kinds are not a singular thing, and they are not descriptive. they are a stupid number that tells you nothing and forces you to refer to some document that probably will change and refers to applications that are still alpha.

what the programmer who is building tools to generate and parse content needs:

1. encoding

2. semantics

3. protocol sequence

kind is all three of these in one, cloaked in a stupid number, and hosted very often inside a PR on a poorly managed specification repository. it's not descriptive, it's just cryptic.