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




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14.1.4 Components of a linking entry field.


A link may contain a number of elements; the most commonly used elements are (RDA 24.4):




Authorized access point representing the related resource



Identifier(s) for the related resource



Relationship designators to indicate the specific nature of the relationship (RDA 29.1.5)



a. Authorized access point. The link must contain the authorized access point representing the related resource. The authorized access point is based on the 1XX/240/245 fields in the related record. The authorized access point may consist of a title proper, uniform title, corporate body and title, etc.8 The title given in subfield $t is the title proper ($a, $n, $p) or the authorized access point from field 130. Do not include other title information including parallel titles.
The related resource may have been described under AACR2 or earlier conventions. Generally use the form of entry and access points as found in the related bibliographic record for constructing the linking entry fields.
See Linking entry fields--General information in the CEG for specific details on determining the authorized access point and related subfield codes. Following are some examples of authorized access points in the linking entry fields.
Title proper


780

00

$t Advances in food research


Preferred title


785

00

$t Agriculture, forestry and fisheries (New York, N.Y.)


Authorized access point representing the expression (130/245)


767

0#

$t Fiziologiia rastenii. English. Plant physiology $x 0097-384X



Common title/section title


780

00

$t Review of fisheries in OECD countries. Country statistics $x 1992-836X


Corporate body/title proper


780

00

$a American School of Classical Studies at Athens. $t Ákoue

b. Identifier(s) for the related resource. Add the identifiers for the related resource (ISSN and control numbers; for instructions, see the CEG).


780

00

$t Advances in food research $x 0065-2628 $w (DLC) 48007808 $w (OCoLC)1461192


c. Relationship designator. Display constants in several of the linking entry fields, e.g., 780/785, 770/772 allow the system to convey the nature of the relationships between the related resources, e.g., “Continues” and “Continued by” and “Has supplement” and “Supplement to.” A linking entry field may optionally contain relationship designators intended to be displayed or printed preceding the other data in the field, instead of the display constant. 9 The relationship designators that replace the display constant are given in subfield $i of the linking entry field and the field’s second indicator value is “8" ("no display constant generated").


775

08

$i Digital transfer of (manifestation): $t International directory of little magazines & small presses (2011)



14.1.5 Reciprocal links. (RDA 17)


When there are records online for each title in a linking relationship, in most cases each record should contain a link (see below for exceptions). A link may be given when the related title is known though no record appears in the catalog. In some cases different tags are used for the reciprocal links (e.g., 780/785); in other cases the same tag is assigned in all related records (e.g., 775).


RECIPROCAL LINKING RELATIONSHIPS







765

Original language entry

767

Translation entry

770

Supplement/special issue entry

772

Parent record entry

773

Host item entry

774

Constituent unit entry

775

Other edition entry (used in all related records)

776

Additional physical form entry (used in all related records as necessary)

777

Issued with entry (used in all related records)

780

Preceding entry

785

Succeeding entry

786

Data source entry (not generally used in CONSER records)

787

Non-specific relationship entry (used on all related records)

Reciprocal linking is not always possible or desirable. If one title is related to many others, a link may be made one way but not the other (e.g., many titles merge into one: a link is given on each to the later title but not on the later title to all of the previous titles); a field 580 unstructured description of the relationship is generally given instead. Though possible, reciprocal links are not made in certain cases when cataloging reproduction microforms (see CEG 776).



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