642 Series Numbering Example (Authority)

642 Series Numbering Example (R) (Variable Data Field)

Field definition and scope:

Field 642 contains the series numbering example that is to be followed in the sequential designation portion of a series added entry tracing in bibliographic records for individual issues of the series named in the 1XX field of an established heading record for a series . When the form of the numbering varies within a series, field 642 is repeated to provide series numbering examples for the different ranges of volumes/dates. Different series numbering examples for different organizations and/or different copies or sets within the same organization are also contained in separate 642 fields.

Field 642 is used only when a numbered series (008/13, Numbered or unnumbered series , code a or c ) is to be traced in bibliographic records (645, Series Tracing Practice , subfield $a , code t).

Irregularities in series numbering are contained in field 641 (Series Numbering Peculiarities) .

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

Field 642 is repeatable .

Guidelines for applying content designators:

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

Position	Description	NLR	Repeatability
Field 642	Series Numbering Example	A	R
Indicator:
First	Undefined; contains a blank	M
Second	Undefined; contains a blank	M

Subfield code:
$a	Series numbering example	M	NR
$d	Volumes/dates to which series numbering example applies	current - O earlier - M	NR
$5	Institution/copy to which field applies	M	R
$6	Linkage	A	NR
$8	Field link and sequence number	O	R