[OPEN-ILS-GENERAL] Can a second import update already imported authority records ?

[Repke de Vries]

This is 1.6.1 and we have staff client imported authority records but  
want to make changes to some of them.

The MARC authority records standard seems to facilitate such a scenario:
- in the leader in position 5 you would have "c" for "corrected"
- you keep the record ID or Control Number in  field 001 the same of- 
course for matching with the outdated authority record already in  
Evergreen
- in field 005 you would have a more recent date than the one in the  
outdated record

Or fulfilling our need to delete obsolete authority records in  
Evergreen by importing a second time with Leader position 5 set to  
"d" for deleted.

QUESTION:  trying these scenarios does not work: the staff client  
batch import simply refuses to do the import second time round and  
that seems to be it.

Can anyone help:
- is there an automatic overlay (and delete) mechanism for authority  
records by re-importing and how should the record look like
- if not: how can we update or delete outdated authority records


Thanks a lot,

Repke
IISG and PPL libraries, the Netherlands