ODM2 ActionType Controlled Vocabulary ODM2 Working Group A vocabulary for describing the type of actions performed in making observations. Depending on the action type, the action may or may not produce an observation result. Instrument deployment The act of deploying an in situ instrument or sensor that creates an observation result. This term is a specific form of the Observation actions category of actions, which is the only category of actions that can produce observation results. Observation A specific form of the Observation actions category of actions, which is the only category of actions that can produce observation results. This term should be used to describe an action that creates an observation result from deployment of an in situ sensor or instrument.