External links only make sense if the target article supports in comprehending an article, for example a certain standard or norm that is used by or in {{UBIK}}, i.e. [http://en.wikipedia.org/wiki/ISO_15926 ISO15926].
=== Linking to category pages ===
Unlike links to other pages, <code><nowiki>[[Category:CategoryName]]</nowiki></code> will not work as a link. For that, you need to add ":" at the beginning like <code><nowiki>[[:Category:CategoryName]]</nowiki></code>.
=== Download links ===