Notation used when referring to file versions

SNiFF+ uses the following notation when referring to different versions of a file:

- version tree -- A graphical presentation of a file's "evolution" from one version to another.
- INIT -- The symbolic name given to the initial checked-in version of a version controlled file. The version number of the initial version is

1.1 .
- HEAD -- The symbolic name given to the latest checked-in version of a version controlled file. On a branch, the latest version is given the symbolic name
HEAD_<branch_name> , where <branch_name> is the symbolic name of the branch.
Here's an example of a file's version tree containing both INIT and HEAD versions.