Title: Template:Citation Style documentation/id2 - freem

URL Source: https://freemwiki.com/index.php?mobileaction=toggle_view_mobile&oldid=579932&title=Template%3ACitation_Style_documentation%2Fid2

Markdown Content:
The following identifiers create links and are designed to accept a single value. Using multiple values or other text will break the link and/or invalidate the identifier. In general, the parameters should include only the variable part of the identifier, e.g. `|rfc=822` or `|pmc=345678`.

*   **arxiv**: [arXiv](https://freemwiki.com/index.php?title=ArXiv&action=edit&redlink=1 "ArXiv (page does not exist)")[identifier](https://arxiv.org/help/arxiv_identifier); for example: `|arxiv=hep-th/9205027` (before April 2007) or `|arxiv=0706.0001` (April 2007 – December 2014) or `|arxiv=1501.00001` (since January 2015). Do not include extraneous file extensions like ".pdf" or ".html". Aliases: **eprint**.
*   **asin**: [Amazon Standard Identification Number](https://freemwiki.com/index.php?title=Amazon_Standard_Identification_Number&action=edit&redlink=1 "Amazon Standard Identification Number (page does not exist)"); if first character of **asin** value is a digit, use **isbn**. Because this link favours one specific distributor, include it only if standard identifiers are not available. Example `|asin=B00005N5PF`. Aliases: **ASIN**. 
    *   **asin-tld**: ASIN top-level domain for Amazon sites other than the US; valid values: {{#lst:Help:CS1 errors|asin-tld_values_list}}. Aliases: none.

*   **bibcode**: [bibcode](https://freemwiki.com/index.php?title=Bibcode&action=edit&redlink=1 "Bibcode (page does not exist)"); used by a number of astronomical data systems; for example: `1974AJ.....79..819H`. Aliases: none.
*   **biorxiv**: [bioRxiv](https://freemwiki.com/index.php?title=BioRxiv&action=edit&redlink=1 "BioRxiv (page does not exist)") id, as in the entire DOI (e.g. `10.1101/078733` for [http://biorxiv.org/content/early/2016/10/01/078733](http://biorxiv.org/content/early/2016/10/01/078733) or [https://doi.org/10.1101/078733](https://doi.org/10.1101/078733); `10.1101/2020.07.24.220400` for [https://doi.org/10.1101/2020.07.24.220400](https://doi.org/10.1101/2020.07.24.220400)). Aliases: none.
*   **citeseerx**: [CiteSeerX](https://freemwiki.com/index.php?title=CiteSeerX&action=edit&redlink=1 "CiteSeerX (page does not exist)") id, a string of digits and dots found in a CiteSeerX URL (e.g. `10.1.1.176.341` for [https://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.176.341](https://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.176.341)). Aliases: none.
*   **doi**: [Digital object identifier](https://freemwiki.com/index.php?title=Digital_object_identifier&action=edit&redlink=1 "Digital object identifier (page does not exist)"); for example: `10.1038/news070508-7`. It is checked to ensure it begins with (`10.`). Aliases: **DOI**. 
    *   Supports accept-this-as-written markup to indicate _valid_ DOIs using a non-standard format, see [below](https://freemwiki.com/index.php?mobileaction=toggle_view_mobile&oldid=579932&title=Template%3ACitation_Style_documentation%2Fid2#ATAWM).
    *   **doi-broken-date**: Date a valid DOI was found to be non-working/inactive at [https://doi.org](https://doi.org/). Use the same format as other dates in the article. Aliases: none.

*   **eissn**: [International Standard Serial Number](https://freemwiki.com/index.php?title=International_Standard_Serial_Number&action=edit&redlink=1 "International Standard Serial Number (page does not exist)") for the electronic media of a serial publication; eight characters may be split into two groups of four using a [hyphen](https://freemwiki.com/index.php?title=Hyphen&action=edit&redlink=1 "Hyphen (page does not exist)"), but not an [en dash](https://freemwiki.com/index.php?title=Dash&action=edit&redlink=1 "Dash (page does not exist)") or a space; example `|eissn=1557-2986`. Aliases: **EISSN**. 
    *   Supports accept-this-as-written markup to indicate _valid_ eISSNs using a non-standard format, see [below](https://freemwiki.com/index.php?mobileaction=toggle_view_mobile&oldid=579932&title=Template%3ACitation_Style_documentation%2Fid2#ATAWM).

