anchor.diff:        
       });
     },
  +  clean_data: function(filtered_data) {
  +    $.each(filtered_data, function(i, el) {
  +      delete el.parent_playlist;
  +      delete el.level;
  +      delete el.has_url;
  +      delete el.user;
  +      delete el.root;
  +      if(el.has_children) {
  +        el.children = playlists_import.clean_data(el.children);
  +      }
  +    });
  +    return filtered_data;
  +  },
     generate_data: function(modify_root_key) {
       var lines = $('#playlist_input textarea').val().split('\n');
       lines.push('ENDCONTENT');
  
positive.code:                              has_url: false, 
                               media_type: false,
                               collage_item: false,
                               remix_item: false };
              current_playlist.has_children = true;
              current_playlist.children.push(new_item);
              current_item = new_item;
  
negative.code:     var current_playlist = data[0];
      var current_item = data[0];
      var current_nest_level = 0;
      var working_content = '';
      for(var i = 0; i < lines.length; i++) {
        var line = lines[i];
  