref-perl
RDF::aREF::Decoder.3pm.en	debian 12 / librdf-aref-perl