XML（可扩展性标记语言）不仅支持自定义标记，还能表达语义，因而为提高网络搜索的准确性提供了可能。

The extensible markup language (XML) supports the mark that is defined by users and can express semantics, which makes it possible to improve the accuracy of searching on the Interact.

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XML作为一种元标记语言，由于其良好的数据存储格式、可扩展性、高度结构化以及便于网络传输等特点，已经逐渐成为网络数据交互的标准。

XML is becoming a standard for data communication through the Internet because of its good data-storing form, expandability, hyper-structuralization and web-transforming, etc.

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