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[[File:Issn barcode.png|thumb|ISSN encoded in an EAN-13 barcode with sequence variant 0 and issue number 5.]]
This is a preview for the new '''MathML rendering mode''' (with SVG fallback), which is availble in production for registered users.
[[File:Issn-barcode-explained.png|thumb|Example of an ISSN encoded in an EAN-13 barcode with explanation.]]
[[File:ISSN with addon EAN13.svg|thumb|ISSN expanded with sequence variant 0 to a [[Global Trade Item Number|GTIN-13]] and encoded in an [[EAN-13]] barcode with and [[EAN 2|EAN-2]] add-on designating issue number 13.]]


An '''International Standard Serial Number''' ('''ISSN''') is a unique eight-digit number used to identify a [[periodical publication]] at a specific [[Media (communication)|media type]].<ref name=Whatis>{{Citation | url = http://www.issn.org/2-22635-What-is-an-ISSN.php | title = What is an ISSN? | publisher = ISSN International Center}}.</ref> It is internationally accepted as a fundamental identifier for distinguishing between identical serial titles and facilitating checking and ordering procedures, collection management, legal deposit, interlibrary loans etc.<ref>http://www.bl.uk/bibliographic/issn.html</ref>
If you would like use the '''MathML''' rendering mode, you need a wikipedia user account that can be registered here [[https://en.wikipedia.org/wiki/Special:UserLogin/signup]]
* Only registered users will be able to execute this rendering mode.
* Note: you need not enter a email address (nor any other private information). Please do not use a password that you use elsewhere.


When a periodical is published, with same [[Content (media)|content]], in two or more different [[Media (communication)|media]], a different ISSN is assigned to each media type &mdash; in particular the [[Print media|print]] and  [[Electronic media|electronic]] media types, named '''print ISSN''' ('''p-ISSN''') and '''electronic ISSN''' ('''e-ISSN''' or '''eISSN''').
Registered users will be able to choose between the following three rendering modes:


The ISSN system was first drafted as an ISO [[international standard]] in 1971 and published as ISO 3297 in 1975.<ref>{{Citation | publisher = ISSN International Center | year = 2008 | url = http://www.issn.org/2-22643-ISSN-and-ISO-standards.php | title = ISSN and ISO standards}}.</ref> The ISO subcommittee [[TC 46/SC 9]] is responsible for the standard.
'''MathML'''
To assign a [[unique identifier]] to [[indecs Content Model|the serial as content]] (linking among the different media), '''ISSN-L''' must be used, as difined by ''ISO 3297:2007''.
:<math forcemathmode="mathml">E=mc^2</math>


==Code format==
<!--'''PNG'''  (currently default in production)
The format of the ISSN is an eight digit number, divided by a hyphen into two four-digit numbers.<ref name=Whatis/> The last digit, which may be 0-9 or an X, is a [[check digit]]. The general form of the ISSN code can be expressed by a [[Perl Compatible Regular Expressions|PCRE]] [[regular expression]],
:<math forcemathmode="png">E=mc^2</math>


  \d{4}-\d{3}[\dX]
'''source'''
:<math forcemathmode="source">E=mc^2</math> -->


The ISSN of the journal ''Hearing Research'', for example, is 0378-5955, the check digit is 5. 
<span style="color: red">Follow this [https://en.wikipedia.org/wiki/Special:Preferences#mw-prefsection-rendering link] to change your Math rendering settings.</span> You can also add a [https://en.wikipedia.org/wiki/Special:Preferences#mw-prefsection-rendering-skin Custom CSS] to force the MathML/SVG rendering or select different font families. See [https://www.mediawiki.org/wiki/Extension:Math#CSS_for_the_MathML_with_SVG_fallback_mode these examples].
To calculate the check digit, the following algorithm may be used:
:Calculate the sum of the first seven digits of the ISSN multiplied by its position in the number, counting from the right&mdash;that is, 8, 7, 6, 5, 4, 3, and 2, respectively:
::<math>0\cdot 8 + 3\cdot 7 + 7\cdot 6 + 8\cdot 5 + 5\cdot 4 + 9\cdot 3 + 5\cdot 2</math>
::<math>= 0 + 21 + 42 + 40 + 20 + 27 + 10</math>
::<math>= 160</math>.
:The [[modulo operation|modulus]] 11 of this sum is then calculated: divide the sum by 11 and determine the remainder.
::<math>\frac{160}{11} = 14\mbox{ remainder }6=14+\frac{6}{11}</math>.


