Difference between Revision and Version
Each time a document is updated, Nimbus automatically keeps the prior Version as a separate document. This way, the user can open a prior Version and look to see what the file contains.
Nimbus also includes many fields of Meta data which can be customised by the Business. The Revision field is a meta data field. Any value can be entered into this field, and Nimbus can then filter and find a document based on this value.