XML and its derivatives -- especially the XML Schema Definition (XSD) language -- are commonly used to specify the data exchanged between applications and between components within an application.
XML 及其派生技术，特别是 XML 模式定义（XSD）语言，常常可用于指定不同应用程序之间和同一个应用程序的不同组件之间所交换的数据。
The XML DAS always initializes its model by reading and parsing an XML schema definition file (an XSD file) that corresponds to the XML instance document it is going to load.
XML DAS 初始化其模型的方法是：读取和解析与准备载入的 XML 文档对应的 XML 模式定义文件（XSD 文件）。
In this case, the source would be your relational database and the target would be an XML schema definition (XSD) document that contains the structure of the XML document.
在这个示例中，源是您的关系数据库，目标是一个包含XML文档结构的XML模式定义(XSD)文档。
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