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International Standard Serial Number

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International Standard Serial Number
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an ISSN, 2049-3630, as represented by an EAN-13 bar code.
AcronymISSN
OrganisationISSN International Centre
Introduced1976; 47 years ago (1976)
No. issued> 2,500,000
No. of digits8
Check digitWeighted sum
Example2049-3630
Websitewww.issn.org
ISSN encoded in an EAN-13 barcode with sequence variant 0 and issue number 05
ISSN encoded in an EAN-13 barcode with sequence variant 0 and issue number 05
Example of an ISSN encoded in an EAN-13 barcode, with explanation.
Example of an ISSN encoded in an EAN-13 barcode, with explanation.
ISSN expanded with sequence variant 0 to a GTIN-13 and encoded in an EAN-13 barcode with an EAN-2 add-on designating issue number 13
ISSN expanded with sequence variant 0 to a GTIN-13 and encoded in an EAN-13 barcode with an EAN-2 add-on designating issue number 13

An International Standard Serial Number (ISSN) is an eight-digit serial number used to uniquely identify a serial publication, such as a magazine.[1] The ISSN is especially helpful in distinguishing between serials with the same title. ISSNs are used in ordering, cataloging, interlibrary loans, and other practices in connection with serial literature.[2]

The ISSN system was first drafted as an International Organization for Standardization (ISO) international standard in 1971 and published as ISO 3297 in 1975.[3] ISO subcommittee TC 46/SC 9 is responsible for maintaining the standard.

When a serial with the same content is published in more than one media type, a different ISSN is assigned to each media type. For example, many serials are published both in print and electronic media. The ISSN system refers to these types as print ISSN (p-ISSN) and electronic ISSN (e-ISSN).[4] Consequently, as defined in ISO 3297:2007, every serial in the ISSN system is also assigned a linking ISSN (ISSN-L), typically the same as the ISSN assigned to the serial in its first published medium, which links together all ISSNs assigned to the serial in every medium.[5]

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Serial number

Serial number

A serial number is a unique identifier assigned incrementally or sequentially to an item, to uniquely identify it.

Unique identifier

Unique identifier

A unique identifier (UID) is an identifier that is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. The concept was formalized early in the development of computer science and information systems. In general, it was associated with an atomic data type.

Serial (publishing)

Serial (publishing)

In publishing and library and information science, the term serial is applied to materials "in any medium issued under the same title in a succession of discrete parts, usually numbered and appearing at regular or irregular intervals with no predetermined conclusion."

International Organization for Standardization

International Organization for Standardization

The International Organization for Standardization is an international standard development organization composed of representatives from the national standards organizations of member countries. Membership requirements are given in Article 3 of the ISO Statutes.

International standard

International standard

An international standard is a technical standard developed by one or more international standards organizations. International standards are available for consideration and use worldwide. The most prominent such organization is the International Organization for Standardization (ISO). Other prominent international standards organizations including the International Telecommunication Union (ITU) and the International Electrotechnical Commission (IEC). Together, these three organizations have formed the World Standards Cooperation alliance.

Content (media)

Content (media)

Content is the information contained within communication media. This includes internet, cinema, television, radio, audio CDs, books, magazines, physical art, and live event content. It’s directed at an end-user or audience in the sectors of publishing, art, and communication. Live events include speeches, conferences, and stage performances. Content within media focuses on the attention and how receptive the audience is to the content. Circulation brings the content to everyone and helps spread it to reach large audiences. It is a process in which anyone who encounters any type of content will go through a cycle where they encounter the content, interpret it, and will continue to share it with other people.

Media (communication)

Media (communication)

In mass communication, media are the communication outlets or tools used to store and deliver information or data. The term refers to components of the mass media communications industry, such as print media, publishing, the news media, photography, cinema, broadcasting, digital media, and advertising.

Printing

Printing

Printing is a process for mass reproducing text and images using a master form or template. The earliest non-paper products involving printing include cylinder seals and objects such as the Cyrus Cylinder and the Cylinders of Nabonidus. The earliest known form of printing as applied to paper was woodblock printing, which appeared in China before 220 AD for cloth printing. However, it would not be applied to paper until the seventh century. Later developments in printing technology include the movable type invented by Bi Sheng around 1040 AD and the printing press invented by Johannes Gutenberg in the 15th century. The technology of printing played a key role in the development of the Renaissance and the Scientific Revolution and laid the material basis for the modern knowledge-based economy and the spread of learning to the masses.

