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<?xml version="1.0" encoding="ASCII"?> <familytree:FamilyTree xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:familytree="http://www.example.org/familytree"> <members/> <members/> <members parents="//@members.3"/> <members children="//@members.2"/> <members/> </familytree:FamilyTree>