# Single instance
#+foo: *a*
#+begin_example

#+end_example

# Two instances
#+foo: *b*
#+foo: *c*
#+begin_example

#+end_example

# Single with optval
#+foo[*bar*]: *d*
#+begin_example

#+end_example

# Two with optval
#+foo[*bar*]: *e*
#+foo[*bar*]: *f*
#+begin_example

#+end_example