Moreover, the device description technology is analyzed expressly. A DD text is advanced which is based on the DDL language. Then the grammar of DDL language and the details of DD development are described.

• 重点在于,以设备描述文件为切入点,以基于FF的1151压力变送器为实现对象开发了基于DDL语言的设备描述文件,并详细介绍了DDL语言的语法结构以及基于DDL语言平台的设备描述文件的开发细节。