This reformulation of enclosures is completely useless except for adding an optional “description” attribute. I think enclosures are groovy but fundamentally inaccessible in ways that are ultimately harmful to the web. Why not just take a cue from HTML and allow three optional attributes: title, alt, and longdesc. This wouldn’t break backwards compatibility with anything and while honestly it probably wouldn’t be used much at least the possibility is there for something. Perhaps Matt May could give some feedback on this.