How to define an Action Potential?

Dear electrophysiologists,

If you could spare about 5 minutes of your time, the INCF electrophysiology task force is attempting to survey the landscape of definitions of the action potential. The main interest here is to determine how working physiologists view it, is it an event, property of the membrane or a process?

The following link will take you to a google-survey, click here or follow this link:
https://docs.google.com/forms/d/1RjFbxxQ1APZ-wZ3qRudgLMF7B6x6C0E5QhATqd4JYxQ/viewform?sid=afb1a6cad01cf6e&token=3MImFj0BAAA.ISZ-71P88ISEhUfd4WLe_Q.mHMDtq5u5_29UwuZ1EYquw

The results will be stored on a google spreadsheet and the answers will be used to design a relevant knowledge model to describe electrophysiology data with the Experimental Neurophysiology Ontology (ENO).

Thank you in advance for any help you can provide.