Web服务提供了一种方法描述和发布通用的、经过商定的接口，通过WSDL (Web Services Description Language, Web服务描述语言)标记访问数据和应用程序。
Web Services provide a way of describing and publishing a general purpose and agreed interface for accessing data and applications, through the WSDL (Web Services Description Language) notation.
XML 是基于 Standard Generalized Markup Language（标准通用标记语言，SGML）的，后者由 ISO 8879:1986 [ISO 标准]定义。
XML is based on Standard Generalized Markup Language (SGML), defined in ISO 8879:1986 [ISO Standard].
作家和技术人员例行公事般地创作出以 SGML（标准通用标记语言）格式表示的大量产品说明书、规章需求和计算机系统文档。
Writers and technicians routinely produce voluminous product specifications, regulatory requirements, and computer system documentation in SGML (Standard Generalized Markup Language) format.
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