Template:MediaWiki URL rules


 * URLs must begin with a supported URI scheme.  and   will be supported by all browsers; however, ,  ,  ,  ,   and   will require a plug-in 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, then 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 the following characters with:


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