Blueprints dynamic recepies

Hello !
There is a big lack of documentation about blueprints power.
I mean, recepies about :

• page type blueprint
• create a parent blueprint useable with dynamic property value (parent route, template name, default access (site login etc... values in header)

This way we coudl create acces inheritance, easily.

It takes too much time to figure out how it works.

Thanks a lot in advance.