MARC from Bokbasen
When using the Bokbasen SRU / OAI-PMH services, Bokbasen will return Marc records based on the specification from the Norwegian National Libary (Nasjonalbiblioteket).
Leader pos 05 contains information about whether the record is new or corrected.
Leader pos 17 contains information about whether the record is preliminary or full level.
Read more on the National library's website bibliotekutvikling.no: