Versioning state
Image of database content recorded at a certain point in time. Individual models, several models, or all models of a database that are available at the time of versioning can be versioned. The versioned content of a database is summarized in a change list. A versioning state can include models of different versions with different or identical version numbers that represent a specific state.
Workspace represents the state of models and/or objects that is editable and has not yet been versioned.
Current version or last version contains the changes that were last versioned. It contains the revisions associated with the last change list number.