Marcin Borkowski <mbork@wmi.amu.edu.pl> writes:

Hello, Marcin, all!

>> > I'd like to export an Org-mode file to /multiple/ HTML files.  For
>> > instance, I might want to convert all first and second level

...

> Thanks a lot!  Your code seems inspiring - I've only skimmed through it
> now, but e.g. the org-map-entries is something very useful I had no
> idea existed...

This might also be useful: https://github.com/iani/org-publish-meta
It seems to allow you to export subtrees to different projects. Hope
that helps!

Sacha