Fair enough, but how do I see which DTDs are being used by Oxygen so I know where to apply changes?

I'm using oxygenxml 12. "edit profiling attributes > configure profiling attributes..." allows me to set up new ones, but when I apply them to a topic document, I get a validaiton error: SystemID: /home/nate/Oxygen XML Editor 12/samples/dita/garage/sequence.ditamap Engine name: Xerces Seve...