Scope note: This class comprises physical objects that carry one or more instances of F24 Publication Expression. Examples: The physical features created on my PC’s hard drive when I clicked on the link , and thus downloaded a reproduction of the electronic file titled ‘Definition of the CIDOC Conceptual Reference Model… version 4.0’ that is stored on the ICS FORTH’s servers in Heraklion, Crete (F53). Any copy of the modern reprint publication of Marin Mersenne’s ‘Harmonie universelle’, Paris, 1986, ISBN ‘2-222-00835-2’ (F5).