How XMLMerge works
XMLMerge recombines multiple XML files with their common ancestor, analysing their structure and running custom rules to either merge or explicitly mark-up the differences.
Its algorithms work through each of the files in turn, examining their structure to match-up all the corresponding elements with the original.
Once it has identified all the differences, XMLMerge then will allow you to manually accept or reject changes or apply custom rules to automatically determine whether to merge your changes or mark them up in the output file as unresolved changes.
The results are passed through a pipeline so you can transform the XML into whatever form is required by your systems or processes. This is all managed through the XMLMerge API.