Yeah, there's no agreed convention on how the infoset of an XML document (which I should have used rather than DOM) ought to be represented in JSON, and general

Yeah, there's no agreed convention on how the infoset of an XML document (which I should have used rather than DOM) ought to be represented in JSON, and generally people don't do it (e.g., RDF/JSON isn't a direct mapping from RDF/XML, but a new format to express the same basic facts), it's just technically possible.