Received

Books All, snapshot through 2006
note: Books All is records for books in all languages

Updating

By ID and date

     LOC records have these fields that facilitate updating:

            001    27016268
            003 DLC
            005 20050910172205.0

    The 001 field is the record identifier; the 003 identifies the record as coming from LOC.<br>
    The 005 is the latest update date.

    A record coming in with identical 001 and 003 but a later date should replace this one.

New vs. Corrected

     The MARC record Leader position 05 has the record status. This status is ONLY useful in LOC records (other library systems do not set this correctly. <br>

   'n' = new record   <br>
   'c' = corrected record<br>
   'd' = deleted record<br>
   (also 'a' and 'p', but those may not be of interest - they are variations on 'c')

    In the weekly files, it would be possible to select only new records based on this code, or to give new records priority for loading.