*   **hdl**: [Handle System](https://freemwiki.com/index.php?title=Handle_System&action=edit&redlink=1 "Handle System (page does not exist)") identifier for digital objects and other resources on the Internet; example `|hdl=20.1000/100`. Aliases: **HDL**.
*   **isbn**: [International Standard Book Number](https://freemwiki.com/index.php?title=International_Standard_Book_Number&action=edit&redlink=1 "International Standard Book Number (page does not exist)"); for example: `978-0-8126-9593-9`. (See [Wikipedia:ISBN](https://en.wikipedia.org/wiki/ISBN "wikipedia:ISBN") and [ISBN §Overview](https://freemwiki.com/index.php?title=ISBN&action=edit&redlink=1 "ISBN (page does not exist)").) Hyphens in the ISBN are optional, but preferred. Use the ISBN actually printed on or in the book. Use the 13-digit ISBN – beginning with 978 or 979 – when it is available. If only a 10-digit ISBN is printed on or in the book, use it. ISBNs can be found on the page with the publisher's information – usually the back of the title page – or beneath the barcode as a number beginning with 978 or 979 (barcodes beginning with any other numbers are not ISBNs). For sources with the older 9-digit SBN system, use **sbn**. Do not convert a 10-digit ISBN to 13-digit by just adding the 978 prefix; the last digit is a calculated check digit and just making changes to the numbers will make the ISBN invalid. This parameter should hold only the ISBN without _any_ additional characters. It is checked for length, invalid characters – anything other than numbers, spaces, and hyphens, with "X" permitted as the last character in a 10-digit ISBN – and the proper check digit. Aliases: **ISBN**. 
    *   Use the {{[Format ISBN](https://freemwiki.com/index.php?title=Template:Format_ISBN&action=edit&redlink=1 "Template:Format ISBN (page does not exist)")}} template within the parameter– in the form `|isbn={{Format ISBN|9780812695939}}`– if you are unsure of how any particular ISBN should be hyphenated, as the pattern varies by country and publisher.
    *   Supports accept-this-as-written markup to indicate _valid_ ISBNs using a non-standard format, see [below](https://freemwiki.com/index.php?mobileaction=toggle_view_mobile&oldid=579932&title=Template%3ACitation_Style_documentation%2Fid2#ATAWM).

*   **ismn**: [International Standard Music Number](https://freemwiki.com/index.php?title=International_Standard_Music_Number&action=edit&redlink=1 "International Standard Music Number (page does not exist)"); for example: `979-0-9016791-7-7`. [Hyphens](https://freemwiki.com/index.php?title=Hyphens&action=edit&redlink=1 "Hyphens (page does not exist)") or spaces in the ISMN are optional. Use the ISMN actually printed on or in the work. This parameter should hold only the ISMN without _any_ additional characters. It is checked for length, invalid characters – anything other than numbers, spaces, and hyphens – and the proper check digit. Aliases: **ISMN**.
*   **issn**: [International Standard Serial Number](https://freemwiki.com/index.php?title=International_Standard_Serial_Number&action=edit&redlink=1 "International Standard Serial Number (page does not exist)"); eight characters may be split into two groups of four using a [hyphen](https://freemwiki.com/index.php?title=Hyphen&action=edit&redlink=1 "Hyphen (page does not exist)"), but not an [en dash](https://freemwiki.com/index.php?title=Dash&action=edit&redlink=1 "Dash (page does not exist)") or a space; example `|issn=2049-3630`. Aliases: **ISSN**. 
    *   Supports accept-this-as-written markup to indicate _valid_ ISSNs using a non-standard format, see [below](https://freemwiki.com/index.php?mobileaction=toggle_view_mobile&oldid=579932&title=Template%3ACitation_Style_documentation%2Fid2#ATAWM).

*   **jfm**: _[Jahrbuch über die Fortschritte der Mathematik](https://freemwiki.com/index.php?title=Jahrbuch\_%C3%BCber\_die\_Fortschritte\_der\_Mathematik&action=edit&redlink=1 "Jahrbuch über die Fortschritte der Mathematik (page does not exist)")_; do not include "JFM" in the value; example `|jfm=53.0144.01`. Aliases: **JFM**.
*   **jstor**: [JSTOR](https://freemwiki.com/index.php?title=JSTOR&action=edit&redlink=1 "JSTOR (page does not exist)") reference number; for example: `|jstor=3793107`. Aliases: **JSTOR**.
*   **lccn**: [Library of Congress Control Number](https://freemwiki.com/index.php?title=Library_of_Congress_Control_Number&action=edit&redlink=1 "Library of Congress Control Number (page does not exist)"). When present, alphabetic prefix characters are to be lower case and without a space; example `|lccn=79-57364` or `|lccn=2004042477` or `|lccn=e09001178`. Aliases: **LCCN**.
*   **mr**: [Mathematical Reviews](https://freemwiki.com/index.php?title=Mathematical_Reviews&action=edit&redlink=1 "Mathematical Reviews (page does not exist)"); example `|mr=630583`. Aliases: **MR**.
*   **oclc**: [OCLC Number](https://freemwiki.com/index.php?title=OCLC_Number&action=edit&redlink=1 "OCLC Number (page does not exist)") for looking up publications in the [WorldCat](https://freemwiki.com/index.php?title=WorldCat&action=edit&redlink=1 "WorldCat (page does not exist)")[union catalog](https://freemwiki.com/index.php?title=Union_catalog&action=edit&redlink=1 "Union catalog (page does not exist)"); example `|oclc=9355469`. Aliases: **OCLC**.
*   **ol**: [Open Library](https://freemwiki.com/index.php?title=Open_Library&action=edit&redlink=1 "Open Library (page does not exist)") identifier; do not include "OL" in the value; example `|ol=7030731M`. Aliases: **OL**.
*   **osti**: [Office of Scientific and Technical Information](https://freemwiki.com/index.php?title=Office_of_Scientific_and_Technical_Information&action=edit&redlink=1 "Office of Scientific and Technical Information (page does not exist)"); example `|osti=4367507`. Aliases: **OSTI**.
*   **pmc**: [PubMed Central](https://freemwiki.com/index.php?title=PubMed_Central&action=edit&redlink=1 "PubMed Central (page does not exist)"); use article number for [open repository](https://freemwiki.com/index.php?title=Open_repository&action=edit&redlink=1 "Open repository (page does not exist)") full-text of a journal article, e.g. `|pmc=345678`. Do not include "PMC" in the value. See also the **pmid** parameter, below; these are two different identifiers. Aliases: **PMC**. 
    *   **pmc-embargo-date**: Date that **pmc** goes live; if this date is in the future, then **pmc** is not linked until that date. Aliases: none.

