Guidelines for Usage: 642 Series Numbering Example

NACO LSP Usage:

In a single 642 field, a subfield $5 containing the NUC symbol for the Library of Congress (DLC) precedes a subfield $5 containing the NUC symbol for an LSP participant. Only the NACO LSP participant creating a Series Authority Record may record its series numbering example in field 642 or add its NUC symbol to the field 642 containing the series numbering example for the Library of Congress.

When a pair of 642 fields are appropriate because an LSP participant's series numbering example differs from that of the Library of Congress, the 642 field representing the Library of Congress example precedes that of the LSP participant.

Inclusion of the 642 field relating to the NACO LSP participant is optional unless the participant is also contributing a bibliographic record related to the series. When field 642 is used, it must contain a subfield $5 to identify the user of the example in subfield $a.

LC Usage:

There is no special LC practice for this field.

For more information on LC Guidelines, select:

Guidelines for Usage: NACO/LSP and LC