Hey Chris! In the recent instantiation of Roam Book Club, we tried three primitives for syntopical reading: Questions, Terms, and Propositions. These were my interpretation of how they are discussed in How To Read A Book.

Looks like you have Questions already. Propositions could potentially be captured by Paraphrases, but Propositions are explicitly declarative (i.e. claims of the author or your own ones). Then Terms are words or phrases of import to the text that you define clearly. These need not be the exact words from the text(s), but rather a handle that you and those working with you use to refer to a particular concept.

I found that this worked well as a "bare minimum" for collecting notes around the books we were reading. I do note that the books were less fact heavy so we didn't have a dedicated fact primitive or proper noun one. Reactions were captured with emoji on blocks. Quotes were used to support the other primitives.