You can find details about the XML schema for the Sitemapprotocol on the Sitemaps 0.90 protocol page.
可以在Sitemaps 0.90协议页面上找到有关Sitemap协议XML模式的详细信息。
2
The sitemapprotocol is based on a straight forward and intuitively structured XML file, which is composed of a list of URLs and their associated metadata.
Overall Sitemaps 0.90 protocol offers an improvement in terms of crawling efficiency that cannot be accomplished using regular sitemap references and robot directives combined.