:If there is no remainder the check digit is 0, otherwise the remainder value is subtracted from 11 to give the check digit:
==Demos==
::<math>11 - 6 = 5</math>
::5 is the check digit.


:An upper case X in the check digit position indicates a check digit of 10 (so it is like a [[Roman numerals|roman ten]]).
Here are some [https://commons.wikimedia.org/w/index.php?title=Special:ListFiles/Frederic.wang demos]:


To confirm the check digit, calculate the sum of all eight digits of the ISSN multiplied by its position in the number, counting from the right (if the check digit is X, then add 10 to the sum). The modulus 11 of the sum must be 0.


Also, there is an Online ISSN checker can check validity of ISSN base on above algorithm.<ref>http://journal-index.org/ISSN-validator/</ref>
* accessibility:
** Safari + VoiceOver: [https://commons.wikimedia.org/wiki/File:VoiceOver-Mac-Safari.ogv video only], [[File:Voiceover-mathml-example-1.wav|thumb|Voiceover-mathml-example-1]], [[File:Voiceover-mathml-example-2.wav|thumb|Voiceover-mathml-example-2]], [[File:Voiceover-mathml-example-3.wav|thumb|Voiceover-mathml-example-3]], [[File:Voiceover-mathml-example-4.wav|thumb|Voiceover-mathml-example-4]], [[File:Voiceover-mathml-example-5.wav|thumb|Voiceover-mathml-example-5]], [[File:Voiceover-mathml-example-6.wav|thumb|Voiceover-mathml-example-6]], [[File:Voiceover-mathml-example-7.wav|thumb|Voiceover-mathml-example-7]]
** [https://commons.wikimedia.org/wiki/File:MathPlayer-Audio-Windows7-InternetExplorer.ogg Internet Explorer + MathPlayer (audio)]
** [https://commons.wikimedia.org/wiki/File:MathPlayer-SynchronizedHighlighting-WIndows7-InternetExplorer.png Internet Explorer + MathPlayer (synchronized highlighting)]
** [https://commons.wikimedia.org/wiki/File:MathPlayer-Braille-Windows7-InternetExplorer.png Internet Explorer + MathPlayer (braille)]
** NVDA+MathPlayer: [[File:Nvda-mathml-example-1.wav|thumb|Nvda-mathml-example-1]], [[File:Nvda-mathml-example-2.wav|thumb|Nvda-mathml-example-2]], [[File:Nvda-mathml-example-3.wav|thumb|Nvda-mathml-example-3]], [[File:Nvda-mathml-example-4.wav|thumb|Nvda-mathml-example-4]], [[File:Nvda-mathml-example-5.wav|thumb|Nvda-mathml-example-5]], [[File:Nvda-mathml-example-6.wav|thumb|Nvda-mathml-example-6]], [[File:Nvda-mathml-example-7.wav|thumb|Nvda-mathml-example-7]].
** Orca: There is ongoing work, but no support at all at the moment [[File:Orca-mathml-example-1.wav|thumb|Orca-mathml-example-1]], [[File:Orca-mathml-example-2.wav|thumb|Orca-mathml-example-2]], [[File:Orca-mathml-example-3.wav|thumb|Orca-mathml-example-3]], [[File:Orca-mathml-example-4.wav|thumb|Orca-mathml-example-4]], [[File:Orca-mathml-example-5.wav|thumb|Orca-mathml-example-5]], [[File:Orca-mathml-example-6.wav|thumb|Orca-mathml-example-6]], [[File:Orca-mathml-example-7.wav|thumb|Orca-mathml-example-7]].
** From our testing, ChromeVox and JAWS are not able to read the formulas generated by the MathML mode.


==Code assignment==
==Test pages ==
ISSN codes are assigned by a network of ISSN National Centres, usually located at [[national library|national libraries]] and coordinated by the ISSN International Centre based in [[Paris]]. The International Centre is an [[International organization|intergovernmental organization]] created in 1974 through an agreement between [[UNESCO]] and the French government. The International Centre maintains a database of all ISSNs assigned worldwide, the ''ISDS Register (International Serials Data System)'' otherwise known as the ''ISSN Register''. {{As of|2011}}, the ISSN Register contained records for 1,623,566 items.<ref>{{cite web|title=Total number of records in the ISSN register |url = http://www.issn.org/files/issn/statistiques/Total-number-of-records.pdf |accessdate=9 September 2012 | format =PDF|year= 2012}}</ref>


