A minimal org sample presentation

gistfile1.txt

#+AUTHOR: Tassilo Horn
#+EMAIL: me@home
#+TITLE: This is the title

* Ex.: Relational Querying

#+BEGIN_HTML
<center><table width="40%"><tr><td>
#+END_HTML
#+BEGIN_SRC clojure
(defn grandparento [model grandparent grandchild]
  (fresh [child]
    (+->children model grandparent child)
    (+->children modes child grandchild)))
#+END_SRC
#+BEGIN_HTML
</td></tr></table></center>
#+END_HTML

  | grandparent | grandchild | semantics                                     |
  |-------------+------------+-----------------------------------------------|
  | ground      | ground     | predicate                                     |
  | ground      | fresh      | all grandchildren of grandparent              |
  | fresh       | ground     | all grandparents of grandchild                |
  | fresh       | fresh      | all grandparents with all their grandchildren |