[CentOS] CentOS ISO Build process

Hello the list,

For a personal use, I would be intersted in creating my own custom CentOS ISO.

For that, I would love to use the build process used for the the official ISOs generation.

Is the documentation about this release process and the relative tools and configuration files are available and public for CentOS 7 ?

If yes, where is it possible to find them ?

I found data on seven.centos.org and livecd-tools but I'm not sure if it is the real
used process.

Thanks for your answers

Regards,
Olivier Bonhomme