I disagree. "b:separator" should be a component of its own, not a semantic one, like a <hr/> tag with more options. It's important to keep the "Facet" suffix IMO because it tells people "Warning, this is not a real component, only use it inside another component supporting it". If a new user was seeing a "b:separator" component, he would probably feel conforable with using it anywhere and wouldn't understand to have an exception. And he would be right.