When you retrieve an object from a namespace that supports versioning, you get the current version by default. You can retrieve an older version of the object by specifying a version ID or ingest time. You can also retrieve multiple object versions by specifying a range of version IDs. To determine the ID to use, you can retrieve an XML listing of the available versions of the object.
When you list versions, the list includes the system metadata values for each version. You can retrieve the system metadata for an individual version by specifying the version ID in the command that checks for object existence. You can retrieve both the custom metadata and system metadata for an individual version by specifying the version ID in the command that retrieves custom metadata. You can retrieve the ACL for an individual version by specifying the version ID in the command that retrieves an ACL.
For information on:
•Retrieving versions, see Retrieving an object or multiple versions of an object.
•Listing versions, see Listing object versions.
•Retrieving system metadata, see Checking the existence of an object or multiple versions of an object
•Retrieving custom metadata, see Retrieving annotations for objects and versions
•Retrieving ACLs, see Retrieving ACLs for objects and versions
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