Certain fields in Millennium bib records are protected during loading of records updated and modified by Backstage Library Works. Below is a list of Millennium fixed and variable fields that are protected.
This means that even if you make a change in these fields in a bib record between the time we extract records for sending and the time we load the records Backstage returns to us, your changes will be preserved.
Millennium fixed fields:
Language
Location(s)
Cat date
Bib level
Material type
Bcode3
Millennium variable (MARC) fields:
All numeric variable length fields, but particularly:
001 OCLC/vendor number
050 LC call number (field tags c and y)
086 SuDoc Number in the call number index (field tags c and y)
090 Locally assigned LC call number (field tags c and y)
099 Locally assigned other call number (field tags c and y)
970-972 Millennium- specific fields, part of the default setting for the load profile
856 Uniform Resource Locator
927 Local field used for miscellaneous licensing/ebook information
928 Field for ebook vendor/package information
935 Old NOTIS number
986 Alternative SuDoc number