Authority 022 szerkesztése

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

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==First Indicator ==

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

== Second Indicator ==

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

==Subfield Codes ==

:$a - International Standard Serial Number (NR)
:$l - ISSN-L (NR)
:$m - Canceled ISSN-L (R)
:$y - Incorrect ISSN (R)
:$z - Canceled ISSN (R)
:$6 - Linkage (NR)
:$8 - Field link and sequence number (R)


== FIELD DEFINITION AND SCOPE ==


:International Standard Serial Number (ISSN) and/or any incorrect and canceled ISSNs copied from field 022 of a MARC 21 bibliographic record for a continuing resource.

:The inclusion of this field in the established heading record for a series which identifies an occasionally-analyzed issue of a continuing resource provides a machine link within a system between the authority record for the series and a bibliographic record in which the heading is used as a series added entry. The subfields for this field are defined for consistency with field 022 in the [http://www.loc.gov/marc/bibliographic/ecbdhome.html MARC 21 Format for Bibliographic Data].

:International Standard Book Number (ISBN) associated with a multipart item that is cataloged as a set is contained in field 020 (International Standard Book Number).


== GUIDELINES FOR APPLYING CONTENT DESIGNATORS ==

:'''INDICATORS'''

::Both indicator positions are undefined; each contains a blank (#).

:'''SUBFIELD CODES'''

::'''$a - International Standard Serial Number'''
:::Valid ISSN for the continuing resource. ISSN may be generated for display.
									
::::'''022''' 	##$a0083-0674

::'''$l - ISSN-L'''
:::ISSN that links together various media versions of a continuing resource. ISSN-L may be generated for display.
									
::::'''022''' 	##$a1234-1231$l1234-1231

::'''$m - Canceled ISSN-L'''
:::Canceled ISSN-L that has been associated with the resource. Each canceled ISSN-L is contained in a separate subfield $m.
:::I''SSN-L (canceled)'' may be generated for display.
									
::::'''022''' 	##$a1560-1560$l1234-1231$m1560-1560

::'''$y - Incorrect ISSN'''
:::Incorrect ISSN that has been associated with the continuing resource. Each incorrect ISSN is contained in a separate subfield $y. A canceled ISSN is contained in subfield $z.
:::''ISSN (incorrect)'' may be generated for display.
									
::::'''022''' 	##$a0046-225X$y0046-2254

::'''$z - Canceled ISSN'''
:::Canceled ISSN that is associated with the continuing resource. Each canceled ISSN is contained in a separate subfield $z.
:::''ISSN (canceled)'' may be generated for display.
									
::::'''022''' 	##$a0410-7543$z0527-740X

::'''$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 ==

:'''ISSN Structure''' - ISSN is an agency-assigned data element. ISSNs are assigned to continuing resource publications by national centers under the auspices of the ISSN Network. An ISSN consists of eight digits comprising two groups of four digits each, separated by a hyphen. The eighth digit is a check digit used as a computer validity check; it consists of a number between 0 and 9 or an uppercase X (for the arabic numeral 10). A description of the ISSN structure and the procedure for validation of the ISSN by calculating the check digit is in ''International Standard Serial Numbering (ISSN)'' (ISO 3297).

:'''Display Constants'''

::{|
|width='150px'|ISSN 	
|''[associated with the content of subfield $a]''
|-
|ISSN-L
|''[associated with the content of subfield $l]''
|-
|ISSN-L (canceled)
|''[associated with the content of subfield $m]''
|-
|ISSN (incorrect)
|''[associated with the content of subfield $y]''
|-
|ISSN (canceled)
|''[associated with the content of subfield $z]''
|}


:ISSN usually appears on an item with the prefix ISSN and as two groups of four digits separated by a hyphen. The hyphen separating the two groups of digits is carried in the MARC record. The initialisms ''ISSN'' and ''ISSN-L'' and the phrases ''ISSN-L (canceled)'', ''ISSN (incorrect)'' and ''ISSN (canceled)'' are not input. They may be system generated as display constants associated with the content of subfields $a, $l, $m, $y, and $z, respectively.
									
	
:::''Content designated field:''
::'''022''' 	##$a0046-225X$y0046-2254
	
:::''Display example:'' 
	
:::ISSN 0046-225X ISSN (incorrect) 0046-2254

== CONTENT DESIGNATOR HISTORY==

:''$l - ISSN-L [NEW, 2007]
:$m - Canceled ISSN-L [NEW, 2007]'' 


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