There's a fragment from a GTD setup:
;; Explicitly load required exporters
(require 'ox-html)
(require 'ox-latex)
(require 'ox-ascii)
Cannot open load file.
They should be a part of org-mode, shouldn't they? No files like ox-html.el appear to be present on the system (Linux, Emacs 24.3.1). Google results are scarce and confusing. Do I have to install something?