On Wed, Aug 31, 2022 at 4:19 PM Sébastien Miquel <sebastien.miquel@posteo.eu>
wrote:

> Hi,
>
> I've been using tags on special blocks, src blocks and other, for two
> purposes:
>
>   1. to control which blocks get exported, using the `#+exclude_tags`
>      property.
>   2. to fine tune the export, according to tags, of special blocks such as
>      #+BEGIN_exercice                                            :hard:
>      …
>      #+END_exercice
>
> Does anyone think this is useful and might warrant adding support for ?
>

I think that using the #+header: property for something like this might be
more canonical.
https://orgmode.org/manual/Using-Header-Arguments.html

Example:

=====
#+header: :tags noexport
#+begin_foo
..
#+end_foo
=====

or

=====
#+header: :tags hard
#+begin_foo
..
#+end_foo
=====

It's also relatively easy to parse these headers:

=====
(org-babel-parse-header-arguments (car (org-element-property :header
special-block)))
=====