title: Is there any way to split a huge EDMX?
body: <p>I have an Entity Framework 5, DB-First project, with over 400 tables in the schema.  When we make changes to the schema, it's difficult to view the diffs because the EDMX file is so huge.</p>
  
  <p>So a long shot: is there any way to split the edmx file into multiple files, in the same way that you can have partial classes split across multiple files?</p>
  
  <p>Alternatively, is there some way of splitting the EDMX into multiple diagrams, e.g. different conceptual sections of the schema could be defined in different diagrams - though we would need to share some tables between different diagrams then, in order to have all associations properly defined?</p>