[TYPO3-mvc] Enitites and Value Objects (Get into my brain, DDD!)

[Sebastian Gebhard]

Hi *,

me again.

Jochen already explained a bit about enitites and value objects in 
an/some other topic(s) but it's still not easy. Maybe it gets easier 
when I have my Model stuff finished and start coding business logic.

Anyway, maybe you can help me with the distinction in my actual real 
world case.

I have

- Brand Object, representing a car brand like Volkswagen. It only has a 
name.

- Category Object, representing the category of a car like Coupe. It has 
a name and a parentcat field (so it's hierarchical)

- CarType Object, representing a car model like Golf III. I avoided the 
term "model" in the Object's name to not get confused with MVC models. A 
CarType Object has a Brand and a Category

- Car Object, representing a real world instance of a car like the car i 
come to work with, having a chassis number. A Car has a CarType and a 
lot of other properties with no relations to other tables.

The Car Object obviously is an Entity. It Identity does not change when 
I drive home and the driven Km's have changed.

At all other objects I'm not sure.

Could you give me a hint?