The logic of a specific pattern syntax in
MARC Review has been updated. The pattern referred to involves one Tag and an Occurrence, and uses the 'Not' Rule; eg. 'Tag=020 Occ=2 Rule=Not'. In the past (and possibly this was by design, since we have traced the issue back many years), this pattern would identify every 020 in a file except if it is the second occurrence of 020 in a record. Using the updated logic, this pattern will identify every record in a file that does not contain a second 020.
The new logic is enabled by default. For more information, and/or to revert to the old logic, follow
the instructions here.
NB. This change does not affect MARC Global (nor any pattern specified as part of a MARC Global review)