Template:Please check ISSN
 | This template is used on approximately 15,000 pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them. |
 | This template should not be used in citation templates such as Citation Style 1 and Citation Style 2, because it includes markup that will pollute the COinS metadata they produce; see Wikipedia:COinS. |
Usage
This template is used to mark an International Standard Serial Number (ISSN) that may not be valid. For example:
{{issn|1234-56789}} {{Please check ISSN}}
The template does not produce any visible change to the article (unless the article is viewed in preview mode):
ISSN 1234-56789 Parameter error in {{issn}}: Invalid ISSN.
Rather, it adds the article to the hidden maintenance/tracking category: Category:Articles with invalid ISSNs.
In preview mode, it shows the warning message (Warning: Check ISSN). This warning is shown only in preview mode.
Parameters
The optional parameter |reason= simply provides a comment to explain why the ISSN may not be valid. For example:
{{issn|1234-56789}} {{Please check ISSN|reason=Too many digits.}}
See also
- {{ISSN-needed}}
- {{Listed Invalid ISSN}}