76X-79X Linking Entry Fields - General Information

The table below contains the indicators and subfield codes used in the 76X-78X fields. Any field in the 79X range is locally defined.

The following topics are included in the General Information Section for the 76X-79X Linking Entry Fields:

Table (Indicators and Subfield codes)

Definitions of Terms (Terms used in Linking Entry fields)

Record Links and Notes (Record-linking technique in MARC)

Input Conventions (Guidance and clarification for application)

Content Designator History (A record of significant changes)

Guidelines for applying content designators:

As a general rule, each subfield defined for the linking entry fields corresponds to a field or field block that would be used to describe the related item in a separate record. A separate bibliographic record for the related item may or may not exist. For example, subfield $a (Main entry heading), corresponds to the 1XX (Main Entries) block; subfield $t (Title) corresponds to field 245 (Title Statement), and so on. The rules and practices applied to formulating the data in the linking entry fields are usually the same as would be followed for formulating the data about a related item in a separate bibliographic record except that the information provided need not be as complete. The fullness of the bibliographic information about the related item recorded in the linking entry fields should be based on the intended use of the links. When the related item is represented by a separate bibliographic record, recording only the basic bibliographic details (e.g., title, and relationship information) is usually sufficient.

For National-level (NLR) and Minimal-level (MLR) record requirements and repeatability, see applicable column. An asterisk ( * ) in the column indicates that the requirement varies. See table in the specific field.:

Position	Description	NLR	MLR	Repeatability
Fields 76X - 79X	Linking Entry Fields	*	*	R
Indicator:
First	Note controller	M
0	Display note	A
1	Do not display note	A

Second
760-777, 786-787	Display constant controller	M
#	< Field-related phrase >	A
0	Parent [772 only]	A
8	No display constant generated	A

780	Type of relationship	M
0	Continues	A
1	Continues in part	A
2	Supersedes	A
3	Supersedes in part	A
4	Formed by the union of ... and ...	A
5	Absorbed	A
6	Absorbed in part	A
7	Separated from	A

785	Type of relationship	M
0	Continued by	A
1	Continued in part by	A
2	Superseded by	A
3	Superseded in part by	A
4	Absorbed by	A
5	Absorbed in part by	A
6	Split into ... and ...	A
7	Merged with ... to form ...	A
8	Changed back to	A

Subfield code:
	Control subfields
$3	Materials specified [773 only]	O	O	NR
$4	Relationship	O	O	R
$6	Linkage	A	*	NR
$7	Control subfield	O	O	NR
	/0 - Type of main entry heading
	/1 - Form of name
.	/2 - Type of record
	/3 - Bibliographic level from Leader/07 of related record
$8	Field link and sequence number	O	O	R

	Descriptive information
$a	Main entry heading	A	*	NR
$b	Edition	A	*	NR
$c	Qualifying information [all except 773]	A	O	NR
$d	Place, publisher, and date of publication	O	O	NR
$g	Related parts	A	*	R
$h	Physical description	*	O	NR
$i	Relationship information	O	O	R
$j	Period of content [786 only]	O	O	NR
$k	Series data for related item [all except 760 and 762]	O	O	R
$m	Material-specific details	*	O	NR
$n	Note	*	O	R
$o	Other item identifier	O	O	R
$p	Abbreviated title [773 and 786 only]	O	O	NR
$q	Enumeration and first page [773 only]	O	O	NR
$s	Uniform title	A	*	NR
$t	Title	A	*	NR

	Numbers/codes
$e	Language code [775 only]	O	O	NR
$f	Country code [775 only]	O	O	NR
$r	Report number [all except 760 and 762]	*	*	R
$u	Standard Technical Report Number [all except 760 and 762]	*	*	NR
$v	Source contribution [786 only]	A	O	NR
$w	Record control number	A	O	R
$x	International Standard Serial Number	A	*	NR
$y	CODEN designation	O	O	NR
$z	International Standard Book Number [all except 760 and 762]	*	O	R