self.slot->forAll(sl : SlotType1 | sl.name.oclIsUndefined() or sl.name='creationTime' or sl.name='hash' or sl.name='languageCode' or sl.name='repositoryUniqueId' or sl.name='serviceStartTime' or sl.name='serviceEndTime' or sl.name='size' or sl.name='sourcePatientId' )