Include another template in the template.

{INCLUDE [ONCE] <INCLUDE PAGE>}

The <INCLUDE PAGE> can be any of the data types that are supported by the template language (see Section 1.4.3, “Data types”).

By specifiying the keyword ONCE before the name of template to include, you can make sure that that template is only included once per page.

It is not possible to use a dynamic INCLUDE statement (one where the <INCLUDE PAGE> is set through a template variable) within a LOOP statement, in case the included template needs to have access to the active LOOP element. There is no problem if you use a static INCLUDE statement (one where the <INCLUDE PAGE> is set through a string value).

If you really need this kind of functionality though, you can work around this limitation by assigning the active LOOP element to a new template variable, prior to including the dynamic <INCLUDE PAGE>. Example:

{! include_page holds the dynamic page to include }
{VAR include_page "some_page"}

{LOOP loop_variable}
  {! Makes loop_variable available as temp_variable in the include }
  {VAR temp_variable loop_variable}
  {INCLUDE include_page}
{/LOOP loop_variable} 

This way you can access the active LOOP element from the included template through temp_variable. If you would access loop_variable from there, you'd see that it does not contain the active LOOP element, but the full array that you are looping over instead.