Hi, At this sentence So, it does not know what the 245$a means, neither what 200$f (those 2 fields being both the title in MARC21 and UNIMARC) It should read as 200$a instead of 200$f This sentence is found at 4. Catalog Administration Chapter 2. Administration 4.1.4. Edit Framework Subfields You may find this information from UNIMARC official site. http://www.ifla.org/files/assets/uca/unimarc_updates/BIBLIOGRAPHIC/u-b_200_u... -- Wishing you all the best. . . . Anthony Mao 毛慶禎 ＋886 2 29052334 (voice) + 886 2 29017405 (FAX)