Electronic media

Electronic media

Electronic media are media that use electronics or electromechanical means for the audience to access the content. This is in contrast to static media, which today are most often created digitally, but do not require electronics to be accessed by the end user in the printed form. The primary electronic media sources familiar to the general public are video recordings, audio recordings, multimedia presentations, slide presentations, CD-ROM and online content. Most new media are in the form of digital media. However, electronic media may be in either analogue electronics data or digital electronic data format.

Code format

The format of the ISSN is an eight-digit code, divided by a hyphen into two four-digit numbers.[1] As an integer number, it can be represented by the first seven digits.[6] The last code digit, which may be 0-9 or an X, is a check digit. Formally, the general form of the ISSN code (also named "ISSN structure" or "ISSN syntax") can be expressed as follows:[7]

NNNN-NNNC

where N is in the set {0,1,2,...,9}, a digit character, and C is in {0,1,2,...,9,X}; or by a Perl Compatible Regular Expressions (PCRE) regular expression:[8]

^[0-9]{4}-[0-9]{3}[0-9xX]$.

For example, the ISSN of the journal Hearing Research, is 0378-5955, where the final 5 is the check digit, that is C=5. To calculate the check digit, the following algorithm may be used:

The sum of the first seven digits of the ISSN is calculated and multiplied by its position in the number, counting from the right, that is, 8, 7, 6, 5, 4, 3, and 2, respectively:

The modulus 11 of this sum is then calculated; the remainder is determined after dividing the sum by 11:

If there is no remainder the check digit is 0, otherwise the remainder value is subtracted from 11 to give the check digit:

5 is the check digit, C. For calculations, an upper case X in the check digit position indicates a check digit of 10 (like a Roman ten).

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. There is an online ISSN checker that can validate an ISSN, based on the above algorithm.[9]

In EANs

ISSNs can be encoded in EAN-13 bar codes with a 977 "country code" (compare the 978 country code ("bookland") for ISBNs), followed by the 7 main digits of the ISSN (the check digit is not included), followed by 2 publisher-defined digits, followed by the EAN check digit (which need not match the ISSN check digit).[10]

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Check digit

Check digit

A check digit is a form of redundancy check used for error detection on identification numbers, such as bank account numbers, which are used in an application where they will at least sometimes be input manually. It is analogous to a binary parity bit used to check for errors in computer-generated data. It consists of one or more digits computed by an algorithm from the other digits in the sequence input.

Perl Compatible Regular Expressions

Perl Compatible Regular Expressions

Perl Compatible Regular Expressions (PCRE) is a library written in C, which implements a regular expression engine, inspired by the capabilities of the Perl programming language. Philip Hazel started writing PCRE in summer 1997. PCRE's syntax is much more powerful and flexible than either of the POSIX regular expression flavors and than that of many other regular-expression libraries.

Regular expression

Regular expression

A regular expression is a sequence of characters that specifies a match pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation. Regular expression techniques are developed in theoretical computer science and formal language theory.

Hearing Research

Hearing Research

The Hearing Research is a peer-reviewed monthly journal that publishes research work with basic peripheral and central auditory mechanisms.

Roman numerals

Roman numerals

Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers are written with combinations of letters from the Latin alphabet, each letter with a fixed integer value. Modern style uses only these seven:

Bookland

Bookland

"Bookland" is the informal name for the Unique Country Code (UCC) prefix allocated in the 1980s for European Article Number (EAN) identifiers of published books, regardless of country of origin, so that the EAN namespace can catalogue books by ISBN rather than maintaining a redundant parallel numbering system. In other words, Bookland is a fictitious country that exists solely in EAN for the purposes of non-geographically cataloguing books in the otherwise geographically keyed EAN coding system.

ISBN

ISBN

The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. Publishers purchase or receive ISBNs from an affiliate of the International ISBN Agency.

Code assignment, maintenance and look-up

ISSN codes are assigned by a network of ISSN National Centres, usually located at national libraries and coordinated by the ISSN International Centre based in Paris. The International Centre is an intergovernmental organization created in 1974 through an agreement between UNESCO and the French government.

Linking ISSN

ISSN-L is a unique identifier for all versions of the serial containing the same content across different media. As defined by ISO 3297:2007, the "linking ISSN (ISSN-L)" provides a mechanism for collocation or linking among the different media versions of the same continuing resource. The ISSN-L is one of a serial's existing ISSNs, so does not change the use or assignment of "ordinary" ISSNs;[11] it is based on the ISSN of the first published medium version of the publication. If the print and online versions of the publication are published at the same time, the ISSN of the print version is chosen as the basis of the ISSN-L.

