Listing 6 shows a snippet for a new SQL database system capability, including both the element declaration and type definition.
代码清单6为新的SQL数据库系统功能提供了一个代码片段，包括元素声明与类型定义。
This type definition refers to a unit in the database domain, so you must add the namespace declaration and the import declaration for the database domain from Listing 4 to your XSD.
这种类型定义引用了数据库域之中的单元，所以您必须为数据库域，从代码清单4向xsd添加名字域声明以及导入声明。
This import declaration refers to the namespace of the database domain and the location of the database domain schema file.
该导入声明引用了数据库域名的名字域以及数据库域方案文件的位置。
Listing 4: Import declaration snippet for the database domain.
清单4：为数据库域导入声明代码片段。
The unit declaration for the MySQL database system looks like the code in Listing 2
MySQL数据库系统的单元定义如代码清单 2 所示
The unit declaration for the MySQL database system looks like the code in Listing 2
MySQL数据库系统的单元定义如代码清单 2 所示
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