The XML file is being transcribed verbatim to generate the form on the web page.
Perhaps literal fits better than verbatim, as the former denotes a looser correlation (in my opinion) than the latter, or maybe I'm just splitting hairs. Either way, neither of these really conveys my intended message. I'm looking for a word or expression that conveys an exact 1:1 correlation between everything in A and everything in B, but B is not actually a "word for word" copy of A. A and B don't have to be XML and a web page. You can think of them like apples and oranges. If you were going to generate an orange based on an apple (whatever that means), and every aspect of the apple would be reflected in an aspect of the orange that was generated...how would you describe the precision of that transcription or translation process?
I apologize if there are any issues with this question, or it is inappropriate for this stack exchange - this is my first time posting on this stack exchange.