With ISSN-L is possible to designate one single ISSN for all those media versions of the title. The use of ISSN-L facilitates search, retrieval and delivery across all media versions for services like OpenURL, library catalogues, search engines or knowledge bases.

Register

The International Centre maintains a database of all ISSNs assigned worldwide, the ISDS Register (International Serials Data System), otherwise known as the ISSN Register. At the end of 2016, the ISSN Register contained records for 1,943,572 items.[12] The Register is not freely available for interrogation on the web, but is available by subscription.

  • The print version of a serial typically will include the ISSN code as part of the publication information.
  • Most serial 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 serial title.
  • WorldCat permits searching its catalog by ISSN, by entering "issn:" before the code in the query field. One can also go directly to an ISSN's record by appending it to "https://www.worldcat.org/ISSN/", e.g. n2:1021-9749 - Search Results. This does not query the ISSN Register itself, but rather shows whether any WorldCat library holds an item with the given ISSN.

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National library

National library

A national library is a library established by a government as a country's preeminent repository of information. Unlike public libraries, these rarely allow citizens to borrow books. Often, they include numerous rare, valuable, or significant works. A national library is that library which has the duty of collecting and preserving the literature of the nation within and outside the country. Thus, national libraries are those libraries whose community is the nation at large. Examples include the British Library in London, and the Bibliothèque nationale de France in Paris.

Paris

Paris

Paris is the capital and most populous city of France, with an official estimated population of 2,102,650 residents as of 1 January 2023 in an area of more than 105 km², making it the fourth-most populated city in the European Union as well as the 30th most densely populated city in the world in 2022. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, fashion, gastronomy, and science. For its leading role in the arts and sciences, as well as its early and extensive system of street lighting, in the 19th century it became known as "the City of Light". Like London, prior to the Second World War, it was also sometimes called the capital of the world.

Intergovernmental organization

Intergovernmental organization

An intergovernmental organization (IGO) or intergovernmental organisation, also known as an international institution, is an organization composed primarily of sovereign states, or of other organizations through formal treaties for handling/serving common interests and governed by international laws. IGOs are established by a treaty that acts as a charter creating the group. Treaties are formed when lawful representatives (governments) of several states go through a ratification process, providing the IGO with an international legal personality. Intergovernmental organizations are an important aspect of public international law.

UNESCO

UNESCO

The United Nations Educational, Scientific and Cultural Organization is a specialized agency of the United Nations (UN) aimed at promoting world peace and security through international cooperation in education, arts, sciences and culture. It has 193 member states and 12 associate members, as well as partners in the non-governmental, intergovernmental and private sector. Headquartered in Paris, France, UNESCO has 53 regional field offices and 199 national commissions that facilitate its global mandate.

Unique identifier

Unique identifier

A unique identifier (UID) is an identifier that is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. The concept was formalized early in the development of computer science and information systems. In general, it was associated with an atomic data type.

Content (media)

Content (media)

Content is the information contained within communication media. This includes internet, cinema, television, radio, audio CDs, books, magazines, physical art, and live event content. It’s directed at an end-user or audience in the sectors of publishing, art, and communication. Live events include speeches, conferences, and stage performances. Content within media focuses on the attention and how receptive the audience is to the content. Circulation brings the content to everyone and helps spread it to reach large audiences. It is a process in which anyone who encounters any type of content will go through a cycle where they encounter the content, interpret it, and will continue to share it with other people.

OpenURL

OpenURL

An OpenURL is similar to a web address, but instead of referring to a physical website, it refers to an article, book, patent, or other resource within a website.

Search engine

Search engine

A search engine is a software system designed to carry out web searches. They search the World Wide Web in a systematic way for particular information specified in a textual web search query. The search results are generally presented in a line of results, often referred to as search engine results pages (SERPs). When a user enters a query into a search engine, the engine scans its index of web pages to find those that are relevant to the user's query. The results are then ranked by relevancy and displayed to the user. The information may be a mix of links to web pages, images, videos, infographics, articles, research papers, and other types of files. Some search engines also mine data available in databases or open directories. Unlike web directories and social bookmarking sites, which are maintained by human editors, search engines also maintain real-time information by running an algorithm on a web crawler. Any internet-based content that cannot be indexed and searched by a web search engine falls under the category of deep web.

