Field definition and scope:

Field 548 contains a tracing for a chronological term see also from reference.  It is used in an established heading record or an established heading and subdivision record to trace a see also from reference from an established chronological term to a related established heading.

The National level record requirement for this field is Mandatory if applicable.

Field 548 is repeatable.

Guidelines for applying content designators:

The content designators identify the subelements occurring in chronological term headings constructed according to generally accepted thesaurus-building conventions (e.g., Faceted Application of Subject Terminology (FAST)).

Chronological terms include dates that are used as the lead element of subject or added entry access fields in bibliographic records.

A chronological term that is authorized for use only as a subject subdivision part of an extended subject heading is contained in a 182 (Chronological Subdivision) field.

For indicator and subfield code definitions and examples, National level (NLR) record requirements, and designator repeatability, see table below:

Position

Description

NLR

Repeatability

Field 548

See Also From Tracing - Chronological Term

A

R

Indicator:

 

 

 

First

Undefined; contains a blank

M

 

Second

Undefined; contains a blank

M

 

 

 

 

 

Subfield code:

 

 

 

$a

Chronological term

M

NR

$i

Relationship information

current - A

earlier   - A

R

$v

Form subdivision

A

R

$w

Control subfield

A

NR

 

/0  Special relationship

O

 

 

/1  Tracing use restriction

O

 

 

/2  Earlier form of heading

O

 

 

/3  Reference display

O

 

$x

General subdivision

A

R

$y

Chronological subdivision

A

R

$z

Geographic subdivision

A

R

$0

Authority record control number or standard number

A

R

$4

Relationship

O

R

$5

Institution to which field applies

A

R

$6

Linkage

A

NR

$8

Field link and sequence number

O

R

 

See:  Examples for this field.

Input conventions:

Punctuation

Spacing

Display constant for X48 fields

Display constants for cross references

Content designator history:

Subfield $i - Reference instruction phrase  [redefined, 2009]:  Subfield $i was renamed Relationship information and broadened to include relationship designations in addition to textual reference phrases.  The subfield was changed from Not repeatable (NR) to Repeatable (R).

Subfield $w/0 - Special relationship

Code r - Relationship information in subfield $i or $4  [new, 2009]

Subfield $w/1 - Tracing use restriction

Code h - No reference structures  [new, 2007]

Subfield $4 - Relationship code  [new, 2009]

Subfield $4 - Relationship code  [renamed, 2017] [redescribed, 2017]:  Subfield $4 was renamed to Relationship and redescribed to allow for the recording of relationship URIs in addition to MARC and non-MARC codes.

LC Guidelines:

  548  See Also From Tracing - Chronological Term

Tracings and References - 5XX Fields  [General Information]

Related MARC fields or documents:

X48  Chronological Terms - General Information

Tracings and References - General Information

RDA in MARC Authority Data

See also:

5XX  See Also From Tracings

Variable Data Fields