Hi Ihor,

> This is all defined in org-element-object-restrictions together with
> other restrictions on what kinds of objects can be placed inside other
> elements and objects:
>
> (minimal-set ’(bold code entity italic latex-fragment strike-through
> 			     subscript superscript underline verbatim))
> (citation-reference ,@minimal-set)

Ah thanks! I wasn’t aware of that. I think this is something that should be
mentioned in the spec.

All the best,
Timothy