:a computer language that is used to clearly mark and organize the different parts of a document so that it can be read on different computer systems可扩展置标语言,可扩展标记语言(用于标记和组织文本的计算机语言,使文本能被不同的计算机系统读取)
: a markup language with use and design similar to HTML but employing tags defined by the user that can be used to indicate both the logical structure and the display specifications of the coded data