The descriptor formatGenerations identifies the particular use or manner in which a version or rendition of a media item is used, e.g., Audio/Narration or Moving image/Backup master.
Best practice
is to select from a picklist of values.
The terms used identify the general type of media (e.g., audio, moving image, static image, artifact, text, container) and associated generational renditions usually associated with the media type.
OBLIGATION
TO USE
Mandatory if Applicable
REPEATABLE
ELEMENT
Apply once within its container, pbcoreInstantiation (which itself can be applied multiple times for each rendition of a media item)