Editing Help:Citation Style 1 (section)

====Using |format= ====
When MediaWiki encounters an external link URL with a '.pdf' or '.PDF' [[filename extension|extension]], it renders the external link with a [https://example.com/document.pdf PDF icon] in place of the usual [https://example.com/document external-link icon].  To make rendered cs1|2 citations that link to PDF documents somewhat more accessible, cs1|2 automatically adds a parenthetical PDF annotation so that those readers using screen-reader technology can know the type of the linked file.  This is imperfect because some on-line sources redirect .pdf URLs to .html landing pages (this is common for PDF documents behind paywalls or registration barriers).  Because the parenthetical PDF annotation happens automatically, editors are not required to set {{para|format|PDF}}, though doing so causes no harm.  The {{para|format|PDF}} parameter may be deleted as part of a more substantial edit but editors should consider that many cs1|2 templates are copied from en.Wikipedia to other-language Wikipedias when articles here are translated to that other language.  Do not assume that other-language Wikipedias use up-to-date cs1|2 templates; many do not, so removing {{para|format|PDF}} here can affect readers/translators at other Wikipedias.