Hey, ctomc ,thanks for reviewing patiently my PR, I'll update as you comment on.
But since I added a new element in to ee.xml, I have two failed tests testTransformers712() and testTransformers713() in EeSubsystemTestCase, I notice that there is an ModelFixer to be used in  testTransformers712() to deal with issue in AS7-4892, then I modified ee-1.0.0.dmr and add to new ModelFixer to add my new element (which is wrong to do that), here ,how you deal with new element which does not exist in previous subsystem version? a reject checking?