This image is out of date: http://docs.jboss.org/hibernate/orm/5.3/userguide/html_single/images/architecture/JPA_Hibernate.svg

Reference:

1. https://github.com/hibernate/hibernate-orm/blob/master/documentation/src/main/asciidoc/userguide/images/architecture/JPA_Hibernate.svg
2. http://docs.jboss.org/hibernate/orm/5.3/userguide/html_single/Hibernate_User_Guide.html#architecture-overview
3. https://github.com/hibernate/hibernate-orm/wiki/Migration-Guide---5.2#hibernate-entitymanager-merged-into-hibernate-core