Authority 016 szerkesztése

<p align="right">[[Kezdőlap]] - [[A MARC21 authority formátum]] - [[Authority 01X-09X]]</p>

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== First Indicator ==

:''National bibliographic agency''
:'#' - Library and Archives Canada
:7 - Source specified in subfield $2

==Second Indicator ==

:''Undefined''
:'#' - Undefined

	

== Subfield Codes ==

:$a - Record control number (NR)
:$z - Canceled or invalid record control number (R)
:$2 - Source (NR)
:$8 - Field link and sequence number (R)


== FIELD DEFINITION AND SCOPE ==


:Unique numbers that have been assigned to a record by a national bibliographic agency other than the Library of Congress (Library of Congress control numbers are recorded in [http://www.loc.gov/marc/authority/ad010.html field 010]).

:The control number may also appear in field 001 (Control Number) in records distributed by the same national agency. An organization using a national bibliographic agency record may move the national bibliographic agency control number from field 001 to field 016 and use field 001 for its own system control number.

:May contain field 016 with a canceled or invalid control number of a previously-distributed record. A record may be canceled because it is a duplicate record for the same heading.


== GUIDELINES FOR APPLYING CONTENT DESIGNATORS ==

:'''INDICATORS'''

:'''First Indicator - National bibliographic agency'''
::Value that either identifies a specific national bibliographic agency as the source of the control number, or refers to a code in subfield $2 (Source).

:::'#' - '''Library and Archives Canada'''
::::Library and Archives Canada (LAC) is the source of the national bibliographic agency control number.
									
:::::'''016''' 	##$a0010C0008##

:::'''7 - Source specified in subfield $2'''
::::Source of the control number is indicated by a code in subfield $2.

:'''Second Indicator - Undefined'''
::Contains a blank (#).

:'''SUBFIELD CODES'''
::'''$a - Record control number'''
:::Valid record control number assigned by a national bibliographic agency.
									
::::'''016''' 	##$a0115E5000F#

::'''$z - Canceled or invalid record control number'''
:::Canceled or invalid record control number assigned by a national bibliographic agency.

::'''$2 - Source'''
:::MARC code or the name of the organization that identifies the national bibliographic agency that was the source of the record control number. Code from: [http://www.loc.gov/marc/organizations/orgshome.html MARC Code List for Organizations].
:::Used only when the second indicator position contains value 7 (Source specified in subfield $2).

::'''$8 - Field link and sequence number'''
:::See description of this subfield in Appendix A: [http://www.loc.gov/marc/authority/ecadcntf.html Control Subfields].


== STRUCTURE OF THE LAC CONTROL NUMBER ==


:With the redefinition of field 016 in 1997, any national bibliographic agency can record its control number in this field. Although the structure of numbers would vary from agency to agency, extensive use of field 016 has been made by Library and Archives Canada. Their control number structure is given below.

:Language code (character position 9) identifies with a code “E” (English) or “F” (French), a bilingual heading for which two separate authority records, one in English, the other in French, are produced.

:LAC control number is carried in fields 016 (subfield $a) and 001 (Control Number) in records distributed by LAC’s MARC Records Distribution Service.

:'''Control Number Structure'''

:{|
|width='150px'|''Name of Element''
|width='150px'|''Number of characters''
|''Name of Element''
|-
|Number
|4
|00-03
|-
|Check digit
|1
|04
|-
|Number
|4
|05-08
|-
|Language code
|1
|09
|-
|Blank
|1
|10
|-
|Revision indicator
|variable
|11-n
|}


<p align="right">[[Kezdőlap]] - [[A MARC21 authority formátum]] - [[Authority 01X-09X]]</p>