View source for Template:Ambox/category

{{#if:{{{cat|}}}
 |{{#if:{{{date|}}}
  |[[Category:{{{cat}}} {{{preposition|from}}} {{{date}}}]]{{#ifexist:Category:{{{cat}}} {{{preposition|from}}} {{{date}}}|
   |[[Category:Articles with invalid date parameter in template]]
  }}
  |[[Category:{{{cat}}}]]
 }}
}}{{#if:{{{all|}}}
 |[[Category:{{{all}}}]]
}}