Manual:$wgAllowRdfaAttributes/pt-br

Detalhes
Enable RDFa attributes for use in wikitext. For this to work  must be set to , which is the default as well as unchangeable since MW 1.22+. Starting with MW 1.27+ RDFa attributes will be allowed by default. However the RDFa version to use must explicitly be set with  to   or.