[O] (org-element-property :title ...) not returning a string

[James Harkins]

I've got:

(defun org-scdoc-headline (headline contents info)
  "Transcode a HEADLINE element from Org to ASCII.
CONTENTS holds the contents of the headline.  INFO is a plist
holding contextual information."
  ;; Don't export footnote section, which will be handled at the end
  ;; of the template.
  (unless (org-element-property :footnote-section-p headline)
    (let* ((title (org-element-property :title headline))
           (allcaps (upcase title))
    ... blah blah

It's choking on (upcase...) because 'title' ends up being an element object, 
and *not* the value of the :title property.

Why?

http://orgmode.org/worg/dev/org-export-reference.html is not helpful in 
answering this question.

hjh