$ximple_tree = { 
                    tag_name => "unicycle"
                    attrib   => { color  => "chrom",
                                  height => 3,
                                  brand  => "foo"}
                    content  => ["The content of a ximple tree\n",
                                 "is heterogenious just like xml",
                                 "itself. For example this is how\n",
                                 "i would make the word",
                                 {
                                  tag_name=>"bold",
                                   attrib=>{},
                                   content=>["cheese"]
                                  },
                                 "appear in a bold tag"]
                  };