HTML5 Support is available in CKEditor 4
I would probably use the HTML 4.0.1 transitional doctype.
CKEditor 4+ does support the doctype of HTML5 now which is how all of our sites are going, with jQuery and MP4 video embedding. Here is a snippet or two from their documentation site:
"All browsers are to be supported for web pages with the Document Type Declaration (DOCTYPE) of HTML5 (<!DOCTYPE html>) except for IE 9 Quirks that will support unknown doctypes."
docType : String
Sets the DOCTYPE to be used when loading the editor content as HTML.
// Set the DOCTYPE to the HTML 4 (Quirks) mode.
config.docType = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">';
Defaults to: '<!DOCTYPE html>'
What version of CKEditor is being used in HTML Editor and can we update this ourselves to the most current version or do we wait for an update to Data Bridge?