The "original source" from which the asset has been acquired (e.g. tapeless, ingest, nle, etc.) by the station.
This metadata is always set for metafiles during their ingest; available values include:
ActiveSync (AS) - Etere ActiveSync has acquired the asset media.
Asset form (AF) - The asset media was acquired through the Etere Media Library.
Conforming (CO) - The asset media has been acquired by conforming using Etere MAM.
External archive (EX) - The asset media acquired through the External Digital Archive service.
File transfer (FT) - The asset media acquired through an Etere DataMover transfer.
HSM Recatalogue (HSM) - The asset media acquired through the Etere HSM recatalogue function.
Import (IM) - The asset media acquired through an import.
Ingest (IN) - The asset media has been acquired using Etere Ingest.
NLE Transfer (NL) - The asset media acquired from a Non-linear Editing system.
Tapeless reception (TR) - The asset media was acquired through the Etere Tapeless Reception service.
Transcoding (XC) - The asset media acquired through Etere DataMover transcoding.
UDP Transfer (UP) - The asset media acquired through a UDP transfer.
Unknown (UK) - The asset media acquired from an unknown source (i.e. it is not specified).
NB: This field is associated by default with the "Etere metadata > MAM > Original source" item.