Proper Documentation for ESO Events?

[Supplier]

Are there any proper documentation for all the ESO API Events in the ESO UI Wiki? I am having a hard time understanding how some of the events are triggered. For example, what would be the difference between:

EVENT_ACTION_SLOT_STATE_UPDATED and EVENT_ACTION_SLOT_UPDATED?

There are a lot more I don't really understand. Clicking on them only leads to an empty page. Is is mostly just guess-work and experimentation? Or is there a page that explains it better? Sorry if it has been asked before. I tried searching in the forums and google, but did not an answer.

Thank you.