060 National Library of Medicine Call Number

Field definition and scope:

Field 060 contains either a complete National Library of Medicine (NLM) call number or classification number assigned either by the National Library of Medicine or by other agencies using the National Library of Medicine Classification. The second indicator values distinguish between content actually assigned by the National Library of Medicine and content assigned by an organization other than NLM.

Call numbers contained in this field and assigned by NLM may be either from the National Library of Medicine Classification schedules QS-QZ (preclinical sciences) and W-WZ (medicine and related subjects), or from the Library of Congress Classification schedules for subjects not covered in the NLM schedules, or an accession number. It is NLM practice to assign accession numbers to print monographs that receive limited cataloging, and since January 1994, to most print monographs receiving full-level cataloging.

The National level record requirement for this field is Optional.

Field 060 is repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, National-level (NLR) and Minimal-level (MLR) record requirements, and designator repeatability, see table below:

Position	Description	NLR	MLR	Repeatability
Field 060	National Library of Medicine Call Number	O	O	R
Indicator:
First	Existence in NLM collection	M
#	No information provided	A
0	Item is in NLM	A
1	Item is not in NLM	A

Second	Source of call number	M
0	Assigned by NLM	A
4	Assigned by agency other than NLM	A

Subfield code:
$a	Classification number	M	O	R
$b	Item number	A	O	NR
$0	Authority record control number or standard number	O	O	R
$1	Real World Object URI			R
$8	Field link and sequence number	O	O	R

Input conventions:

Punctuation

Spacing

Display constants

Content designator history:

Second Indicator - Series call number (SE) [obsolete]: In the serials specifications, the use of the second indicator position to indicate the type of series was made obsolete in 1976. The values were: 0 (No series involved), 1 (Main series), 2 (Subseries), and 3 (Sub-subseries).

Second Indicator - Source of call number

Value # - No information provided [obsolete]: The second indicator was defined in 1982. Prior to that change, 060 was an agency-assigned field and contained only call numbers assigned by the National Library of Medicine. NLM records created before the definition of this indicator may contain a # (blank) meaning undefined in the second indicator position.

Subfield $a - Classification number [repeatability change]: Prior to January 1994, subfield $a was repeated to record alternative call numbers. Beginning in 1994, alternative call numbers should be recorded in separate occurrences of field 060.

Subfield $0 - Authority record control number or standard number [new, 2017]

Subfield $1 - Real World Object URI [new, 2017]