HTML XML XHTML DHTML区别与联系_html/css_WEB-ITnose
（1）HTML
HTML是超文本标记语言
（2）XML
XML是可扩展标识语言,但XML是一种能定义其他语言的语。
XML最初设计的目的是弥补HTML的不足，
以强大的扩展性满足网络信息发布的需要
，后来逐渐用于网络数据的转换和描述。
【比较】XML与HTML的设计区别是：XML是用来存储数据的，重在数据本身。而HTML是用来定义数据的，重在数据的显示模式
（3）XHTML
XHTML可扩展标识语言，实际上是HTML的升级版本
XML数据转换能力强大，完全可以替代HTML，
简单的说，建立XHTML的目的就是实现HTML向XML的过渡。
(4)DHTML
动态HTML，以下称之为DHTML。确切地说，DHTML只是一种制作网页的概念。
DHTML不是一种技术、标准或规范，DHTML只是一种将目前已有的网页技术、语言标准（HTML、CSS、js）整和运用
的整合
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