DCM Z1:  645  Series Tracing Practice

LC series practice:  As of June 1, 2006, LC does not create or update SARs.

PCC series practice:  Transcription of the series statement is mandatory if applicable.  Searching for series authority records, tracing the series, and the creation and maintenance of series authority records are optional.

National-level PCC tracing decision:
for all newly-established SARs for series, multipart items, and other series (serial) = "trace."

See DCM Z1 64X section "PCC tracing practice" for guidelines about tracing when the SAR is already in the national authority file.

General policy for tracing practice

When reestablishing a series that was untraced prior to RDA, always give two 645 fields, using the RDA implementation date (regardless of the date of creating the SAR):

645  ##  $a t $d items cataloged after Mar. 30, 2013 $5 [code]

645  ##  $a n $d items cataloged before Mar. 31, 2013 $5 [code]

Even if only one/few volume(s) of a series or a serial other than a monographic series is analyzed, the 645 $a = t.

Recording national-level and PCC local tracing decisions

The national-level tracing practice, to be followed by those libraries creating PCC records, is separate from the local tracing practice at any PCC institution.  The national-level tracing decision always will be to trace.  The MARC 21 organization code used for this national-level decision in subfield $5 is "DPCC."  PCC participants should include the national-level and local decisions in SARs according to the following guidelines.

PCC participants:  new SAR

(1)  Always include the national-level decision to trace in any new SAR created for a monographic series, multipart item, or other series (serial) regardless of your local tracing decision.

645  ##  $a t $5 DPCC

(2)  Optionally, add your own local decision.

(a)  If your decision is to trace, add your MARC 21 organization code as the last subfield $5 in the one 645 field.

645  ##  $a t $5 DPCC $5 IRA

(b)  If your decision is not to trace, give two 645 fields with your decision in a second 645 field.

two fields in one SAR:

645  ##  $a t $5 DPCC

645  ##  $a n $5 WaU

PCC participants:  existing SAR

(1)  If the national-level decision is not in the SAR, do not add it.

(2)  Optionally, add your local tracing decision.  NOTE:  Only one PCC participant may include a local tracing practice in an SAR.

(a)  If your decision is to trace, add your MARC 21 organization code to an already-existing 645 field with decision to trace; if a 645 field is not present, add the field with your MARC 21 organization code in subfield $5.

645  ##  $a t $5 DPCC $5 WaU

645  ##  $a t $5 DPCC $5 DLC $5 CoDU

645  ##  $a t $5 DLC $5 CoDU

645  ##  $a t $5 IRA

[Examples represent single fields in different SARs; "DPCC" already in the first and second SARs.]

(b)  If your decision is not to trace, give your decision in a second 645 field if a 645 for a "traced" decision is present.  If a 645 field is not present, add the field with your MARC 21 identification code in subfield $5.

two fields in one SAR:

645  ##  $a t $5 DPCC

645  ##  $a n $5 IRA

single field in one SAR:

645  ##  $a n $5 WaU

For more information on DCM Z1 Instructions, select:

DCM Z1:  Introduction

DCM Z1