带有XML模型和LinqToXml的MVVM？

I've been reading up on the MVVM pattern, and I would like to try it out on a relatively small WPF project. The application will be single-user. Both input and output data will be stored in a "relational" XML file. A schema (XSD file) with Keys and KeyRefs is used to validate the file.I've been reading up on the MVVM pattern, and I