I am currently learning how to use the [symfony2](http://symfony.com/) framework.

Going through the [cook book](http://symfony.com/doc/current/cookbook/index.html), I am starting to have a basic understanding of how everything fits together.

However, I have 2 questions regarding Entities, which I believe are models in the MVC pattern:

* In the documentation, there seems to be a lot of talk about entities using doctrine as ORM. If I have an entity/model that does not require any ORM, is this still considered an "entity"?
* In most tutorials I have seen, entities are often all thrown into a folder called "entities" under the application bundle. With many entities in an application, I feel that this can become quite messy and unorganized. How can I group and organize entities?

Cheers :)