Knowledge base

Knowledge base

A knowledge base (KB) is a set of sentences, each sentence given in a knowledge representation language, with interfaces to tell new sentences and to ask questions about what is known, where either of these interfaces might use inference. It is a technology used to store complex structured data used by a computer system. The initial use of the term was in connection with expert systems, which were the first knowledge-based systems.

WorldCat

WorldCat

WorldCat is a union catalog that itemizes the collections of tens of thousands of institutions, in many countries, that are current or past members of the OCLC global cooperative. It is operated by OCLC, Inc. Many of the OCLC member libraries collectively maintain WorldCat's database, the world's largest bibliographic database. The database includes other information sources in addition to member library collections. OCLC makes WorldCat itself available free to libraries, but the catalog is the foundation for other subscription OCLC services. WorldCat is used by librarians for cataloging and research and by the general public.

Comparison with other identifiers

ISSN and ISBN codes are similar in concept, where ISBNs are assigned to individual books. An ISBN might be assigned for particular issues of a serial, in addition to the ISSN code for the serial as a whole. An ISSN, unlike the ISBN code, is an anonymous identifier associated with a serial title, containing no information as to the publisher or its location. For this reason a new ISSN is assigned to a serial each time it undergoes a major title change.

Extensions

Since the ISSN applies to an entire serial a new identifier, other identifiers have been built on top of it to allow references to specific volumes, articles, or other identifiable components (like the table of contents): the Publisher Item Identifier (PII) and the Serial Item and Contribution Identifier (SICI).

Media versus content

Separate ISSNs are needed for serials in different media (except reproduction microforms). Thus, the print and electronic media versions of a serial need separate ISSNs,[13] and CD-ROM versions and web versions require different ISSNs. However, the same ISSN can be used for different file formats (e.g. PDF and HTML) of the same online serial.

This "media-oriented identification" of serials made sense in the 1970s. In the 1990s and onward, with personal computers, better screens, and the Web, it makes sense to consider only content, independent of media. This "content-oriented identification" of serials was a repressed demand during a decade, but no ISSN update or initiative occurred. A natural extension for ISSN, the unique-identification of the articles in the serials, was the main demand application. An alternative serials' contents model arrived with the indecs Content Model and its application, the digital object identifier (DOI), an ISSN-independent initiative, consolidated in the 2000s.

Only 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".[14]

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ISBN

ISBN

The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. Publishers purchase or receive ISBNs from an affiliate of the International ISBN Agency.

Book

Book

A book is a medium for recording information in the form of writing or images, typically composed of many pages bound together and protected by a cover. The technical term for this physical arrangement is codex. In the history of hand-held physical supports for extended written compositions or records, the codex replaces its predecessor, the scroll. A single sheet in a codex is a leaf and each side of a leaf is a page.

Information

Information

Information is an abstract concept that refers to that which has the power to inform. At the most fundamental level information pertains to the interpretation of that which may be sensed. Any natural process that is not completely random and any observable pattern in any medium can be said to convey some amount of information. Whereas digital signals and other data use discrete signs to convey information, other phenomena and artefacts such as analogue signals, poems, pictures, music or other sounds, and currents convey information in a more continuous form. Information is not knowledge itself, but the meaning that may be derived from a representation through interpretation.

Publisher Item Identifier

Publisher Item Identifier

The Publisher Item Identifier (PII) is a unique identifier used by a number of scientific journal publishers to identify documents. It uses the pre-existing ISSN or ISBN of the publication in question, and adds a character for source publication type, an item number, and a check digit.

Serial Item and Contribution Identifier

Serial Item and Contribution Identifier

The Serial Item and Contribution Identifier (SICI) was a code used to uniquely identify specific volumes, articles or other identifiable parts of a serial. It was "intended primarily for use by those members of the bibliographic community involved in the use or management of serial titles and their contributions". Developed over 1993–1995, NISO adopted SICI as a standard in 1996, then reaffirmed it in 2002. It was withdrawn in 2012.

Microform

Microform

Microforms are scaled-down reproductions of documents, typically either films or paper, made for the purposes of transmission, storage, reading, and printing. Microform images are commonly reduced to about 4% or 1⁄25 of the original document size. For special purposes, greater optical reductions may be used.

Electronic media

Electronic media

Electronic media are media that use electronics or electromechanical means for the audience to access the content. This is in contrast to static media, which today are most often created digitally, but do not require electronics to be accessed by the end user in the printed form. The primary electronic media sources familiar to the general public are video recordings, audio recordings, multimedia presentations, slide presentations, CD-ROM and online content. Most new media are in the form of digital media. However, electronic media may be in either analogue electronics data or digital electronic data format.

