RUL Guidelines for Using 050 _4

Library of Congress call numbers assigned by libraries other than LC itself have second indicator "4" to distinguish these numbers from LC-assigned call numbers. In 1995, RLG issued guidelines for the appropriate use of the 050 _4. We will continue to follow those guidelines strictly (see RLG Guidelines for Using 050 _4). In addition, the following are local guidelines for implementing 050 _4 that are not included in the RLG documentation.

Exclusions: Only call numbers using Library of Congress classification should be entered in the 050 _4. Therefore, RUL should not enter an 050 _4 for categories of materials that do not get LC call numbers, such as:

• Newspapers
• Microfilms which receive an accession-type number
• AV materials
• U.S. documents classed in SuDocs
• Rutgers theses
• Percival Wilde collection (ALEX)

In addition, the RLG guidelines specify that the call number in 050 _4 should conform to LC practice. Therefore, the following types of call number are not appropriate for using the 050 _4, and the call number should be entered in the CALL or LCAL field of the holdings record, as has been the practice until now:

• Any non-LC call number
• Special subject cutters not found in LC schedules
• Non-Z call numbers for bibliographies
• Call numbers on records with numbered series [our series treatment does not always or necessarily follow LC's treatment decisions]
• Call numbers assigned at RUL for New Jersey public hearings in DOCNJ sublocations
• Call numbers assigned through retrospective conversion
• Call numbers assigned for "recats"
• Literary author classification numbers that do not appear in the LC schedules

Workflow and Recommendations: It is recommended that:

• 050 _4 be used for all newly cataloged records (new receipts) according to the guidelines distributed by RLG and outlined in this documentation.
• Original catalogers begin adding the 050 _4 tag to the records to which they assign call numbers
• All non-LC assigned call numbers be verified and entered in 050 _4
• All cataloging staff is made aware that 050 _4 is a locally (member) assigned LC-type call number and therefore records with 050 _4 do not meet the criteria for contact or copy cataloging

Implementation: The use of 050 _4 at RUL will begin on October 16, 1995.

Version 1.1
Prepared by Lida Sak and Rhonda Marker, September 26, 1995.

Updated by Melissa De Fino, May 28, 2009