Definition and scope:

The variable data fields include fields 01X-9XX.  They are grouped into blocks according to the first character of the tag, which identifies the function of the data within the record.  The type of information in the field is identified by the remainder of the tag.  Each field is identified by a field tag in the Directory.  Within variable data fields, two kinds of content designation are used:  two indicator positions, stored at the beginning of each field, and a two-character subfield code preceding each data element within the field.

For information on a specific variable data field, select a topic:

(Shortcut:  For information on a particular field, use the Tag Lists to search by tag, subject area, or alphabetically.)

Tag range:

Field description:


Numbers and Codes

3XX, 5XX, 84X:

Note Fields

852, 856:

Location and Access Fields


Holdings Data Fields


Other Variable Fields

See also:

Variable Control Fields  (00X)

MARC 21 Format for Holdings Data:  Contents