*   **pmid**: [PubMed](https://freemwiki.com/index.php?title=PubMed&action=edit&redlink=1 "PubMed (page does not exist)"); use unique identifier; example `|pmid=17322060`See also the **pmc** parameter, above; these are two different identifiers. Aliases: **PMID**.
*   **rfc**: [Request for Comments](https://freemwiki.com/index.php?title=Request_for_Comments&action=edit&redlink=1 "Request for Comments (page does not exist)"); example `|rfc=3143`. Aliases: **RFC**.
*   **sbn**: [Standard Book Number](https://freemwiki.com/index.php?title=Standard_Book_Number&action=edit&redlink=1 "Standard Book Number (page does not exist)"); example `|sbn=356-02201-3`. Aliases: **SBN**. 
    *   Supports accept-this-as-written markup to indicate _valid_ SBNs using a non-standard format, see [below](https://freemwiki.com/index.php?mobileaction=toggle_view_mobile&oldid=579932&title=Template%3ACitation_Style_documentation%2Fid2#ATAWM).

*   **ssrn**: [Social Science Research Network](https://freemwiki.com/index.php?title=Social_Science_Research_Network&action=edit&redlink=1 "Social Science Research Network (page does not exist)"); example `|ssrn=1900856`. Aliases: **SSRN**.
*   **s2cid**: [Semantic Scholar](https://freemwiki.com/index.php?title=Semantic_Scholar&action=edit&redlink=1 "Semantic Scholar (page does not exist)") corpus ID; example `|s2cid=37220927`. Aliases: **S2CID**.
*   **zbl**: [Zentralblatt MATH](https://freemwiki.com/index.php?title=Zentralblatt_MATH&action=edit&redlink=1 "Zentralblatt MATH (page does not exist)"); example `|zbl=0472.53010` For zbMATH search results like `JFM 35.0387.02` use `|jfm=35.0387.02`. Aliases: **ZBL**.

In very rare cases, identifiers are published which do not follow their defined standard format or use non-conforming checksums. These would typically cause an error message to be shown. Do not alter them to match a different checksum. In order to suppress the error message, some identifiers (`|doi=`, `|eissn=`, `|isbn=`, `|issn=`, and `|sbn=`) support a special [accept-this-as-written markup](https://freemwiki.com/index.php?title=Help:Citation_Style_1&action=edit&redlink=1 "Help:Citation Style 1 (page does not exist)") which can be applied to disable the error-checking (as `|<param>=((<value>))`). If the problem is down to a mere typographical error in a third-party source, correct the identifier value instead of overriding the error message.

For some identifiers, it is possible to specify the [access status](https://freemwiki.com/index.php?title=Help:Citation_Style_1&action=edit&redlink=1 "Help:Citation Style 1 (page does not exist)") using the corresponding `|<param>-access=` parameter.

For {{[cite journal](https://freemwiki.com/index.php?title=Template:Cite_journal&action=edit&redlink=1 "Template:Cite journal (page does not exist)")}}, some identifiers (specifying free resources) will automatically be linked to the title when `|url=` and `|title-link=` are not used to specify a different link target. This behaviour can be overridden by one out of a number of special keywords for `|title-link=` to manually select a specific source (`|title-link=pmc` or `|title-link=doi`) for auto-linking or to disable the feature (`|title-link=none`).

It is not necessary to specify a URL to a link _identical_ to a link also produced by an identifier. The `|url=` parameter (or `|title-link=`) can then be used for providing a direct deep link to the corresponding document or a [convenience link](https://en.wikipedia.org/wiki/Citing_sources#Convenience_links "wikipedia:Citing sources") to a resource that would not otherwise be obviously accessible.