Cataloger's Reference Shelf
MARC 21 Specifications for Record Structure, Character Sets, and Exchange
Media
Character Sets (Record Structure)
MARC 21 records are character encoded, including all lengths. In this section on Record Structure, elements may be specified as ASCII numeric characters, ASCII lowercase alphabetic characters, ASCII uppercase alphabetic characters, ASCII graphic symbol characters, ASCII control characters, ASCII blank character, ASCII graphic characters, or MARC 21 characters. The section on Character Sets defines the repertoire and encoding of each of these subsets of characters.
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