| $[deferred_content refs] - Deferred Content References
                          These are identical to ${content_refs},
                          but are evaluated only after all other references.
                          
                         
                          
                            $[name]
                           
                          This means that a content variable can be set at the end of an <out> section, but referred to at the start, for example. Handy for HTML page
                          titles.
                          
                         
                          In addition, this is the recommended way to access metadata set using the
                          wmmeta tag.
                          
                         
                          Again, a default value can be supplied, using this format:
                          
                         
                          
                            $[name?defaultvalue]
                           
                          
                         |