Ccm module 14. Linking relationships (Fields 765-787, 580)




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14.1.6. When to use a structured description using relationship designators and/or an unstructured description of the relationship.

Relationship designators generated from the display constant defined for a field or second indicator value (e.g., Continues:, Supplement to:) may not adequately express the relationship. MARC 21 provides two mechanisms for providing explicit descriptions of the relationship:




  • Linking entry fields (other than 780 and 785) can generate relationship designators using display text in $i instead of the display constant when the field indicators are “08” (“generate a note, no display constant generated”).




  • An unstructured description can be given in field 580 in addition to linking entry fields, which are necessary to provide database links.10 Field 580 is also used in certain situations when a linking entry cannot be given.

Relationship designators generated from linking entry fields with display text in subfield $i can be used in lieu of 530 and 580 fields in many instances.11 The PCC Policy Committee’s Relationship Designators in Bibliographic Records guideline 14 states: “If a cataloger wishes to indicate a known relationship to a known resource, and the $i relationship information subfield is defined for the MARC 7XX field being used, provide a relationship designator.” CONSER participants prefer use of this technique whenever possible. Typical usage includes the following examples:




  • A relationship designator, such as Cumulates: or Companion to:, cannot be generated using the display constant for a field tag or second indicator, especially in field 787.




787

08

$i Companion to: $t Phonefiche $w ...


  • A relationship designator includes information in addition to that generated by the display constant.




770

08

$i Has supplement (work): $a Gennadius Library. $t Gennadeion news


775

08

$i Also issued in an English edition: $t Cuba economic news




776

08

776 08 $i Print version: $t Applied science & technology monthly

Unstructured descriptions of the relationship in field 580, in addition to or instead of linking entry fields, are appropriate in the following situations:




  1. A chronological relationship involves multiple titles. For CONSER records, field 580 is most commonly used when a chronological relationship involves more than one title, requiring multiple linking entry fields, such as Merged with:... to form: ... . Many systems’ display or print programs cannot generate a single note from multiple linking fields and field 580 must be used for the note. First indicators in fields 780/785 may be set to display the data in the 780/785 fields in order to allow the system to provide a link in conjunction with the detailed note about the nature of the relationship to the related resources.12




245

00

$a American office dealer magazine.

580

##

$a Merger of: Southern office, and: Western office dealer.

780

04

$t Southern office $x 0584-455X

780

04

$t Western office dealer $x 0744-1924


  1. The description of the relationship that would be generated from the link is not sufficient. This includes the following situations:




  • Field 580 is used for reprint notes when the note contains additional information such as the publisher, frequency, etc.




580

##

$a Originally published biweekly (later weekly): Quito : publisher not identified.



  • A 580 field may be used when the serial has the same relationship to several titles, each of which is recorded in a separate linking field. Unlike the situation in a. above, use of field 580 in this situation is optional.




580

##

$a Supplement to: AIMM bulletin and proceedings, -1985; AusIMM bulletin and proceedings, 1986-1989; AusIMM bulletin, 1990-










772

08

$i Supplement to: $t AIMM bulletin and proceedings

772

08

$i Supplement to: $t AusIMM bulletin and proceedings

772

08

$i Supplement to: $a AusIMM bulletin



  • When related serials have the same relationship and are too numerous to link separately, a 580 field provides a means for recording the nature of the relationship. Prior to 2006, when related serials had the same relationship and were too numerous to link separately, a single linking entry field was used to provide the data for the related serials. CONSER makes this practice optional (See guidelines in CEG Linking Entry Fields–General Information, Special Instructions–Numerous related records.). The recording of multiple record control numbers in one linking field doesn't provide a machine link to the other resources and there are currently now no limits on the number of fields that can be added to an OCLC record.

Option, single linking entry field:




580

##

$a Split into numerous issues, each giving votes for Democratic or Republican governmental offices, with title: State of main primary election tabulations for the election of … official vote for …










785

16

$t State of Maine primary election tabulations for the election of

... official vote for ... $w (DLC) 92658566 $w (DLC) 92658568 $w (DLC) 92658569 $w (DLC) 92658570 $w (DLC) 92658571 $w (DLC) 92658572 $w (DLC) 92658573 $w (DLC) 92658574 $w (DLC) 92658575 $w (DLC) 92658576 $w (DLC) 92658577 $w (DLC) 92658578 $w (DLC) 92658511 $w (DLC) 92658515



Option, multiple linking entry fields:




580

##

$a Split into numerous issues, each giving votes for Democratic or Republican governmental offices, with title: State of main primary election tabulations for the election of … official vote for …










785

06

$t State of Maine primary election tabulations for the election of ... official vote for ... $w (DLC) 92658566

785

06

$t State of Maine primary election tabulations for the election of ... official vote for ... $w (DLC) 92658568







etc.

A 580 field may be required to explain a change in carrier or mode of issuance (RDA

2.13.1.3; RDA/LC-PCC PS 1.6.2.2; RDA 3.1.6.1) if the titles are the same and the

relationship designator generated from the link would be ambiguous.




580

##

$a No longer published in print after 2010; continued online only.










776

08

$i Online version: $t Parent’s Guide to Federal Student Aid $w ...



  1. Referring to another publication that is not given in a linking entry field. Such situations include:




  • A translation for which the original title is unknown.




580

##

$a Also issued in a concise Thai English edition, 1983; and in an unabridged Thai edition, <1984, 1986>



  • Related publications that are too numerous to be separately named.




580

##

$a Continues and consolidates the reports issued under the same title for each state.

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