Template:MediaWiki URL rules


 * URLs must begin with a supported URI scheme:  and   will be supported by all browsers; ,  ,  ,  ,   and   will require a plugin or an external application and should normally be avoided. IPv6 host-names are currently not supported.
 * If URLs in citation template parameters contain certain characters they will display and link incorrectly. Those characters need to be percent-encoded. For example, a space must be replaced by . To encode the URL, replace these characters:


 * Single apostrophes do not need to be encoded; but unencoded multiples will be parsed as italic or bold markup. Single curly closing braces also do not need to be encoded; but an unencoded pair will be parsed as the double closing braces for the template transclusion.