   
 (defgroup org-export-reveal nil
   "Options for exporting Orgmode files to reveal.js HTML pressentations."
-  :tag "Org Export reveal")
+  :tag "Org Export reveal"
+  :group 'org-export)
 
 (defun org-reveal--append-path (dir-name path-name)
   "Append `path-name' to the end of `dir-name' to form a legal path name."

   contents))

(defun org-reveal-format-list-item
  (content type checkbox &optional term-counter-id frag headline)
  "Format a list item into Reveal.js HTML."
  (let ((checkbox (concat (org-html-checkbox checkbox) (and checkbox " "))))
    (concat

       (ordered
        (concat
         "<li"
         (if-format " value=\"%s\"" term-counter-id)
         (if-format " class=\"fragment %s\"" frag)
         ">"
         (if headline (concat headline "<br/>"))))
