RDFXML n3 Pane redesign (ideas) #685

Created this ticket from @bourgeoa comment on another ticket I closed so it didn't get lost.

RDFXML.pane like n3 pane are not éditable. They just offer different RDF serilisation of parsing a Resource.
Questions:

for what purpose ?
shall we add jsonld
for html Resources shall we give access to RDFA, data-islands ?

Also, wondering the intention with these panes as well as the internal pane, data content, human readable, pad pane, schedule pane, imagepane and formpane as I didn't see them in the new design.