我在Eclipse的java webapp项目中有一个sitemap.xml，但出现错误
Description Resource Path Location Type
Referenced file contains errors (http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd). For more information, right click on the message in the Problems View and select "Show Details..." sitemap.xml /dt/src/main/webapp/dist line 1 XML Problem
sitemap.xml
<?xml version="1.0" encoding="UTF-8"?>
<urlset
xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
<!-- created with Free Online Sitemap Generator www.xml-sitemaps.com -->
</urlset>