Authority 052 forrásának megtekintése

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

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== First Indicator ==

:''Code source''
:'#' - Library of Congress Classification
:1 - U.S. Dept. of Defense Classification
:7 - Source specified in subfield $2

	
== Second Indicator ==

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

	

== Subfield Codes ==

:$a - Geographic classification area code (NR)
:$b - Geographic classification subarea code (R)
:$d - Populated place name (R)
:$2 - Code source (NR)
:$6 - Linkage (NR)
:$8 - Field link and sequence number (R)

== FIELD DEFINITION AND SCOPE ==

:Classification code for a geographic area associated with the 151 field in an established heading record or 181 field in a subdivision record for a geographic name.

:This code can provide more precise geographic access than the codes contained in [http://www.loc.gov/marc/authority/ad043.html field 043] (Geographic Area Code). Each main geographic area code and any related subarea codes associated with the heading are contained in a separate 052 field.

== GUIDELINES FOR APPLYING CONTENT DESIGNATORS ==

:'''INDICATORS'''

:'''First Indicator - Code source'''
::Source of the code in subfield $a and information in the other subfields.

:::'#' - '''Library of Congress Classification'''
::::Code is derived from the ''Library of Congress Classification-Class G'' and expanded Cutter number lists for place names. Cutter numbers for place names in the United States are also published in ''Geographic Cutters''. The Library of Congress maintains the ''Library of Congress Classification, Geographic Cutters'', and the Cutter number lists.

:::'''1 - U.S. Dept. of Defense Classification'''

:::'''7 - Source specified in subfield $2'''
::::Classification number is taken from a classification system other than that specified by one of the other defined indicator values and for which an identifying source code is given in subfield $2.

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

:'''SUBFIELD CODES'''

::'''$a - Geographic classification area code'''
:::Four- to six-character numeric or alphanumeric code for the main geographic area associated with the heading.
:::If the first indicator position contains value #, the code contains a four to six-character numeric code that consists of the appropriate classification number from the range G3190-G9980 derived from the ''Library of Congress Classification-Class G'' by dropping the letter G. If the first indicator contains value 7, a code from another list is used and that list is specified in subfield $2.
:::Code is derived from the LC class G schedule by dropping the letter G.
									
::::151 	##$aMexico$xEconomic conditions$y1970-
::::'''052''' 	##$a4411

::'''$b - Geographic classification subarea code'''
:::Alphanumeric code, assigned from expanded Cutter number lists, that represents a subarea of the geographic area coded in subfield $a. Cutter numbers for places in the U.S. are published in Geographic Cutters.
:::If the first indicator position contains value #, the code is derived from the Library of Congress-Class G or the expanded Cutter number lists for place names. The subfield may also contain a geopolitical subarea code from FIPS 10-4, or another code list as specified in subfield $2. Each geographic subarea code is contained in a separate subfield $b. Subfield $b may be repeated for subareas falling within a main area with the same code.
									
::::151 	##$aRichmond (Tex.)$vMaps
::::'''052''' 	##$a4034$bR4$bR8
									
::::181 	##$zTexas$zRichmond
::::'''052''' 	##$a4034$bR4$bR8

::'''$d - Populated place name'''
:::Approved form of name for a populated place. May contain the name of the geographic area.
:::In the case of a name established by the U.S. Board on Geographic Names, if a short form of the name has been approved, that form is used in preference to the full form of name.
									
::::151 	##$aMostar (Bosnia and Hercegovina)
::::'''052''' 	1#$aBK$dMostar

::'''$2 - Code source'''
:::MARC code for the source of the geographic classification. Code from: [http://www.loc.gov/standards/sourcelist/classification.html Classification Scheme Source Codes].

::'''$6 - Linkage'''
:::See description of this subfield in Appendix A: [http://www.loc.gov/marc/authority/ecadcntf.html Control Subfields].

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

== INPUT CONVENTIONS ==

:'''Punctuation''' - Period that usually precedes a Cutter number is omitted in subfield $b. Field 052 does not end with a period.
:'''Capitalization''' - Alphabetic characters are recorded in uppercase.

== CONTENT DESIGNATOR HISTORY ==

Indicator 1 - Code source
In 2000, the first indicator was given its present definition. Records created prior to this change may contain a code # meaning undefined.0 - U.S. Dept. of Defense Classification [OBSOLETE, 2002]
First indicator value 0 (U.S. Dept. of Defense Classification) was made obsolete. Value 1 was defined as U.S. Dept. of Defense Classification to replace it.


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