Explain what is an embeddable and how to map it. Reference to [Doctrine documentation](http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/tutorials/embeddables.html), try to avoid duplicating it, but always emphasize differences if they exist.
Explain what is an embeddable and how to map it.
Reference to Doctrine documentation, try to avoid duplicating it, but always emphasize differences if they exist.