Erreur W3c : The scheme attribute on the meta element is obsolete
La validation W3C donne une erreur The scheme attribute on the meta element is obsolete. Use only one scheme per field, or make the scheme declaration part of the value.
Ca concerne la partie DublinCore : DC.Language, DC.Date, DC.Date.Modified, DC.Identifier et DC.Source
Testé en SPIP 4.0 / Métas+ 2.3.14