Changelists

The unit of file submission is the changelist; it is the means by which you check files in and out of the depot. A changelist must contain at least one file and might contain tens of thousands. A changelist is numbered and allows you to track all changes with respect to the contents of the depot: file modifications, the addition of a file, or the deletion of a file.

A changelist is the simplest way to organize your work. A changelist also represents the atomic unit of work in Helix Core Server: if a changelist includes several files, changes for all the files are committed to the depot or none of the changes are. For example, if a network connection between the client and the server fails during changelist submission, the entire submit fails.