...
- XML: Fedora objects' XML and the schema upon which they are based are preserved at ingest, during storage, and at export
- Content Versioning: Fedora repositories offer implementers the option of versioning data objects. When a data object is versioned, the object's audit trail is updated to reflect the changes made to the object, when the change was made and by whom and a new version of the modified data is added to the object's XML. This new Datastream cascades from the original and is numbered to show the relationship between original and version. This allows users to retrieve older versions of a data object by performing a date/time search and retrieval, or the most current version if the date/time criteria are not included in the search.
- Object to Object Relationships: Relationships between objects can be stored via the metadata included in the objects. This allows implementers to link together related objects into parent/child relationships.
- Event History: Every object in a Fedora repository contains an audit trail, which preserves a record of every change made to the object.
For more information on digital objects in Fedora, read this article.