DCM Z1:  046  Special Coded Dates


Best practice:  When encoding date information, give the fullest information about the date that is readily available.  (The date in an 046 may be more precise than a date used in the 100 subfield $d.)  When revising existing authority records, record dates in 046 even if the heading itself does not have dates in 100 subfield $d, when the information is readily available.

When recording dates in field 046, use the Extended Date Time Format (EDTF) schema in all cases except for centuries; supply dates using the pattern yyyy, yyyy-mm, yyyy-mm-dd.  See date table in LC-PCC PS


046  ##  $f 1884-10-11 $g 1962-11-07 $2 edtf

100  1#  $a Roosevelt, Eleanor, $d 1884-1962

670  ##  $a When you grow up to vote, 1932: $b t.p. (Eleanor Roosevelt (Mrs. Franklin D. Roosevelt))

670  ##  $a Wikipedia, viewed on July 21, 2010 $b (Eleanor Roosevelt; Anna Eleanor Roosevelt; born Oct. 11, 1884 in New York City in Manhattan; died Nov. 7, 1962)

046  ##  $s -0199~ $2 edtf

100  0#  $a Hellanicus $c (Grammarian), $d active approximately 200 B.C.

670  ##  $a Brill's new Pauly, viewed on Aug. 2, 2011 $b (Hellanicus; Alexandrian grammarian; ca. 200 BC)

046  ##  $f 1946-06 $2 edtf

100  1#  $a Vickers, Roy Henry, $d 1946-

670  ##  $a Solstice, c1988: $b t.p. (Roy Henry Vickers) jkt. (native Indian artist; b. June, 1946, Greenville, British Columbia)

046  ##  $k 1981 $2 edtf

100  1#  $a Allende, Isabel. $t Casa de los espiritus

670  ##  $a Cox, Karen Castellucci. Isabel Allende, 2003: $b p. 4-5 (in 1981 Allende began writing a fictionalized version of stories she had heard growing up, which was published in Spain in 1982)

When recording a century in the 046 field, use the first two digits of the hundred year span (e.g., use "16" to represent the 17th century, 1600-1699).


046  ##  $s 17

100  1#  $a Turner, Elizabeth, $d active 18th century

670  ##  $a Cohen, A.I. Int'l encycl. of women composers, 2nd ed. $b Turner, Elizabeth, 18th cent. English composer)

Note that the 1st century A.D. is represented by value "00" and B.C. centuries have a hyphen-minus before the digits (e.g., "-04" for the 5th century B.C.).  An approximate century (e.g., active approximately 12th century) cannot be recorded in the 046 field.

Subfield $2 - Source of date scheme:

Always use subfield $2 edtf except after a century.

Subfields $q - Establishment date, $r - Termination date, $s - Start period, and $t - End period

Until further notice do not use subfield $q or $r.  Continue to use subfield $s and subfield $t for start and end periods for corporate bodies.

For instructions on using $s and $t for start and end periods in fields 368, 370, 371, 372, 373, 374, 375, and 376, see the instructions provided in the 373 field.

Subfield $u - Uniform Resource Identifier and Subfield $v - Source of information:

The following represents PCC practice on recording sources of information in $u and $v in fields where they are defined, and/or in field 670:

1.   670s must be provided to support information used as part of an access point in 1XX and 4XX.  (Cf. 670 section of the yellow pages for more information.)

2.   For 046, 37X, 381:

a.   Use of $v is optional if the same information/source is already cited in the 670.

b.   Use $v if the information/source is not cited in a 670.

c.   Use of $u is optional, and should always be preceded by $v.

Subfield $v - Source of information:

Follow the same basic citation principles when recording data in subfield $v (Source of information) of fields 046, 37X and 381 that currently apply to field 670 subfield $a (Source citation).

Supply specific citation information (page number, sub-page of website) in subfield $v if, in the cataloger's judgment, this greater specificity is needed to find the information within the source cited.

If the information in 046, 37X, 381 is in the same form as found in the source, there is no need to cite usage information.  If the information recorded in 046, 37X, 381 is in a different form from that in the source, use 670 $b (Information found).

For tangible sources:

If the information was derived from a tangible source (e.g., a print book, removable digital media) subfield $v should contain sufficient information for a cataloger to find the item cited in a catalog or bibliographic database.  This can usually be limited to title proper and imprint or date.  If that combination is not unique, the title citation may be preceded by the preferred access point form of the creator's name.

For online resources:

Provide information sufficient to find the resource via a search engine.  Include either title and publication date (if it is a formally-published resource, such as an e-book) or a suitable description of the document and date accessed (for a less formal resource).  Optionally include subfield $u.


100  1#  $a Lazzarini, Sérgio G.

372  ##  $a Industrial relations $2 lcsh $v Lazzarini, Sergio G.  CV-English, viewed Feb. 22, 2012 $u http://www.sergiolazzarini.insper.edu.br/indexelazza.html

670  ##  $a Capitalismo de laçeos, 2011: $b t.p. (Sérgio G. Lazzarini)

Subfield $u and $v not defined:

Subfields $u and $v are not defined for use in these fields:  377, 380, 382, 383, 384, 385, and 386.  Provide a 670 if needed to justify information recorded in one of those fields.

For more information on DCM Z1 Instructions, select:

DCM Z1:  Introduction