The way you use the view tag is different for each type of view:
You do not refer to the view tag when performing most Rational® ClearCase® operations. Instead you usually refer to the path of the view.
The root directory of the snapshot view contains a file, .view.dat, which provides information that is used to perform operations on the files in the view. When the .view.dat file of the view is found, it can determine the view tag of the view. (If you delete the .view.dat file inadvertently, you can regenerate it.)