(self.slot->select(sl : SlotType1 | (not sl.name.oclIsUndefined()) and (sl.name = 'URI'))->size() < 2)  and 
self.slot->select(sl : SlotType1 | (not sl.name.oclIsUndefined()) and (sl.name = 'URI'))->forAll(sl : SlotType1 | (not sl.valueList.oclIsUndefined()) )