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There are some general rules that help define what the numbers used as field tags mean. The basic divisions of the MARC authority record are:
0XX Control information, numbers, codes
1XX Headings (authorized and reference)
2XX Complex “see” references
3XX Complex “see also” references
4XX Cross references (“see from” references)
5XX “See also” references
6XX Note fields
7XX Linking entries
8XX Alternate graphics
9XX Reserved for local implementation
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The notation “XX” is used to refer to a group of related tags. For example, “1xx” refers to all the tags in the 100s: 100, 110, 130, and so on. |
