UNIX permissions are richer than Windows file attributes, but Windows file attributes aren't a subset of UNIX permissions.
Of the four standard Windows file attributes -- Archive, Hidden, System, and Read-only -- VisionFS supports the Read-only attribute. The other attributes don't map onto UNIX permissions.
The Read-only attribute of a Windows file is set if the user accessing a share isn't allowed to write to the file, according to the UNIX permissions.
Similarly, changing the Read-only attribute in Windows sets or clears the UNIX write permissions for owner, group, and others.
Remember that even if the access rights for a user allow a particular action, the UNIX permissions determine whether that action succeeds or fails.
Windows NT Access Control Lists aren't supported on most flavors of UNIX, and aren't supported by VisionFS.