046 Special Coded Dates

Field definition and scope:

Field 046 contains dates that are associated with the entity described in the record. These include:

For a person: a person's date of birth, date of death, and the date or date range of the person's period of activity.

For a corporate body: a date or range of dates on which a conference, etc., is held, or a date with which the corporate body is otherwise associated (e.g., date of establishment, date of termination, period of activity).

For a family: a significant date associated with the family.

For a work or expression: see subfield $k (Beginning or single date created).

The date and time are recorded according to Representations of Dates and Times (ISO 8601) in the pattern yyyy, yyyy-mm, or yyyymmdd (4 for the year, 2 for the month, and 2 for the day) unless subfield $2 (Source of date) specifies another date scheme.

The National level record requirement for this field is Optional.

Field 046 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 046	Special Coded Dates	O	R
Indicator:
First	Undefined; contains a blank	M
Second	Undefined; contains a blank	M

Subfield code:
$f	Birth date	O	NR
$g	Death date	O	NR
$k	Beginning or single date created	O	NR
$l	Ending date created	O	NR
$o	Single or starting date for aggregated content		NR
$p	Ending date for aggregated content		NR
$q	Establishment date		NR
$r	Termination date		NR
$s	Start period	O	NR
$t	End period	O	NR
$u	Uniform Resource Identifier	O	R
$v	Source of information	O	R
$x	Nonpublic note		R
$z	Public note		R
$2	Source of date scheme	A	NR
$3	Materials specified		NR
$6	Linkage	A	NR
$8	Field link and sequence number	O	R