Hi Javier ,

The information entity is often used as a bridge between two entities that have many to many associations. (Eg. Passanger - Booking - Flight ) Here Booking is an information entity. It also keeps extra information about this relationship . You can find a more detailed explanation about domain modeling from the link below. I hope it works for you .

https://www.mendix.com/blog/3-steps-to-building-your-data-model-in-mendix/

Regards

Ridvan