对网页的标记使得搜索引擎能理解网页的信息和提供更丰富的搜索结果，这样用户可以在网上更方便地查找相关资料。
On-page markup enables search engines to understand the information on web pages and provide richer search results in order to make it easier for users to find relevant information on the web.
将资源绑定到名称空间，这样应用程序就可以动态地对其进行查找。
The resources are bound into the namespace so that they can be looked up dynamically by an application.
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