Suppose that I would like to define my own markup format, something that is not currently supported by pandoc. I could in theory write my own reader and writer in Lua, making use of pandoc's AST elements, and would then be able to convert to and from this new format to other recognized formats.
I'd like to know whether the same can be said of bibliographic formats. Suppose I have a new one that I would like to bake into pandoc. Since the bibliography seems to be decoupled from the AST, what would be the best way to do this?