Note: In the context of Qt MVC, a Proxy Model is a Model Pipe design.
Replaces a model and acts according to the Proxy pattern. Useful for Network communication, to load lazily information from the database or disk.
a proxy model can also prevent data copying. For example, it can map indexes (e.g. pipe filter)
You can obtain the data from a broad choice of technologies: http request, sql query, rmi, rest.