apparently XML namespace support got changed in WinRT's take on XAML. So, is there a way to use a URI as a namespace in WinRT? Example:

```
xmlns:mine="http://myuri"

```

and have the `mine` namespace point to one of my assemblies? I've seen how this is done in [Silverlight](https://stackoverflow.com/questions/2517577/how-does-the-default-xml-namespace-work-in-xaml). Now how does it work in WinRT?