DCM Z1:  053  LC Classification Number

NACO practice:  NACO participants may use this field only in the following situation:  to record LC classification numbers associated with personal name headings for authors who have written works of the imagination, other than works for children.  They may input classification numbers found on completed bibliographic records created and input by LC; they may request verification of other classification numbers.

LC practice:  LC music team catalogers and PSD are adding 053 fields to NARs in the span ML410-429, individual biography covering individuals and performance groups.

LC catalogers are strongly encouraged to add 053 fields to NARs for authors who have written works of the imagination, other than works for children.  Follow section practice for when the field is added and who adds the field.  Add an LC authorized 053 field even if the number is identical to an unverified 053 field already in the NAR.

Verification of LC classification numbers for literary authors:

LC practice:  Literary author numbers must be assigned in a completed LC bibliographic record before being added to the authority record.  Completed bibliographic records may be identified by the MARC coding:

906  ##  $a 7 $b cbc

PCC practice:  Literary author numbers must be verified in one of two ways if they are being input as LC-established numbers.

1.   The LC-OPAC should be searched to discover whether the number has been assigned in a completed LC bibliographic record.  If so, the number is considered to be verified.  Completed bibliographic records may be identified by the MARC coding:

906  ##  $a 7 $b cbc

2.   If the number is not assigned in a completed bibliographic record, NACO participants should use the web form for 053 submissions available at URL http://www.loc.gov/aba/pcc/053/053prop.html.  LC's Cooperative Programs Section will then supply verification of LC classification numbers for literary authors.

If the literary author number is verified through one of these two mechanisms, the number should be input as an LC-verified number (i.e., 053 with second indicator of "0").

053  #0  $a PS3568.O243

Optionally, if the number is not verified through one of these two mechanisms, NACO participants may add an unverified 053 to the record, but it should be coded as a local number (i.e., 053 with second indicator of "4").

053  #4  $a [number] $5 [MARC institution code]

Use and order of 053 fields:

Do not add an 053 field to an NAR for an undifferentiated name (code "b" in 008/32).  When it is necessary to change a differentiated NAR that contains an 053 to an undifferentiated NAR, delete the 053.

Do not add an 053 field to an NAR for a literary author whose literary number is expressed by successive Cutter numbers such as those generated by Table P-PZ16.

If a verified 053 is already in the NAR, don't add an unverified 053.

Generally, only one verified 053 and one unverified 053 are permitted in an NAR.

Exception:  If an author writes in several languages, multiple verified and multiple unverified fields may be given; arrange the fields in class letter/number order and add the name of the language in subfield $c in each 053 field.

A single or multiple verified 053 field(s) should precede a single or multiple unverified 053 field(s).

For more information on DCM Z1 Instructions, select:

DCM Z1:  Introduction

DCM Z1