1.3 is a newer revision than 1.1. The lines value is the number of lines of text added to the previous revision, and the number of lines of text removed from the previous revision. Labels Labels are names that apply to a certain set of revision numbers, one per file. You can then recreate the source tree for the beta at any time afterwards. If you were now working on version 3 of the product, and wanted to see what was in Beta 4, you could check out the files as they existed when Beta 4 was produced.
Labels are also handy development tools.
You can make a label of the current set of revisions before you make radical changes. If the changes don't pan out, you can easily revert to the label you created and start again. In many probjects, you'll end up branching your files. That just means that a particular revision can become the base revision for more changes. As a concrete example, say you have a source.c file.