The documentation about inheritance is misleading, it states:
The various inheritance strategies are not supported by Hibernate OGM, only the table per concrete class strategy is used. This is not so much a limitation but rather an acknowledgment of the dynamic nature of NoSQL schemas. If you feel the need to support other strategies, let us know (see Section 1.2, “How to contribute”). Simply do not use @Inheritance nor @DiscriminatorColumn.
True is, Inheritance works except for the JOINED type. We should clarify this.