M4L Midi Generators and note expression, spec?

Hi all - referring to this: https://docs.cycling74.com/userguide/m4l/live_miditools/#creating-a-generator

I only see the ability to specify notes with a velocity expression. All notes live within a "notes" array and it seems to me there's gotta be a separate "cc" array to express such things as pitch bend, slide, etc. I can't find reference docs for the contents of the dict passed in and out of live.miditool.[in/out].

Can anyone point me to a spec?

Many thanks!