docs: function(options) {
          OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
          this.setGeometryTypes();
          if(options && options.featureNS) {
              this.setNamespace("feature", options.featureNS);
          }
          this.singleFeatureType = !options || (typeof options.featureType === "string");
      }