046 - Special Coded Dates (R)
MARC 21 Community Information - Full
October 2002
First Indicator
Undefined
# - Undefined
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Second Indicator
Undefined
# - Undefined
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Subfield Codes
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$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)
$k - Beginning or single date created (NR)
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$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)
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FIELD DEFINITION AND SCOPE
Coded date information that is 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.
GUIDELINES FOR APPLYING CONTENT DESIGNATORS
■ INDICATORS
- Both indicator positions are undefined; each contains a blank (#).
■ SUBFIELD CODES
$f - Action date Date the record needs to be looked at again.
$g - Purge date Date the information should be removed from the system as it is no longer
relevant.
$h - Beginning date of event or program
$i - Ending date of event or program
$j - Date resource modified Date on which a resource has been modified. Dates in subfield $j
usually relate to Web pages and other electronic media that routinely contain the
date of last update.
$k - Beginning or single date created Beginning date of a date range on which a resource has been created, when it is
not more appropriately recorded in another field. Dates contained in subfield
$k may not be coded elsewhere in the formats.
$l - Ending date created Ending date of a date range on which a resource has been created.
$m - Beginning of date valid Beginning of the date span for the validity of a resource.
$n - End of date valid Ending of the date span for the validity of a resource.
$8 - Field link and sequence number
■ EXAMPLES
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| 046 |
##$f19931205
[The action date is December 5, 1993; no other dates are applicable to the
record in hand.] |
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| 046 |
##$f199312uu
[The action date is December 1993; no other dates are applicable to the record
in hand.] |
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| 046 |
##$g19931010$h19931006$i19931009
[The purge date is October 10, 1993; the beginning date of the event is October
6, 1993; the ending date of the event is October 9, 1993.] |
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| 046 |
##$f19930904
[The action date is September 4, 1993.] |
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| 046 |
##$m20011008$n20011027
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| 245 |
00$a[Title of train schedule] |
| 856 |
41$u[URL to train schedule]
[The train schedule is valid from October 8, 2001 - October 27, 2001] |
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| 046 |
##$j2001-07-12$2[Code for W3CDTF]
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| 245 |
00$aCounty business patterns, United States. |
| 856 |
41$uhttp://www.census.gov/prod/www/abs/cbptotal.html $zScroll down to "United States" and click on desired issue
[Note that W3C DTF is an alternative form specified in ISO 8601] |
INPUT CONVENTIONS
Length of date - When part of a date is unknown, missing digits are represented by the character
u.
CONTENT DESIGNATOR HISTORY
In 2002, field 046 was redefined as a repeatable field.
Field 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 separately delimited subfields eliminated the need
to encode more dates than were actually needed in the record.
$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]