If you want to Learn more about Tizen Common and it relationship with Tizen, then we have a very useful resource for you in the shape of a video by Dominig ar Foll, Senior Software Architect at Intel.
Tizen Common is a common base for multiple profiles (e.g. Mobile, IVI, etc.) and provides a platform for developers and integrators. This webinar will give you an in-depth look at the Tizen Common Project. You will first be introduced to the motivation for Tizen Common before learning how you can create a new Tizen profile. You will also see a specific example/use case of a profile with Tizen IVI - Dominig ar Foll