docs: function(dom_node, interesting_tags) {
          var tag_list = dom_node.getElementsByTagName("tag");
          var tags = {};
          var interesting = false;
          for (var j = 0; j < tag_list.length; j++) {
              var key = tag_list[j].getAttribute("k");
              tags[key] = tag_list[j].getAttribute("v");
              if (interesting_tags) {
                  if (!this.interestingTagsExclude[key]) {
                      interesting = true;
                  }
              }    
          }  
          return interesting_tags ? [tags, interesting] : tags;     
      }