title: Many to many in mongodb using spring configuration(annotation preffered)
body: <p>I'm modeling a schema. As I'm new to Mongo DB I've no idea on how to model a nosql db.
  Structuring a relational type db and using mongo on top of it does not allow me to use many to many mapping. </p>
  
  <p>Using Spring-data does provide support for one to many using <code>@DBRef</code> on top of the <code>List&lt;?&gt;</code>. But many to many is something I want.</p>
  
  <p>Any help will be deeply appreciated. Kindly prefer using code to explain. Or a demo structure to illustrate. Thanks in advance.</p>