Little XML delta question

I'm almost done with the XML delta output editor. One question:

If I get a call to change_dirent_prop, I'm supposed to output
something like:

        <add name='whatever'>
         <prop-delta>
          <set name='name'>value</set>
         <!-- and later, when we go on to something else -->
         </prop-delta>
        </add>

But how do I know whether to output "add" or "replace" at the top?
Does it particularly matter?
Received on Sat Oct 21 14:36:10 2006