Dear Karsten, The use of the element for the nationality of an individual person seems to me not the best solution. The element and or can not be used as siblings. If you use these elements together, the EAD instance will not be valid or very complex. EAD nor EAC-CPF have elements or attributes dedicated to this type of information. Although EAC CPF has been developed for the description of persons, you can use the elements in an EAD instance, e.g. as childs of the element . The nationality information you could mark with . Best regards, Henny van Schie Nationaal Archief Den Haag NL