Ilya Shlyakhter <ilya_shl@alum.mit.edu> writes:

>>Yes this is possible, see the "org" argument to the "comment" header
> argument http://orgmode.org/manual/comments.html.
>
> Right, I saw that, but it has the following limitation:
>
>>The text is picked from the leading context of the tangled code and is
> limited by the nearest headline or source block as the case may be.
>
> I want all text from the Org file included, not just "leading context up to
> nearest headline".

The above text means "per code block", so the entire file is exported.

> I also want the hierarchical structure of the included text preserved,
> as done by ASCII export.

Please try to tangle the attached file, I believe it is what you want.

> (E.g. I want to include high-level documentation and description, as
> goes at the top of an elisp file, and which can be broken into
> sections/subsections/etc -- not just local documentation before a
> given code block).  Is that possible?
>

Yes.

Best,