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    Possible to change fixed fields with GDC?

    • Product: Voyager
    • Relevant for Installation Type: Multi-Tenant Direct, Dedicated-Direct, Local, TotalCare


    Global Data Change (GDC) documentation suggests that items in fixed (control) fields can be changed using GDC - for example, changing "type of record" and "bibliographic level" in the leader. Is this something that can be changed? 


    Yes. There's a consequence called "Replace String At Position" that lets you specify a byte in a fixed (control) field and enter a new value for it.

    This applies to fixed fields in both Bibliographic and Holdings records.

    For example, if you wanted to update "type of record" to e for a set of records, the consequence would look something like: 

    Consequence: Replace String At Position 
    Control Field: LDR 
    Replace String at Position: 06 
    With string: e 

    Be aware that Global Data Change will not verify the new string is valid encoding, so be mindful of that.

    Additional Information

    Example: SingleToMultipart.dslr

    MARC fixed fields are 0-indexed - positions start at 0, not 1. See the GDC User's Guide for details.

    • Article last edited: 16-Nov-2017
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