Storing metadata for ASP Dynamic Data in XML file?

Question

C++ / C#

Good afternoon!
The task is as follows:
- there is a web application based on ASP.NET Dynamic Data
- there is an assembly with a data model (Entity Framework edmx model)
Now, to control the display of data, the MetadataType attribute is used with a parameter in the form of a class name that describes the metadata.
It is necessary to move the metadata description to an external xml file.
What is the best way to do this?