Data Version Management

Introduction

Only 1 new original representation can be ingested at the same time for a particular data object
The new original representation can still be rejected due to the standard validation rules (deduplication, fixity, virus scan, etc), in which case the old original representation still remains the reference.

To track whether an original representation is the latest accepted version, the following structural metadata fields are available

Field	Meaning

Field	Meaning
`Structural.Versioning.Version`	Starts at 1 and increases by 1 each time a new original representation is uploaded
`Structural.Versioning.Status`	`Untracked`: No additional original representation was ever uploaded; the status becomes `Head` the instant the second original representation is created `Head`: This is the latest successfully ingested representation `Tail`: These are the previously successfully ingested representations `Draft`: This representation is ingesting (version > 1) `Rejected`: The new original representation was rejected (version > 1)
`Structural.Versioning.Id`	For original representations, the value is the record ID of the data object For access representations, the value is the record ID of the original representation

The new original representations can be uploaded using the 3 existing mechanisms