Of course, some of the private, individual practice can be terribly formed and generally useless for many, so it becomes imperative that students have some strong modeling here from the rhetorical side. What exactly do "good" and "useful" practices look like? How are these annotations used after-the-fact? What purposes do they serve? Can they be reused? Even with open annotations, there is still a lot of additional practice and use which happens beyond the visible annotation which is hidden.

How can we leverage the open annotation and the following process (for example that of Ahrens2017 or Eco2015, 1977) to show more of the workflows of not only learning/understanding/sensemaking, but then taking that material to apply, analyze, evaluate, and then subsequently create new material?

I see a lot of this sort of community sensemaking in the fora for digital note taking tools like Roam Research, Obsidian, Tana, etc. People there may sometimes be more focused on workflows for productivity sake, but there's a lot of subtle learning about note taking practice which is also going on between the lines.

It is not consistent to distinguish different types of annotations (e.g., using "Annotation" as the general term) and at the same time to call a specific type with the same name. It mixes the general with the specific use.

I propose to use the term "Annotation" as the general term for all different kind of annotations. For the digital equivalent of a marginal note I would use "Marginal Note" as another name. (Just "Note" is not enough as it can't be differentiated from "Page Note".)

This is a great list of some common types of annotations for students just starting out, but it misses one key annotation that I think is the goal of all annotations:

New ideas from the reader that have been sparked by the writing.

Incidentally, this is also one of the more difficult types to create and it's also harder to model to students.

In some sense, many of these annotation types fall relatively neatly into Bloom's taxonomy with my addendum falling under the top level of the pyramid usually labeled "create".