Manual:$wgAllowMicrodataAttributes/pt-br

Detalhes
Allows to enable HTML5 microdata attributes for use in wikitext. For this to work must be set to "true", which is the default as well as unchangeable since MW 1.22+. Starting with MW 1.27+ HTML5 microdata attributes will be allowed by default.

Ver também

 * HTML Tags extension to add "Rich snippets" for breadcrumbs