Hello,
I've attached a patch for the Advanced configuration (for exporting) chapter of the Org mode manual that extends the hook example there to provide the commonly requested ignoreheading-like functionality found in the Beamer backend. The example is very simple and adds just one line of code to the function thanks to the MATCH argument of the `org-map-entries` function.
The commit message contains the TINYCOMMIT cookie as I'm not a FSF member.
Originally I only intended this solution to be an answer to questions on StackOverflow that did not help me much (
http://stackoverflow.com/a/29588450/4779220), but I think it is something very commonly requested and should be documented and easily accessible.
How I discovered this solution:
I've always liked the `ignoreheading` tag functionality in Beamer export. I wanted to have something like it for all export backends.
The solutions I found on the Internet either didn't work or were filter based which did not remove the headline nodes in the parsed structure.