XML, Extensible Markup Language 1.0. The Fourth Edition

XML (Extensible Markup Language) is the marking language or standard by which the meaning of information can be described in the information. XML is used both as a format for communication between systems and as a format for document storage. XML language is a structural descriptive language that helps to structure large data masses more clearly. (31.8.2011)可扩展标记语言（Extensible Markup Language，XML）是一种可用于描述信息语义的标记语言与标准。XML既可作为系统间通信的格式，也可作为文档存储的格式。作为一种结构化描述语言，XML可帮助更清晰地组织大规模数据集合。(31.8.2011)