Authority 053 forrásának megtekintése

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

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== First Indicator ==

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

	
== Second Indicator ==

:''Source of classification number''
:0 - Assigned by LC
:4 - Assigned by agency other than LC

	

== Subfield Codes ==

:$a - Classification number element-single number or beginning number of span (NR)
:$b - Classification number element-ending number of span (NR)
:$c - Explanatory term (NR)
:$5 - Institution to which field applies (R)
:$6 - Linkage (NR)
:$8 - Field link and sequence number (R)

== FIELD DEFINITION AND SCOPE ==

:Single LC classification number or a number span associated with a 1XX heading in an established heading record or a subdivision record. Source of the classification number is ''Library of Congress Classification'' and/or the ''LC Classification Additions and Changes'' that are maintained by the Library of Congress. The hyphen (-) between the two class numbers in a range of numbers may be generated based on the presence of both subfields $a and $b.

:Classification number(s) may be qualified by a descriptive term when the heading is represented in more than one place in the LC classification schedules. Each classification number or number span associated with a heading is contained in a separate 053 field.

:Organizations may conform to Library of Congress practice by applying ''Subject Cataloging Manual: Classification'' conventions.

== GUIDELINES FOR APPLYING CONTENT DESIGNATORS ==

:'''INDICATORS'''

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

:'''Second Indicator - Source of classification number'''
::Whether the source of the classification number is the Library of Congress or another organization.

:::'''0 - Assigned by LC'''

:::'''4 - Assigned by agency other than LC'''
::::MARC code for the organization is contained in subfield $5.
									
:::::'''053''' 	#4$aQH198.H3$5DI

:'''SUBFIELD CODES'''
::'''$a - Classification number element-single number or beginning number of span'''
									
::::100 	1#$aGrimes, Martha
::::'''053''' 	#0$aPS3557.R48998
									
::::130 	#0$aBook of Mormon$xAntiquities
::::'''053''' 	#0$aBX8627
									
::::180 	##$xRhetoric
::::'''053''' 	#0$aP301$cLinguistics

::'''$b - Classification number element-ending number of span'''
:::Ending number of number span when the beginning number of the span is contained in subfield $a.
									
::::151 	##$aUnited States$xHistory$yRevolution, 1775-1783
::::'''053''' 	#0$aE201$bE298

::'''$c - Explanatory term'''
:::Descriptive term or phrase that specifies the topic of the classification number. Normally, such a phrase is used to differentiate between two or more class numbers associated with the heading. The parentheses that enclose the phrase or term may be generated for display.
									
::::150 	##$aString quartets
::::'''053''' 	#0$aML1160$cHistory
::::'''053''' 	#0$aMT728$cInstruction and study
									
::::110 	2#$aCatholic Church$xHistory$vSources
::::'''053''' 	#0$aBX850$bBX875$cDocuments

::'''$5 - Institution to which field applies'''
:::See description of this subfield in Appendix A: [http://www.loc.gov/marc/authority/ecadcntf.html Control Subfields].
									
::::'''053''' 	#4$aHD1694.S6$5DI

::'''$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 ==

:'''Capitalization''' - Alphabetic characters in the classification number portion of the field are generally uppercase.
:'''Spacing''' - Any spaces that are desired as part of the call number must be input.
:'''Display Constants'''

::- 	''[hyphen associated with the content of subfield $b]''
::( ... ) 	''[parentheses associated with the content of subfield $c]''

:Hyphen between the two class numbers in a number span in subfields $a and $b and parentheses that may enclose the explanatory term in subfield $c are not carried in the MARC record. They may be system generated as display constants associated with the content of subfields $b and $c, respectively.
									
	
::::''Content designated field :''
:::'''053''' 	#0$aBX850$bBX875$cDocuments
	
::::''Display example:'' 
	
::::BX850-BX875 (Documents)

== CONTENT DESIGNATOR HISTORY ==

:''Indicator 2 - Source of Classification Number [NEW, 1995]''
:Prior to 1995, field 053 was an agency-assigned field and contained only classification numbers assigned by the Library of Congress.


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