640 Series Dates of Publication and/or Sequential Designation

Field definition and scope:

Field 640 contains the beginning/ending date(s) of publication and/or the sequential designations used on items in a series named in the 1XX field of an established heading record for a series. It may also contain a citation for the source of the information. The information may be recorded in either a formatted or an unformatted style.

The sequential designation information in this field is not an example of the form of series numbering that may be used in a bibliographic record; that information is contained in field 642 (Series Numbering Example).

Report year coverage and numbering peculiarities information is contained in field 641 (Series Numbering Peculiarities).

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

Field 640 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 640	Series Dates of Publication and/or Sequential Designation	A	R
Indicator:
First	Note format style	M
0	Formatted style	A
1	Unformatted style	A

Second	Undefined; contains a blank	M

Subfield code:
$a	Dates of publication and/or sequential designation	M	NR
$z	Source of information	A	NR
$6	Linkage	A	NR
$8	Field link and sequence number	O	R

Input conventions:

Punctuation

Spacing

Display constant

LC Guidelines:

640 Series Dates of Publication and/or Sequential Designation

DCM Z1 Instructions:

640 Series Dates of Publication and/or Sequential Designation

64X Series Treatment