Right now we have all our HTML metadata stuffed in one giant file. If a user asks for code completions they get anything in there. Some users may want that list limited by the doctype declared in the document, or an explicit setting per-project. As an example, I'd like to work with HTML5 and only receive the values that are valid in 5 and aren't deprecated/removed. There is currently no way to limit it in this way - and thus I may not be aware that <plaintext>, <basefont>, <big>, <font>, <tt>, <s>, <strike>, <u>, <center>, <acronym>, <applet>, <dir> are all deprecated/removed.