For Windows platforms, the vob-tag is the VOB's registered name and also its root directory-the pathname at which you as a user access VOB data.
For UNIX platforms, the vob-tag is the full pathname at which you as a user access a VOB.
When using Full Rational® ClearCase® with dynamic views, the VOB storage directory is activated by mounting it as a file system of type MVFS at the location specified by its VOB-tag.
On Windows, when using Rational ClearCase LT, a VOB-tag has a single component and begins with the backslash (\). For example, \myvob and \vob_project2 are valid VOB-tags.