On Sun, Sep 22, 2024 at 05:15:25PM +0000, Ihor Radchenko wrote:
> <tomas@tuxteam.de> writes:
> 
> > I do see foo and bar (well, OK, :FOO and :BAR) with their values, but lots
> > of other (let's call them "built-ins") like :begin and :post-affiliated.
> >
> > How do I keep those apart? Or do I have to resort to running regexps through
> > the buffer?
> 
>    (defun org-element-headline-parser (&optional _ raw-secondary-p)
>      "Parse a headline.
> 
>    Return a new syntax node of `headline' type containing `:raw-value',
>    `:title', `:begin', `:end', `:pre-blank', `:contents-begin' and
>    `:contents-end', `:level', `:priority', `:tags', `:todo-keyword',
>    `:todo-type', `:scheduled', `:deadline', `:closed', `:archivedp',
>    `:commentedp' `:footnote-section-p', `:post-blank' and
>    `:post-affiliated' properties.
> 
>    The plist also contains any property set in the property drawer,
>    with its name in upper cases and colons added at the
>    beginning (e.g., `:CUSTOM_ID').
> 
> So, properties from the property drawer are always upcased.

Thanks for that, Ihor

I ended up regexping my was through (which brought about some other
advantages with it; I'm using those props to communicate with other
things outside, and there, keeping the keys's cases is a nice-to-have).

Actually, the case treatment of property names is one of the most
acute pain points in Org for me, but this ship has sailed :-)

Cheers & thanks again for your help.
-- 
tomás