查看“Template:Transclude”的源代码

{{#switch: {{NAMESPACE: {{{1}}} }}
 |#default = {{FULLPAGENAME: {{{1}}} }} <!-- eg "User:Foo" -->
 |{{ns:0}} = 
    {{#ifeq: {{NAMESPACE: {{{1}}} }} | {{NAMESPACE: Template{{{1}}} }}
      | Template:{{{1}}}            <!-- no leading colon, eg "Foo" -->
      | {{PAGENAME: {{{1}}} }}      <!-- leading colon, eg ":Foo", so we want the article -->
    }}
}}