Directory
Character Position Definition and Scope:
The Directory consists of a series of fixed-length entries, with one entry for each variable field (control or data) present in a record. Each Directory entry is 12 character positions in length and contains three portions: the field tag, the field length, and the starting character position. The Directory immediately follows the Leader at the beginning of the record and is located at character position 24. The Field length and Starting character position portions of the Directory are defined by Leader/20-23 (Entry Map) as being 4 and 5 characters in length, respectively. Because a field tag is always 3 characters, the length of the Tag portion of the Directory is not specified in the Entry map.
Description of a Directory Entry:
/07 - 11 - Starting character position
Input Conventions:
Each Directory entry is system generated.
Related USMARC Field or Document:
USMARC Specifications for Record Structure, Character Sets, Tapes
See also:
USMARC Community Information Format: Contents
