Identification of PCC-Associated Records, Post March 3, 1996

revised August 20, 2001

NOTES ABOUT VARIOUS ASPECTS OF THE TABLES:

1. Content designation is in USMARC notation except, for clarity, each subfield is preceded and followed by a space; # = blank, $ = delimiter.
2. In the examples of 040 fields, the appropriate subfield $d for the condition being illustrated is shown immediately following subfield $c. In some cases, particularly for records in OCLC, there could actually be intervening $d subfields. In the internal OCLC record the symbols in 040 are in the OCLC form; upon export, they are translated into the MARC Code List for Organizations form (except when using Z39.50, in which case they remain in the OCLC form).
3. Some rows show "OLD:" and "NEW:" practices; these illustrate changes applicable to cataloging source and 040 based on the general principle that LC cataloging source and LC 040 $a and $c subfields containing "DLC" are no longer changed at the time of upgrade of an LC IBC record. Note that the OCLC system changes 040 $c from DLC to TRL when such records are loaded to OCLC from a local system.
4. When the 042 column shows multiple codes, they are carried in the record in repeated $a subfields in a single 042 field (e.g., $a lcode $a pcc).
5. Changing encoding level to blank and changing 042 in the OCLC system requires National Level Enhance.
6. In 1997 008/39 (Cataloging source) value "blank" was redefined from "Library of Congress" to "National bibliographic agency." NLM switched to using blank at the beginning of 2000. The guidelines for identifying PCC records and those issued by the Library of Congress are now as follows:
   1. records created by PCC libraries:
      008/39 (Cataloging source) is either "c" or "blank" (blank is used by any national bibliographic agency, e.g., the National Library of Medicine); 042 is "pcc";
   2. full level original cataloging records created by LC:
      no explicit PCC identification (008/39 = blank; no 042);
   3. core level original cataloging records created by LC:
      no explicit PCC identification; 008/39 = blank; 042 = pcc (Ldr/17 (Encoding level) = 8 for records in a CIP state and changed to 4 upon completing the cataloging with item in hand); use of pcc in 042 is not to identify a PCC record per se but to identify unambiguously records that are core level or are intended to be core level (when in a CIP state).
7. Since the 008/39 value for any national bibliographic agency is now blank, that should be the value used in any PCC-related record as follows:
   1. any new record created by a national bibliographic agency that is also a PCC member;
   2. any already existing record originally created by a national bibliographic agency, whether a PCC member or not, that is now upgraded to a PCC record (042 = pcc) by a PCC library.