==Comparison with other identifiers==
To test the '''MathML''', '''PNG''', and '''source''' rendering modes, please go to one of the following test pages:
ISSN and [[International Standard Book Number|ISBN]] codes are similar in concept, where ISBNs are assigned to individual [[book]]s. An ISBN might be assigned for particular issues of a periodical, in addition to the ISSN code for the periodical as a whole. An ISSN, unlike the ISBN code, is an anonymous identifier associated with a periodical title, containing no [[information]] as to the [[publisher]] or its [[location (geography)|location]]. For this reason a new ISSN is assigned to a periodical each time it undergoes a major title change.
*[[Displaystyle]]
*[[MathAxisAlignment]]
*[[Styling]]
*[[Linebreaking]]
*[[Unique Ids]]
*[[Help:Formula]]


Since the ISSN applies to an entire periodical a new identifier, the [[Serial Item and Contribution Identifier]], was built on top of it to allow references to specific volumes, articles, or other identifiable components (like the [[table of contents]]).
*[[Inputtypes|Inputtypes (private Wikis only)]]
 
*[[Url2Image|Url2Image (private Wikis only)]]
=== Media ''vs'' Content  ===
==Bug reporting==
Separate ISSN are needed for serials in different media (with the exception of reproduction [[microform]]s).
If you find any bugs, please report them at [https://bugzilla.wikimedia.org/enter_bug.cgi?product=MediaWiki%20extensions&component=Math&version=master&short_desc=Math-preview%20rendering%20problem Bugzilla], or write an email to math_bugs (at) ckurs (dot) de .
Thus the [[Print media|print]] and  [[Electronic media|electronic]] media versions of a serial need separate ISSN.<ref>http://www.loc.gov/issn/e-serials.html</ref>
Also, a [[CD-ROM]] version and a [[World Wide Web|web]] version of a serial require different ISSN since two different media are involved. However, the same ISSN can be used for different file formats (ex. [[PDF]] and [[HTML]]) of the same online serial.
 
This "media-oriented identification" of serials make sense in the 1970's. In the 1990's, with the [[Personal computer|PC]]s, good screens, and [[the Web]], what make sense is to consider only ''content'', independent of media. "Content-oriented identification" of serial's contents, arrives with the [[indecs Content Model]] and its application the [[Digital Object Identifier]] (DOI).
 
ISSN not updated, but later, in 2007, ISSN-L was defined in the new ISSN standard (ISO 3297:2007) as an “ISSN designated by the ISSN Network to enable collocation or versions of a continuing resource linking among the different media”.<ref name="issnL">http://www.issn.org/understanding-the-issn/assignment-rules/the-issn-l-for-publications-on-multiple-media/</ref>
 
==Availability==
The ISSN Register is not freely available for interrogation on the web but is available by subscription. There are several routes to the identification and verification of ISSN codes for the general public.
* the print version of a periodical typically will include the ISSN code as part of the publication information
* most periodical websites contain ISSN code information
* derivative lists of publications will often contain ISSN codes; these can be found through on-line searches with the ISSN code itself or periodical title
* [[WorldCat]] permits searching their catalog by ISSN by entering "issn:"+ISSN code in the query field. One can also go directly to an ISSN's record by appending it to <nowiki>http://www.worldcat.org/ISSN/</nowiki>, e.g. http://www.worldcat.org/ISSN/1021-9749. This does not query the ISSN Register itself but rather shows whether any Worldcat library holds an item with the given ISSN.
<!-- Though an [http://www.issn.org:8080/English/pub/faqs/issn/issnchecking ISSN checking facility] (dead link) is available, this is a tool for checking the validity of an ISSN number format, not for querying the ISSN Register to determine what periodical the input number is associated with. -->
 
==Use in URNs==
An ISSN can be encoded as a [[Uniform Resource Name]] (URN) by prefixing it with "urn:ISSN:".<ref>[http://tools.ietf.org/html/rfc3044 Using The ISSN (International Serial Standard Number) as URN (Uniform Resource Names) within an ISSN-URN Namespace]—RFC 3044</ref> For example [[Rail (magazine)|''Rail'']] could be referred to as "urn:ISSN:1534-0481". URN namespaces are case-sensitive, and the ISSN namespace is all caps.<ref>[http://dublincore.org/architecturewiki/ResourceIdentifierGuidelines#head-a2100b457f3211cf98e960a3a481007893c4e68a Dublin Core: ResourceIdentifierGuidelines: 4.5 ISSN]</ref> If the checksum digit is "X" then it is always encoded in uppercase in a URN.
 
