@dateType Vocabulary

"dateType is an attribute that classifies by named type the date-related data of the element e.g., created, broadcast, dateAvailableStart.
Best practice: Used to clarify how the date is related to the asset or instantiation. Date Created may be the most common, but the element could also be used to describe the Date Accessioned or Date Deaccessioned, for example. Can be used as an attribute of the following elements: pbcoreAssetDate, instantiationDate."