原文:http://www.cnblogs.com/qiangsheng/archive/2008/03/21/1115743.html
The "eXtensible Markup Language" is a data format for structured document interchange on the Web. XML itself is not a markup language, such as HTML, but rather a metalanguage used to create other specialized languages. XML documents will be increasingly used to allow collaboration, that is to say exchanging business documents on the Internet.
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分隔线上面是 SAP 标准文档中提供的说明
分隔线下面是我的翻译
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可扩展标记语言(eXtensible Markup Language)是一种结构化 Web 上交互的文档的数据格式。XML 本身并非一种标记语言,如 HTML,而是用来创建其他专门语言的元语言。为了便于协作,XML 文档的使用会不断增长,就是说在互联网上交互商业文档。