Question 12 on the FAQ about LC Classification numbers in BIBCO records
answers this question. This FAQ is also linked on the NACO
web page: http://www.loc.gov/catdir/pcc/bibco/classfaq.html
The response to question 12 states that:
"To indicate that the number is a verified LCC, NACO participants
are asked to code the second indicator "0".
Second indicator "blank" is an obsolete value and is not to be used
in newly created 053s. In authorities the second indicator in 053
was not defined until 1995, and not implemented by LC and the utilities
until 1998-99. Second indicator value "blank" is
synonymous to value "0" (cf. MARC 21 format, 053, p. 3 footnote)
and will be found on older records."
The 053 form on the Web will be changed to also include
information on what indicator to use, thank you for bringing this
to our attention.
Sophia McMillen wrote:
> Dear PCC,
> What 2nd indicator value should we use when we are supplying an 053 field for
> literary authors in new NARs? The MARC21 Authority Format gives two valid
> codes: 0 (=Assigned by LC), or 4 (Assigned by agency other than LC; The MARC
> code for the organization is contained in subfield $5). When we use the
> Library of Congress Literary Author (053) Request Form at the NACO website to
> suggest a classification, there is no mention of indicator values.
> We note that RLIN accepts the value of blank in 2nd indicator position of 053
> and there are many records in LCNA with this value. Should we always use 2nd
> indicator code 0 (zero) when LC approves our proposed classification? Why is
> 2nd indicator value of blank apparently valid? When should we leave the 2nd
> indicator blank, or should we?
> Sophia McMillen [log in to unmask]
> University of Hawaii at Manoa Library
> 2550 The Mall, Honolulu, HI 96822
> (808) 956-2753 (voice mail)| fax: 956-5968