In an earlier discussion, people raised the issue of fontification and previews.
But I'm wondering what Nicolas has already implemented, and what he or others might still add. Details: John Kitchin (based on his experience with org-ref): https://lists.gnu.org/archive/html/emacs-orgmode/2021-04/msg00438.html He suggested a green face for known references, and red for unknown. I think Nicolas implemented this basic idea somewhere, but I am not noticing it; I don't see any difference with incorrect keys. John also suggested a tooltip preview of the roughly formatted reference. Again, I thought Nicolas had earlier implemented this, but I don't see it ATM; hovering over keys doesn't do anything. AndrĂ¡s Simyoni: https://lists.gnu.org/archive/html/emacs-orgmode/2021-04/msg00289.html He was thinking about using citeproc-el to attach some kind of preview as well. "I'm thinking about implementing a "fontification" solution which would use citeproc-el with a standard style to produce nice preview-like representations of the citations in the buffer. This would require basically the same pieces of information as citation export I think, although it might be made strictly local, working only with the single citation object plus the bibliography information." Timothy: https://lists.gnu.org/archive/html/emacs-orgmode/2021-04/msg00456.html He was thinking about previews as well, with overlays: "I think what would be ideal, would be if common citation styles could define a method which produces a display string, like "Goaziou et al. (2021)". If nothing is defined, then no overlay should be produced." And my reply to him, based on the example of Zettlr: https://lists.gnu.org/archive/html/emacs-orgmode/2021-04/msg00462.html I think that example would imply overlays as well, though I don't really understand all the technical details or org-specific pros and cons (tooltips vs overlays and such), but am just wondering: 1. what is already included, and what should ship default? Perhaps Andras' idea would fit for oc-csl, since it already depends on citeproc-el? 2. if some is not included, say preview, how would one add that? I assume the API supports it; so one would just install, say, a little package and add that as a "follow" processor? And one could add multiple such processors? Bruce