The information in this appendix was provided by the Policy and Standards Division, Library of Congress in December 2003.


When doing authority work, NACO libraries are asked to notify LC of any BFM stimulated by certain categories of authority work (see the guidelines at  Since the LC bibliographic records are not being observed directly in the catalog at LC but instead indirectly through other databases, it is necessary to provide guidance to NACO libraries on how to identify LC bibliographic records that are candidates for BFM.  These include both "current" records (LC bibliographic records that have been input/imported and issued by LC) and retrospective records (LC bibliographic records that have been input by libraries other than LC).  The phrase "LC cataloging" is used to refer to the following categories of cataloging:

1)   cataloging done by LC itself (original cataloging);

2)   cataloging done by LC that has been input by libraries other than LC;

3)   cataloging done by other agencies at the "LC level" and issued/distributed by LC (some done under the Program for Cooperative Cataloging; that done under the National Coordinated Cataloging Program; older cooperative cataloging; CONSER (certain levels of authentication));

4)   LC copy cataloging (LC use of cataloging done by other libraries).

The keys to identifying records that have either been added to RLIN21 files from LC distribution services or that have been input directly by LC staff are the relevant library identifiers.  In addition, for monographs, it is also necessary to take into account the values in the encoding level since LC "in process" records (encoding level = 5) are not candidates for BFM.  For serials, the key is in the codes in the 042 field and the code for language of cataloging in $b of field 040.


Records with RLIN21 Library Identifiers (LI) of DCLC, DCLP, DCLH, and DCLN are candidates for BFM except those with encoding level 5.


All records with an 042 field are candidates for BFM except

1)   those containing solely an "x" code in 042 (e.g., "xlc");

2)   those with 040 $b = fre.

See also:

Section III:  Appendices