I've been away from Dendron and the Discord for a couple of weeks and so much has happened! I thanked @User in the Announcements (hope that was ok) and what I want to say here is – given the progress with transclusion and exporting and so on, I would just suggest taking a note of the history of work in this area (e.g. SGML, XML, Docbook, Asciidoc). Not to get weighed down by it, but a little look at Asciidoc and modular Docbook might give you a sanity check on what Dendron could and should support, and how it can be represented. Having said that, you're motoring so fast, and doing things so elegantly that maybe there's nothing to learn there.