One way is through a filter. In the filter function you get an info argument that contains the information you want. I hacked this together and it does add a tooltip to the link, but it is not elegant or obvious, and it does not do any checking for the type of link, whether an attr exists, etc.
The gist is that it looks like you can get the parent from the parse-tree info, and get the attr_html info from that (which is a list of strings). Then you have to modify the "data" in the filter function which is the html. It is easy here to just replace the <a with <a attr_html, but a more complex transformation might require something more clever. Maybe this is a start to get where you want. the cite link is an org-ref link, but I think this should work on any kind of link. #+attr_html: title="I am a tooltip" cite:schuett-2018-schnet * build :noexport: #+BEGIN_SRC emacs-lisp (defun ox-html-link-filter (data _backend info) (let ((link (car (org-element-map (plist-get info :parse-tree) 'link 'identity)))) (replace-regexp-in-string "<a " (concat "<a " (s-join " " (org-element-property :attr_html (org-element-property :parent link))) " ") data))) (add-to-list 'org-export-filter-link-functions 'ox-html-link-filter) (browse-url (org-html-export-to-html nil nil nil t)) #+END_SRC John ----------------------------------- Professor John Kitchin Doherty Hall A207F Department of Chemical Engineering Carnegie Mellon University Pittsburgh, PA 15213 412-268-7803 @johnkitchin http://kitchingroup.cheme.cmu.edu On Thu, Jan 31, 2019 at 5:36 AM Tarjei Bærland <tarjeibaerl...@gmail.com> wrote: > Hi! > > I have a custom function for exporting image links in org-mode (I have my > html exported to the parent folder of my .org files, and I just want to > keep one copy of the image files). > > How can I get the "attr_html" of the link for a custom > org-set-link-parameters function? As far as I can tell, the :export wants a > function taking (path desc backend), and I do not know how to extract the > parent of the link from this. > > Thanks in advance! > > Regards, > Tarjei >