[NTG-context] Separate layout and content XML files?

I want to process documents from two separate XML files. One XML file defines the layout of the page ... placement of text boxes, fonts to use ... even placeholder text. The other XML contains the actual content that gets placed into that layout. Is this possible? Anyone have any examples of something like this? I'm a LaTeX user who's new to ConTeXt. I figured I can learn more quickly by starting with a "recipe" and modifying it to fit my needs. Thank you! -pd