You can manage your documents by directory as normally all DMS do. You can share directory with the persons by adding them in users list. Users added to directory will have access to directory and realted documents of that directory.
You can manage your documents with all necessary details as shown in form view. List view also gives required details. Access to any document can given to any user by adding perticular user as follower in relatedd document.
Document managers can manage tags from this view esily. You can give color on tags.
AlmightyCS Document Management System
Just install this module to get Document Management Functionality. Not any extra configurations required.