Definition and scope:

A cross reference is used to refer between classification numbers that are constructed according to the classification scheme that is identified in field 084 (Classification Scheme and Edition).  It leads from an invalid classification number to a valid classification number or from one valid classification number to another valid classification number.  Tracings or reference note fields are used to direct the user to another classification number, often for specific aspects of a topic.

Complex cross references are carried directly in records as reference note fields (253 and 353).  They are used when relationships exist between classification numbers that cannot be adequately conveyed by one or more simple cross references generated from 453 or 553 tracings.

Simple cross references are generated for display from tracing fields (453 and 553).

Specific field information:

For information on content designators (indicators and subfield code definitions and examples) field and subfield repeatability, and input conventions for any of the 2XX-5XX fields, select from the list below:

Tracings and References - General Information

253  Complex See Reference  (R)

353  Complex See Also Reference  (R)

453  Invalid Number Tracing  (R)

553  Valid Number Tracing  (R)

See also:

Variable Data Fields