Authority Tutorial
Table of Contents: Introduction Getting Started! What does MARC mean? Authority Terms Authority Records Glossary
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By combining information from the two preceding charts, it becomes evident that if, for example, an authorized heading is for a corporate body, the tag will be 110; if a “see also” reference contains a corporate name, the tag will be 510. A 451 tag indicates a “see from” reference for a geographic name.

1XX Headings (authorized and reference)
4XX “See from” references
5XX “See also” references
7XX Linking entries

X00 Personal name heading
X10 Corporate name heading
X11 Conference name heading
X30 Uniform title
X48 Chronological term
X50 Topical subject heading
X51 Geographic name heading
X55 Genre subject heading
X80 Topical subject subdivision
X82 Chronological subject subdivision
X85 Form subject subdivision