locked (or checked-in)
file is located in the r4data and/or uncook data only.
allowed operations: check-out, copy, export. Locked files are read-only.
checked-out
the file is in the workspace directory and in r4data/uncook.
allowed operations: revert, copy, export, edit, save. These files can be edited by the user. When the files are saved, the workspace version will be updated, but not the one in r4data/uncook.
added
the file is in the the workspace directory only
allowed operations: revert (=delete), copy, export, rename, cut, edit, save. These files are created by the user, so they can do basically anything with them.