CD-ROM

CD-ROM

A CD-ROM is a type of read-only memory consisting of a pre-pressed optical compact disc that contains data. Computers can read—but not write or erase—CD-ROMs. Some CDs, called enhanced CDs, hold both computer data and audio with the latter capable of being played on a CD player, while data is only usable on a computer.

PDF

PDF

Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems. Based on the PostScript language, each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, vector graphics, raster images and other information needed to display it. PDF has its roots in "The Camelot Project" initiated by Adobe co-founder John Warnock in 1991.

HTML

HTML

The HyperText Markup Language or HTML is the standard markup language for documents designed to be displayed in a web browser. It is often assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.

Indecs Content Model

Indecs Content Model

indecs was a project partly funded by the European Community Info 2000 initiative and by several organisations representing the music, rights, text publishing, authors, library and other sectors in 1998-2000, which has since been used in a number of metadata activities. A final report and related documents were published; the indecs Metadata Framework document is a concise summary.

Digital object identifier

Digital object identifier

A digital object identifier (DOI) is a persistent identifier or handle used to uniquely identify various objects, standardized by the International Organization for Standardization (ISO). DOIs are an implementation of the Handle System; they also fit within the URI system. They are widely used to identify academic, professional, and government information, such as journal articles, research reports, data sets, and official publications. DOIs have also been used to identify other types of information resources, such as commercial videos.

Use in URNs

An ISSN can be encoded as a uniform resource name (URN) by prefixing it with "urn:ISSN:".[15] For example, Rail could be referred to as "urn:ISSN:0953-4563". URN namespaces are case-sensitive, and the ISSN namespace is all caps.[16] If the checksum digit is "X" then it is always encoded in uppercase in a URN.

Problems

The URNs are content-oriented, but ISSN is media-oriented:

  • ISSN is not unique when the concept is "a journal is a set of contents, generally copyrighted content": the same journal (same contents and same copyrights) may have two or more ISSN codes. A URN needs to point to "unique content" (a "unique journal" as a "set of contents" reference).
Example: Nature has an ISSN for print, 0028-0836, and another for the same content on the Web, 1476-4687; only the oldest (0028-0836) is used as a unique identifier. As the ISSN is not unique, the U.S. National Library of Medicine needed to create, prior to 2007, the NLM Unique ID (JID).[17]
Example: the DOI name "10.1038/nature13777" can be represented as an HTTP string by https://doi.org/10.1038/nature13777, and is redirected (resolved) to the current article's page; but there is no ISSN online service, like http://dx.issn.org/, to resolve the ISSN of the journal (in this sample 1476-4687).

A unique URN for serials simplifies the search, recovery and delivery of data for various services including, in particular, search systems and knowledge databases.[14] ISSN-L (see Linking ISSN above) was created to fill this gap.

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Rail (magazine)

Rail (magazine)

Rail is a British magazine on the subject of current rail transport in Great Britain. It is published every two weeks by Bauer Consumer Media and can be bought from the travel sections of UK newsstands. It is targeted primarily at the enthusiast market, but also covers issues relating to rail transport.

Nature (journal)

Nature (journal)

Nature is a British weekly scientific journal founded and based in London, England. As a multidisciplinary publication, Nature features peer-reviewed research from a variety of academic disciplines, mainly in science and technology. It has core editorial offices across the United States, continental Europe, and Asia under the international scientific publishing company Springer Nature. Nature was one of the world's most cited scientific journals by the Science Edition of the 2019 Journal Citation Reports, making it one of the world's most-read and most prestigious academic journals. As of 2012, it claimed an online readership of about three million unique readers per month.

Unique identifier

Unique identifier

A unique identifier (UID) is an identifier that is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. The concept was formalized early in the development of computer science and information systems. In general, it was associated with an atomic data type.

Digital object identifier

Digital object identifier

A digital object identifier (DOI) is a persistent identifier or handle used to uniquely identify various objects, standardized by the International Organization for Standardization (ISO). DOIs are an implementation of the Handle System; they also fit within the URI system. They are widely used to identify academic, professional, and government information, such as journal articles, research reports, data sets, and official publications. DOIs have also been used to identify other types of information resources, such as commercial videos.

URL redirection

URL redirection

URL redirection, also called URL forwarding, is a World Wide Web technique for making a web page available under more than one URL address. When a web browser attempts to open a URL that has been redirected, a page with a different URL is opened. Similarly, domain redirection or domain forwarding is when all pages in a URL domain are redirected to a different domain, as when wikipedia.com and wikipedia.net are automatically redirected to wikipedia.org.

