A project folder under version control, with every version that was ever saved.
A repository is private or public. Every repository is private unless it is deliberately and exclusively meant for public content. A publication always points to a separate folder or a separate repository, never to the whole project folder.
Example from Module 2
The website gets its own repository; presentations and contact lists stay in the private one.
Module 2: “Protecting data: encapsulate and check”. In the Werkbank course room, with sign-in.