I am currently generating XML from my one source of truth and save it as an EDMX Entity Framework file, and then use the object EntityClassGeneratorto create classes from the diagram. Is there a way to generate classes without first creating an XML file?
EntityClassGenerator
I have not heard from Ladislav Mrnka, so I will put his comment here as an answer. Using the Entity Framework new Code-First , I can have a code-oriented development process where my generator will create POCOs and custom DbContext, and then my database will be created from POCOs, using the convention instead of the configuration. No need for EDMX at all!
Here is a good explanation: http://weblogs.asp.net/scottgu/archive/2010/12/08/announcing-entity-framework-code-first-ctp5-release.aspx
EF EDMX . CodeModel - , EF , , ..
Fabio Scopel has a webcast on youTube where it shows this beta tool (then) called the Entity Framework Reverse Engineer.
Check link Entity Framework 5.0 - Code First Reverse Engineering existing database