Expanding a variable from / inside (XML) source file in Ruby

I want some "dynamic" XML source files. I want some of the element values ​​to be dynamic or "expandable".

I am providing a value for this variable from another source.

@Name = 'freezingkiwis'

      

        
        
        
      

    

What I want to provide is something like this in an XML file:

<?xml version="1.0" encoding="UTF-8"?>
<Contact>
    <Name>#{@Name}</Name>
    <Addresses />
    <Phones />
</Contact>

      

        
        
        
      

    

When opening / reading a file (presumably File.new or File.read) I want to then "extend" the @Name variable I set earlier.

Is there something that will do this immediately for me, or will I have to parse this XML (perhaps now as REXML :: Document) and do it manually myself?

(maybe replace element value with this ...)

J