With this intention in mind, I think I may have a recommendation? You might consider shorthand / expanding tokens? In my project, I have a couple of well-known nodes with a parent child relationship, such that it would be impractical to write out all of the link definitions separately. But there also needs to be a way to format the nodes in a way that makes logical sense to the markup writer, so I included a simple token - for those nodes only - that link them. On the backend, it goes through shorthand tokens first, then document placement, then into other parsing if those don't match. So, the idea is similar to the CSS values having multiple shorthands; the language just understands them all. It's a ton more work, but it's valuable for interop, which seems to be the whole purpose of generalized formatting like this.