Templates in different versions of MediaWiki Bantuan:Templat
Version 1.7
ParserFunctions were added. Before they were available, multiple assignments of parameters with the same name (and thus allowing parameter overrides) were ingeniously used to perform branching, e.g. in the now deleted en:Template:If defined.
Including the same template more than five times in the same page works from version 1.4, now on all Wikimedia sites. Also new was that subst can be used with parameters.
Version 1.3
A specific template namespace is created. Templates are no longer stored in MediaWiki namespace.[4]
See, among other things, default values of parameters. Starting with version 1.3 the prefix "msg:" is generally optional.
Version 1.2.6
Templates and MediaWiki interface messages are both stored in MediaWiki namespace: make a page MediaWiki:mytemplate and refer to it with {{msg:mytemplate}}. In this version parameters are not possible.
Compatibility with 1.3, in the sense of having the content in Template:mytemplate, is possible with a redirect from MediaWiki:mytemplate to Template:mytemplate on the 1.2.6 project.
Version 1. ..
Special:BookSources generates a page with external links based on Wikipedia:Book sources by replacing MAGICNUMBER with the ISBN to be entered. To some extent, this is a precursor to templates.
