The documents you upload through Chatter have a set of properties that you can see and interact with.
- Display and Edit Document Properties
Display detailed document information and update document properties. - Document Properties
a description of the properties in alphabetical order that are stored for each document in the document library. - Change Document Authors
Since documents are stored in folders that control user access, documents do not have owners like other types of records, but they do have authors. The author represents the user that originally uploaded the document file.