NACO Participants' Manual -3rd Edition - Library of Congress

667 Field(Nonpublic General Note)The 667 field is used to give information of permanent value and general interest tocatalogers. Separate 667 fields may be given in any order.In current practice, the 667 field mainly records practical information about the use or statusof the heading. The record number of an undifferentiated NAR that previously covered theheading appears here. Policy specialists, especially those working with series authorities, inthe CPSO, Library of Congress, frequently include “message notes” in this field in order torecord the work they are doing with the record. A final use is to record a former heading,whether or not it is AACR, that is not suitable for use as a reference on the NAR.Examples:667 $a Formerly on undifferentiated name record: nr 94007007667 $a MESSAGE: Being updated; treatment being changed to collected, not analyzed afterFeb. 2, 1992. [code and date]667 $a Old catalog heading: Jones, John Paul, d. 1792Another purpose is to give instructions on the subject usage of the heading. Certain types ofheadings, such as those established under AACR 24.20C, are not suitable for use as asubject entry. Geographic headings (151), however, are the main topic for these notes.Headings for city sections bear a 667 telling the cataloger that the heading is not suitable foruse as a geographic subdivision. Name authority records for older forms of place names beara 667 telling the cataloger of the correct form of heading to use in subject practice.Examples:667 $a SUBJECT USAGE: This heading is not valid for use as a geographic subdivision.667 $a SUBJECT USAGE: This heading is not valid for use as a subject. Works about thisplace are entered under Hong Kong (China).Catalogers have gradually changed the application of the 667 field over time. Records in thedatabase show any number of examples. A large number of these uses have been shifted tothe 670 or 675 fields. A past practice that should be used sparingly—if at all—is to reassureother catalogers that the new record is not a duplicate.64