=== Problems ===
The util URNs are [[#Media vs Content|content-oriented]], but ISSN is media-oriented:
 
* '''ISSN is not unique''' when the concept is "journal is a set of contents, generally copyrighted content": the same journal (same contents and same  copyrighs) have 2 or more ISSN codes. A URN need to point to "unique content" (a "unique journal" as a "set of contents" reference). <br/>Examples: [[Nature (journal)|Nature]] have an ISSN for print, 0028-0836, and another for the same content at Web, 1476-4687; only the oldest (0028-0836) is used as [[unique identifier]]. As ISSN is not unique, NLM need to createm, prior to 2007, the [http://www.nlm.nih.gov/bsd/mms/medlineelements.html#jid JID].
 
* '''ISSN''' not offer resolution mechanisms, as [[Digital Object Identifier]] (DOI), so, the DOI is used as URN for articles, with (by historical reasons) no need of ISSN existence.
 
An unique URN  for serials simplifies the search, recovery and delivery of data for various services including, in particular, [[Information retrieval|search systems]] and [[Knowledge base|knowledge databases]].<ref name="issnL"/> '''ISSN-L''' was created to fill this gap.
== ISSN variants ==
=== print ISSN ===
The "default" ISSN. ISSN for [[print media]] (paper) version of the periodic.
 
=== electronic ISSN ===
ISSN for [[electronic media]] (online) version of the periodic.
 
=== linking ISSN ===
A unique [[unique identifier]], for all media-versions of the (same [[Content (media)|content]]) periodic.
 
==References==
{{Reflist}}
 
==External links==
* [https://docs.google.com/spreadsheet/ccc?key=0AusE0e8tdNZVdDFHRnVEZmNCQ3NSNGxNamxDMk44a1E List of 63800 ISSN numbers and titles]
* {{Citation | url = http://www.issn.org/ | title = ISSN International Centre}}
* {{Citation | publisher = ISSN International Centre | url = http://www.issn.org/files/issn/Documentation/Manuels/ISSN-MANUAL_JAN09.pdf | title = ISSN Manual | chapter = Cataloging Part | format = PDF}}.
* {{Citation | place = United States | publisher = [[Library of Congress]] | url = http://www.loc.gov/issn/issnbro.html | title = How U.S. publishers can obtain an ISSN}}.
* {{Citation | publisher = [[Library and Archives Canada]] | url = http://www.lac-bac.gc.ca/isn/041011-2010-e.html | title = ISSN in Canada}}.
* {{Citation | publisher = [[British Library]] | url = http://www.bl.uk/bibliographic/issn.html | title = Getting an ISSN in the UK}}.
* {{Citation | publisher = [[Bibliothèque nationale de France]] | url = http://www.bnf.fr/fr/professionnels/s_informer_obtenir_issn/s.obtenir_issn.html?first_Art=non | title = Getting an ISSN in France | language = French}}
* {{Citation | publisher = [[Deutsche Nationalbibliothek]] | url = http://www.dnb.de/DE/Wir/Kooperation/ISSN/issnFAQ.html | title = Getting an ISSN in Germany | language = German}}
 
{{Audiovisual works|state=uncollapsed}}
{{ISO standards}}
 
[[Category:Checksum algorithms]]
[[Category:ISO standards]]
[[Category:Serial numbers]]
[[Category:Universal identifiers]]
[[Category:Library science]]

Latest revision as of 23:52, 15 September 2019

This is a preview for the new MathML rendering mode (with SVG fallback), which is availble in production for registered users.

If you would like use the MathML rendering mode, you need a wikipedia user account that can be registered here [[1]]

  • Only registered users will be able to execute this rendering mode.
  • Note: you need not enter a email address (nor any other private information). Please do not use a password that you use elsewhere.

Registered users will be able to choose between the following three rendering modes:

MathML


Follow this link to change your Math rendering settings. You can also add a Custom CSS to force the MathML/SVG rendering or select different font families. See these examples.

Demos

Here are some demos:


Test pages

To test the MathML, PNG, and source rendering modes, please go to one of the following test pages:

Bug reporting

If you find any bugs, please report them at Bugzilla, or write an email to math_bugs (at) ckurs (dot) de .

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