I think what this graph shows is, contrary to what the text alludes, the VCS use for Debian packaging. There was no standardized way to declare that until late

I think what this graph shows is, contrary to what the text alludes, the VCS use for Debian packaging. There was no standardized way to declare that until late 2006, and it was offically documented only in 2008: https://bugs.debian.org/391023 https://bugs.debian.org/391023