Information retrieval

Information retrieval

Information retrieval (IR) in computing and information science is the process of obtaining information system resources that are relevant to an information need from a collection of those resources. Searches can be based on full-text or other content-based indexing. Information retrieval is the science of searching for information in a document, searching for documents themselves, and also searching for the metadata that describes data, and for databases of texts, images or sounds.

Knowledge base

Knowledge base

A knowledge base (KB) is a set of sentences, each sentence given in a knowledge representation language, with interfaces to tell new sentences and to ask questions about what is known, where either of these interfaces might use inference. It is a technology used to store complex structured data used by a computer system. The initial use of the term was in connection with expert systems, which were the first knowledge-based systems.

Media category labels

The two standard categories of media in which serials are most available are print and electronic. In metadata contexts (e.g., JATS), these may have standard labels.

Print ISSN

p-ISSN is a standard label for "Print ISSN", the ISSN for the print media (paper) version of a serial. Usually it is the "default media" and so the "default ISSN".

Electronic ISSN

e-ISSN (or eISSN) is a standard label for "Electronic ISSN", the ISSN for the electronic media (online) version of a serial.[18]

Source: "International Standard Serial Number", Wikipedia, Wikimedia Foundation, (2023, March 15th), https://en.wikipedia.org/wiki/International_Standard_Serial_Number.

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See also
References
  1. ^ a b "What is an ISSN?". Paris: ISSN International Centre. Retrieved 13 July 2014.
  2. ^ "Collection Metadata Standards". British Library. Retrieved 14 July 2014.
  3. ^ "ISSN, a Standardised Code". Paris: ISSN International Centre. Retrieved 13 July 2014.
  4. ^ ISSN InterNational Centre. "The ISSN for electronic media". ISSN. Retrieved 3 April 2020.
  5. ^ "3". ISSN Manual (PDF). Paris: ISSN International Centre. January 2015. pp. 14, 16, 55–58. Archived from the original (PDF) on 12 July 2020. Retrieved 22 October 2018. HTML version available at www.issn.org
  6. ^ ISSN-L-resolver on GitHub
  7. ^ Thren, Slawek Rozenfeld (January 2001). "Using The ISSN (International Serial Standard Number) as URN (Uniform Resource Names) within an ISSN-URN Namespace". tools.ietf.org. doi:10.17487/RFC3044.{{cite journal}}: CS1 maint: url-status (link)
  8. ^ issn-resolver on GitHub
  9. ^ "Online ISSN Validator". Journal Seeker. Retrieved 9 August 2014.
  10. ^ Identification with the GTIN 13 barcode. ISSN International Centre. Archived from the original on 29 June 2020.
  11. ^ Kansalliskirjasto, Nationalbiblioteket, The National Library of Finland. "Kansalliskirjasto, Nationalbiblioteket, The National Library of Finland". nationallibrary.fi.{{cite web}}: CS1 maint: multiple names: authors list (link)
  12. ^ "Total number of records in the ISSN Register" (PDF). ISSN International Centre. February 2017. Retrieved 23 February 2017.
  13. ^ "ISSN for Electronic Serials". U.S. ISSN Center, Library of Congress. 19 February 2010. Retrieved 12 July 2014.
  14. ^ a b "The ISSN-L for publications on multiple media". ISSN International Centre. Retrieved 12 July 2014.
  15. ^ Rozenfeld, Slawek (January 2001). "Using The ISSN (International Serial Standard Number) as URN (Uniform Resource Names) within an ISSN-URN Namespace". IETF Tools. doi:10.17487/RFC3044. RFC 3044. Retrieved 15 July 2014.
  16. ^ Powell, Andy; Johnston, Pete; Campbell, Lorna; Barker, Phil (21 June 2006). "Guidelines for using resource identifiers in Dublin Core metadata §4.5 ISSN". Dublin Core Architecture Wiki. Archived from the original on 13 May 2012.
  17. ^ "MEDLINE/PubMed Data Element (Field) Descriptions". U.S. National Library of Medicine. 7 May 2014. Retrieved 19 July 2014.
  18. ^ "La nueva Norma ISSN facilita la vida de la comunidad de las publicaciones en serie", A. Roucolle. "La nueva norma ISSN". Archived from the original on 10 December 2014. Retrieved 29 October 2014.
  19. ^ "Road in a nutshell". Road.issn.org. Archived from the original on 5 September 2017. Retrieved 12 September 2017.
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