I am not sure if we should mention the specification mentioned by Eric because it is still in a draft stage. If we're gonna mention, then the editors will need some help to write the text. Last year a message was sent to Christophe asking help about this comment: https://lists.w3.org/Archives/Public/public-dwbp-wg/2015Jul/0055.html (in the current version this comment concerns BP 29).
Proposed resolution: To update the text on the DWBP document to replace public-dwbp-wg@w3.orhttps://www.w3.org/2006/02/lc-comments-tracker/68239/WD-dwbp-20150224/3034g by public-dwbp-comments@w3.org.
Proposed resolution: Best Practice 18 Vocabulary versioning was removed from the document. The current version of the document doesn't deal with vocabulary versioning.
To update the document to be more generic about the different types of metadata. Christophe said: "It should also be ok saying there are several type of metadata without going into much details."