Thas the test fixture. The ORM and ODM SeoMetadata are both mapped as xml in the doctrine-model and doctrine-phpcr folder. That's the reason for the mapping. But your hint for the custom table brings me back to the point where i wanted to create the ORM SeoMetadata as mapped-superclass inside of the `Model` namespace. By doing that the user should be able to do an empty extension and map do a custom table mapping.