tag:use

Loads a tag specified with the tagid attribute and assigns it to the variable specified with the var attribute.

Syntax
<tag:use
   tagId="..."
   var="...">
   ...
</tag:use>
Attributes
tagId, mandatory

The scheme or URI of the tag to be loaded.

var, mandatory, no runtime expressions

The name of the scripting variable to which the specified tag is to be loaded.