Item-Type-Extension (1.0.10161.7.3) DEFINITIONS :: =
     
BEGIN
IMPORTS ILL-String FROM ISO-10161-ILL-1;
     
Item-Type-Extension ::= SEQUENCE SIZE (1..7) of Extended-Item-Type OPTIONAL
     
Extended-Item-Type ::= ENUMERATED {
        conference-proceedings (1),
        dissertation-or-thesis (2),
        music (3),
        official-publication (4),
        patent (5),
        report (6),               
        translation (7)
        }
     
END