MARC 046 Special Coded Dates (Authority): Difference between revisions

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MARC field 046 in the authority format contains information about dates that are associated with the entity described in the record.  
MARC field 046 in the [[List of MARC 21 fields for authority data | Authority]] format contains information about dates that are associated with the entity described in the record.  


==Commonly-used tags==
==Commonly-used tags==
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  ǂg - Death date
  ǂg - Death date
  ǂk - Beginning or single date created
  ǂk - Beginning or single date created
  ǂl - Ending date created  
  ǂl - Ending date created
  ǂs - Start period
  ǂs - Start period
  ǂt - End period
  ǂt - End period
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  ǂv - Source of information
  ǂv - Source of information
  ǂ2 - Source of date scheme
  ǂ2 - Source of date scheme
Note:  new subfields ǂq (Establishment date) and ǂr  (Termination date) added to MARC in April 2015 are not yet (August 2015) to be used, per DCM Z1. Continue to use ǂs (Start period) and  ǂt (End period) according to their old definitions, which included establishment/termination date of a corporate body.


==Policy and formulation==
==Policy and formulation==
*Create an 046 for every new and updated NAR
*Include readily-available date information in this field, even if that information is not used in the authorized access point.  
*Include readily-available date information in this field, even if that information is not used in the authorized access point.  
*Firm (even if vague) dates do not need a ǂ2; it is assumed that the source is ISO 8601 (the international standard for dates and times).  
*Use the Extended Date/Time Format (ǂ2 edtf) in all cases except for centuries (per PCC Best practice)
*Uncertain dates are formulated according to the Extended Date/Time Format developed by the Library of Congress, and require <code>ǂ2 edtf</code>
*For centuries, follow ISO 8601 and use the first two digits of the year, e.g. "19" for "20th century".  Omit the ǂ2 (an unspecified source is assumed to be ISO 8601)
*In the absence of birth or death dates, record years of activity, if known. Do this even when an authorized access point is modified by an active century date. If years of activity are unknown, record the century in field 046
*046 subfields do not have to be parallel; record each element with as much information as you have for that element
*If not absolutely confident/as compromise, put specific activity dates in 046 and "active Xth century" in 100 ‡d
*Generally do not edit an existing date range if a work is found outside those dates (e.g. 1620 work found for Printer, active 1607-1616)


==Examples==
==Examples==
  046  ǂs 1705 ǂt 1721  
046  ǂf 1490 ǂg 1556 ǂ2 edtf
1001 Sauffer, Gervas, ǂd 1490-1556
 
046  ǂf 1820 ǂg 1886-05-30 ǂ2 edtf
1001 Dobrza<small>ń</small>ski, Jan, ǂd 1820-1886
 
  046  ǂs 1705 ǂt 1721 ǂ2 edtf
  1001 Speed, Anne, ǂd active 18th century
  1001 Speed, Anne, ǂd active 18th century


046  ǂs 18 ǂt 19
1001 Stuart, Otho, ǂd active 19th century-20th century
046  ǂf [1615,1616] ǂg 1685 ǂ2 edtf
1001 Clifford, Anthony, ǂd 1615 or 1616-1685


==External links==
==External links==
*[http://www.loc.gov/marc/authority/ad046.html MARC field 046 (Authority)]
*[http://www.loc.gov/marc/authority/ad046.html MARC field 046 (Authority)]
*[http://desktop.loc.gov/search?view=document&id=InfobaseMaauth00046&fq=allresources|true  MARC field 046 (Authority) in Cataloger's Desktop] (Access limited by licensing agreements)
*[http://desktop.loc.gov/search?view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=dcmz1046&hash=046# 046 Special Coded Dates in DC Z1 in Cataloger's Desktop] (Access limited by licensing agreements)
*[https://en.wikipedia.org/wiki/ISO_8601 ISO 8601]
*[https://en.wikipedia.org/wiki/ISO_8601 ISO 8601]
*[http://www.loc.gov/standards/datetime/ Extended Date/Time Format (EDTF)]
*[http://www.loc.gov/standards/datetime/ Extended Date/Time Format (EDTF)]


[[Category:Description]]
 
[[Category:Cataloging]]
[[Category:Cataloging]]
[[Category:Staff policies and procedures]]
[[Category:Staff policies and procedures]]
[[Category:MARC]]

Latest revision as of 14:51, 14 March 2016

MARC field 046 in the Authority format contains information about dates that are associated with the entity described in the record.

Commonly-used tags

Indicators 

Undefined

Subfields 

ǂf - Birth date
ǂg - Death date
ǂk - Beginning or single date created
ǂl - Ending date created
ǂs - Start period
ǂt - End period
ǂu - Uniform Resource Identifier
ǂv - Source of information
ǂ2 - Source of date scheme

Note: new subfields ǂq (Establishment date) and ǂr (Termination date) added to MARC in April 2015 are not yet (August 2015) to be used, per DCM Z1. Continue to use ǂs (Start period) and ǂt (End period) according to their old definitions, which included establishment/termination date of a corporate body.

Policy and formulation

  • Create an 046 for every new and updated NAR
  • Include readily-available date information in this field, even if that information is not used in the authorized access point.
  • Use the Extended Date/Time Format (ǂ2 edtf) in all cases except for centuries (per PCC Best practice)
  • For centuries, follow ISO 8601 and use the first two digits of the year, e.g. "19" for "20th century". Omit the ǂ2 (an unspecified source is assumed to be ISO 8601)
  • In the absence of birth or death dates, record years of activity, if known. Do this even when an authorized access point is modified by an active century date. If years of activity are unknown, record the century in field 046
  • 046 subfields do not have to be parallel; record each element with as much information as you have for that element
  • If not absolutely confident/as compromise, put specific activity dates in 046 and "active Xth century" in 100 ‡d
  • Generally do not edit an existing date range if a work is found outside those dates (e.g. 1620 work found for Printer, active 1607-1616)

Examples

046  ǂf 1490 ǂg 1556 ǂ2 edtf
1001 Sauffer, Gervas, ǂd 1490-1556 

046  ǂf 1820 ǂg 1886-05-30 ǂ2 edtf
1001 Dobrzański, Jan, ǂd 1820-1886

046  ǂs 1705 ǂt 1721 ǂ2 edtf
1001 Speed, Anne, ǂd active 18th century

046  ǂs 18 ǂt 19
1001 Stuart, Otho, ǂd active 19th century-20th century

046  ǂf [1615,1616] ǂg 1685 ǂ2 edtf
1001 Clifford, Anthony, ǂd 1615 or 1616-1685

External links