From W3C Wiki
Is PPR:ListMode an PPR:AntiPattern? Not quite... I think categories with backlinks are preferred, ala. hm... RDFApplicationsAndProjects ... too awkward to expect lots of backlinks... We could do a bit of a pun and call them classes ;-) or a pun on N3's 'a', as in aRDFSchema. are they RDF applications, RDF schemas, or RDF vocabularies?