Some organization names are present twice in the Norwegian Authority File, with one post referring to the current name / organization, and the other referring to a previous instance.
This information is written in free text, in different ways ("Gjelder fra YYYY", "Gjelder perioden YYYY-YYYY", "Gjelder til DD.MM.YYYY"...), in MARC field 678a or 680a. The text_outdated method looks for simple patterns in these fields. It does not catch all instances of outdated posts, but has given high enough accuracy in tests.
Some organization names are present twice in the Norwegian Authority File, with one post referring to the current name / organization, and the other referring to a previous instance. This information is written in free text, in different ways ("Gjelder fra YYYY", "Gjelder perioden YYYY-YYYY", "Gjelder til DD.MM.YYYY"...), in MARC field 678a or 680a. The
text_outdatedmethod looks for simple patterns in these fields. It does not catch all instances of outdated posts, but has given high enough accuracy in tests.