KML 文件和自定义类

我有这个 kml 文件：

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
  <Document>
    <Placemark>
      <name>CDATA example</name>
      <description>
        <![CDATA[
          <h1>CDATA Tags are useful!</h1>
          <p><font color="red">Text is <i>more readable</i> and 
          <b>easier to write</b> when you can avoid using entity 
          references.</font></p>
        ]]>
      </description>
      <Point>
        <coordinates>102.595626,14.996729</coordinates>
      </Point>
    </Placemark>
  </Document>
</kml>

（示例取自谷歌地图文档）当我将类添加到 KML 内部的 href 时：

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
  <Document>
    <Placemark>
      <name>CDATA example</name>
      <description>
        <![CDATA[
          <h1>CDATA Tags are useful!</h1>
          <p><font color="red">Text is <i>more readable</i> and 
          <b>easier to write</b> when you can avoid using entity 
          references.<a class="read_more" href="http://google.com">Read More</a></font></p>
        ]]>
      </description>
      <Point>
        <coordinates>102.595626,14.996729</coordinates>
      </Point>
    </Placemark>
  </Document>
</kml>

KMl 只是剥离它，我猜这是由于"内容清理"https://developers.google.com/earth/documentation/balloons

这是我当前的JavaScript：

jQuery(document).ready(function($) {    
        function initialize() {
        var myLatlng = new google.maps.LatLng(51.201465,-0.30244);
          var mapOptions = {
            zoom: 12,
            center: myLatlng,
            mapTypeId: google.maps.MapTypeId.ROADMAP
          };
          var map = new google.maps.Map(document.getElementById('map-canvas'),
              mapOptions);
          var kmlLayer = new google.maps.KmlLayer({
            url: 'http://*****.com/new/wp-content/themes/required-starter/KML_Samples.kml?rand='+(new Date()).valueOf(),
            suppressInfoWindows: false,
            map: map
          });
          google.maps.event.addListener(kmlLayer, 'click', function(kmlEvent) {
            var text = kmlEvent.featureData.description;
           alert(text);
          });
        }
        google.maps.event.addDomListener(window, 'load', initialize);
});

我找不到正确的参数来停止数据清理，也找不到 kml 文档中将类添加到描述包装器或气泡的选项。我想这是由于我的无能，请帮忙！克里斯