For MARC21 setups the default sys prefer ISBD doesn't create a standard ISBD in title area. Now the default is: #245||{ 245a }{ 245b }{245f }{ 245g }{ 245k }{ 245n }{ 245p }{ 245s }{ 245h }|\r\n #246||{ : 246i }{ 246a }{ 246b }{ 246f }{ 246g }{ 246n }{ 246p }{ 246h }|\r\n #242||{ = 242a }{ 242b }{ 242n }{ 242p }{ 242h }|\r\n #245||{ 245c }|\r\n #242||{ = 242c }|\r\n We mix 245 tag in 242 (Translation of Title by Cataloging Agency) and 246 (Varying Form of Title). I think is very difficult to have valuse in 242 and/or 256 with an empty 245. I suggest to insert only #245||{ 245a }{ 245b }{245f }{ 245g }{ 245k }{ 245n }{ 245p }{ 245s }{ 245h }|\r\n #245||{ 245c }|\r\n in default sys pref ISBD