(article
 (hgroup
  (h1 "latl primitives")
  (p (em "what will latl provide out of the box?")))
 (p
  ;; show some diagrams of what is needed. no pseudocode.
  ;; 
  "")
 (section
  (hgroup
   (h2 "")
   (p (em "")))
  "")
 )