docs: function(options) {
          if(window.ActiveXObject) {
              this.xmldom = new ActiveXObject("Microsoft.XMLDOM");
          }
          OpenLayers.Format.prototype.initialize.apply(this, [options]);
          // clone the namespace object and set all namespace aliases
          this.namespaces = OpenLayers.Util.extend({}, this.namespaces);
          this.namespaceAlias = {};
          for(var alias in this.namespaces) {
              this.namespaceAlias[this.namespaces[alias]] = alias;
          }
      }