Is it possible to define an entity in one model and refer to it from another?

For example, separate models for PERSON, EMPLOYEE and LOCATION where EMPLOYEE  refers to PERSON and LOCATION.

It is currently not possible to share or copy an entity from one model to another model.

The solution would be to put the entities together into a single model but then to create multiple applications.

For instance, you can have one application for Person, which only exposes the elements associated with the  Person entity and then a separate application for Employee which can expose both Employee elements and any related Person elements.