Ok thanks a lot for your answers, I made the function, if ever it can
interest someone one day


(defun org-get-tags-with-hierarchy-at-point()
      "Return the list of tag WITH the sub-tags if they exist at point"
      (interactive)
      (let ((tags-heading (org-get-tags))
            (tags-result '()))
        (dolist (tag tags-heading)
          (dolist (tag-to-add (org-tags-expand tag t))
            (push tag-to-add tags-result)
            )
          )
        (delete-dups tags-result)
        )
      )

Do not hesitate to change the "tags-heading" variable to select a different
heading

Thanks again for your answers !

Le jeu. 1 sept. 2022 à 09:03, Ihor Radchenko <yantar92@gmail.com> a écrit :

> Cletip Cletip <clement020302@gmail.com> writes:
>
> > Just one last clarification to be sure: there is no native function in
> > org-mode to have the list of tags with a hierarchy? I have to write my
> > function with the two functions
> > org-get-tags and org-tags-expand
> > to get the result I want : a list of tags that takes into account the
> > hierarchy defined by the "org-tag-alist" variable
>
> AFAIK, we have no such function.
>
> --
> Ihor Radchenko,
> Org mode contributor,
> Learn more about Org mode at https://orgmode.org/.
> Support Org development at https://liberapay.com/org-mode,
> or support my work at https://liberapay.com/yantar92
>