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ＸＭＬ是ＳＧＭＬ（ＳｔａｒｄａｒｄＧｅｎｅｒａｌｉｚｅｄＭａｒｋｕｐＬａｎｇｕａｇｅ，标准广义标记语言）的一个精简的子集。ＳＧＭＬ是用来定义电子表格中如何对文件的结构和内容进行描述的国际标准，标准号为ＩＳＯ－８８７９。设计目的是满足各种不同的页面制作的需
XML is a condensed subset of SGML (Stdard Generalized Markup Language). SGML is an international standard used to define how electronic documents describe the structure and content of documents. The standard is ISO-8879. Designed to meet a variety of different page production needs