046 Special Coded Dates

Field definition and scope:

Field 046 contains coded date information. These dates are potentially useful for retrieval and data management purposes. If none of these types of dates is applicable to the record in hand, the field is not used.

Field 046 is repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, and designator repeatability, see table below:

Position	Description	Repeatability
Field 046	Special Coded Dates	R
Indicator:
First	Undefined; contains a blank
Second	Undefined; contains a blank

Subfield code:
$f	Action date	NR
$g	Purge date	NR
$h	Beginning date of event or program	NR
$i	Ending date of event or program	NR
$j	Date resource modified	NR
$k	Beginning or single date created	NR
$l	Ending date created	NR
$m	Beginning of date valid	NR
$n	End of date valid	NR
$2	Source of date	NR
$6	Linkage	NR
$8	Field link and sequence number	R

See: Examples for this field.

Input conventions:

When part of a date is unknown, missing digits are represented by the character u.

Content designator history:

004 Coded Dates Fixed Field [obsolete, 1998]: Due to a conflict with a differently defined field 004 in the MARC 21 Format for Holdings Data, field 004 was made obsolete in favor of four special subfields in field 046, defined in 1998. Subfield $f (Action date) was defined for information originally coded in 004/00-07. Subfield $g (Purge date) was defined for information originally coded in 004/08-15. Subfield $h (Beginning date of event or program) was defined for information originally coded in 004/16-23. Subfield $i (Ending date of event or program) was defined for information originally coded in 004/24-31. The restructuring of the field 004 positionally defined elements into separate delimited subfields eliminated the need to encode more dates than were actually needed in the record.

Subfields $j - Date resource modified [new, 2002]

$k - Beginning or single date created [new, 2002]

$l - Ending date created [new, 2002]

$m - Beginning of date valid [new, 2002]

$n - End of date valid [new, 2002]

$2 - Source of date [new, 2002]

$6 - Linkage [new, 2002]

In 2002, field 046 was redefined as a repeatable field.