Generated xmlns="$LOCAL_SCHEMA$" directive for a xml document

Hello.

I have created XML document using RIDER at the same project where XSD already exists.

While typing XML elements RIDER generated this xmlns attribute:

I could not find any information about that "$LOCAL_SCHEMA$". Where does it come from? How can I control it and are there any other directives I could use. For example, I would like to put an XSD at the very root of my project at refer to it from all XML documents in my projects.