@BasilBourque, I feel this can be specified by that mostly The solution's 1st sentence is extremely brief / misleading: " is adequate but in XHTML is favored ..." => 1 could infer Which may be used in XHTML, which is not truth of the matter. You should not provide it https://gameonline03456.full-design.com/5-essential-elements-for-html-5-game-83377341