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June 2016

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Subject:
From:
Terry Reese <[log in to unmask]>
Reply To:
MarcEdit support in technical and instructional matters <[log in to unmask]>
Date:
Wed, 29 Jun 2016 14:33:46 -0400
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I find that many local ILS systems will change by 23 because its undefined.  22 actually has a real defined purpose in MARC21, though local systems can do crazy things.

--tr

-----Original Message-----
From: MarcEdit support in technical and instructional matters [mailto:[log in to unmask]] On Behalf Of Joseph Frawley
Sent: Wednesday, June 29, 2016 2:27 PM
To: [log in to unmask]
Subject: [MARCEDIT-L] help understanding MARC leader (4500 in pos 20-23)

This question may be slightly off topic, as not directly related to the Marc Edit software, but I'm hoping I can find some help from those more knowledegable than I about marc record structure.

We have identified a large group of records in our database that fail to load when we export them to our discovery layer/catalog. The reason is the record length, and usually has to do with the last portion of the leader, position 20-23.  

Library of Congress' documentation on MARC 21 communications format indicates that pos. 20-23 ends with "4500".  But is this always the case?  Is there ever a valid reason for it to contain anything else?  And what do the digits 4500 signify?

We are considering doing a global data change to correct all these records that do not end in 4500 in the leader, but I want to understand the implications of that, and wonder if I could possibly be doing harm without really understanding what I am correcting and why.

Thanks to anyone for any insights,

Joe Frawley
Connecticut College
Phone: 860-439-2670
[log in to unmask]

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