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.

  • Script error: No such module "cs1 documentation support".: 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: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: Amazon Standard Identification Number; if first character of Script error: No such module "cs1 documentation support". value is a digit, use Script error: No such module "cs1 documentation support".. Because this link favours one specific distributor, include it only if standard identifiers are not available. Example |asin=B00005N5PF. Aliases: Script error: No such module "cs1 documentation support"..
    • Script error: No such module "cs1 documentation support".: ASIN top-level domain for Amazon sites other than the US; valid values: au, br, ca, cn, co.jp, co.uk, de, es, fr, it, mx. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: bibcode; used by a number of astronomical data systems; for example: 1974AJ.....79..819H. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: bioRxiv id, a 6-digit number at the end of the biorXiv URL (e.g. 078733 for http://biorxiv.org/content/early/2016/10/01/078733 or https://dx.doi.org/10.1101/078733). Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: CiteSeerX id, a string of digits and dots found in a CiteSeerX URL (e.g. 10.1.1.176.341 for http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.176.341). Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: Digital object identifier; for example: 10.1038/news070508-7. It is checked to ensure it begins with (10.). Aliases: Script error: No such module "cs1 documentation support"..
    • Supports accept-this-as-written markup to indicate valid DOIs using a non-standard format, see below.
    • Script error: No such module "cs1 documentation support".: Date a valid DOI was found to be non-working/inactive at https://dx.doi.org. Use the same format as other dates in the article. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: International Standard Serial Number for the electronic media of a serial publication; eight characters may be split into two groups of four using a hyphen, but not an en dash or a space; example |eissn=1557-2986. Aliases: Script error: No such module "cs1 documentation support"..
    • Supports accept-this-as-written markup to indicate valid eISSNs using a non-standard format, see below.
  • Script error: No such module "cs1 documentation support".: Handle System identifier for digital objects and other resources on the Internet; example |hdl=20.1000/100. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: International Standard Book Number; for example: 978-0-8126-9593-9. (See Wikipedia:ISBN and ISBN § Overview.) 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 Script error: No such module "cs1 documentation support".. 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: Script error: No such module "cs1 documentation support"..
    • Supports accept-this-as-written markup to indicate valid ISBNs using a non-standard format, see below.
  • Script error: No such module "cs1 documentation support".: International Standard Music Number; for example: 979-0-9016791-7-7. Hyphens 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: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: International Standard Serial Number; eight characters may be split into two groups of four using a hyphen, but not an en dash or a space; example |issn=2049-3630. Aliases: Script error: No such module "cs1 documentation support"..
    • Supports accept-this-as-written markup to indicate valid ISSNs using a non-standard format, see below.
  • Script error: No such module "cs1 documentation support".: Jahrbuch über die Fortschritte der Mathematik; example |jfm=53.0144.01. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: JSTOR reference number; for example: |jstor=3793107. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: Library of Congress Control Number. 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: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: Mathematical Reviews; example |mr=630583. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: OCLC Number for looking up publications in the WorldCat union catalog; example |oclc=9355469. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: Open Library identifier; do not include "OL" in the value; example |ol=7030731M. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: Office of Scientific and Technical Information; example |osti=4367507. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: PubMed Central; use article number for open repository full-text of a journal article, e.g. |pmc=345678. Do not include "PMC" in the value. See also the Script error: No such module "cs1 documentation support". parameter, below; these are two different identifiers.. Aliases: Script error: No such module "cs1 documentation support"..
    • Script error: No such module "cs1 documentation support".: Date that Script error: No such module "cs1 documentation support". goes live; if this date is in the future, then Script error: No such module "cs1 documentation support". is not linked until that date. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: PubMed; use unique identifier; example |pmid=17322060 See also the Script error: No such module "cs1 documentation support". parameter, above; these are two different identifiers. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: Request for Comments; example |rfc=3143. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: Standard Book Number; example |sbn=356-02201-3. Aliases: Script error: No such module "cs1 documentation support"..
    • Supports accept-this-as-written markup to indicate valid SBNs using a non-standard format, see below.
  • Script error: No such module "cs1 documentation support".: Social Science Research Network; example |ssrn=1900856. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: Semantic Scholar corpus ID; example |s2cid=37220927. Aliases: Script error: No such module "cs1 documentation support"..
  • Script error: No such module "cs1 documentation support".: Zentralblatt MATH; example |zbl=0472.53010 For zbMATH search results like JFM 35.0387.02 use |jfm=35.0387.02. Aliases: Script error: No such module "cs1 documentation support"..

In very rare cases, valid identifiers (f.e., as actually printed on publications) do not follow their defined standard format or use non-conforming checksums, which 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 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 using the corresponding |<param>-access= parameter.

For {{cite journal}}, 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 to a resource that would not otherwise be obviously accessible.