The system allows for the management of minor versions (doctype version 4.x) where "x" the number of the increase, and for major versions (doctype version y.6) with “y” being the number the documents in the system are increased by. The smaller versions are used to indicate minor changes in the documents, while older versions are used to indicate significant changes in a document.
When a new version is generated, previous versions are automatically archived. These versions are available to users for reference. The system also allows comparisons between versions (metadata, attachments, though not the content of the documents themselves) and the ability to restore a version that has already been created.
For detailed information https://athento.atlassian.net/wiki/pages/viewpage.action?pageId=21069918