Content item Status
The overall status of a content item is determined by the presence or absence of published and draft versions:
When the highest version number is that of a published item (1.0, 2.0, 3.0, etc), the content item is checked in.
When the highest version number is that of a draft item (0.5, 1.3, 2.1, etc), the content item is checked out.
When an item is checked out, no updates are permitted to any other versions: published, archive, or archive draft. Also updates to the current draft are permitted to that draft only for a user with Version Document permission to that item’s security class. Further, if there is a draft owner, updates are permitted only by the draft owner.