For the application of present observational data of digital seismology, the article expatiates on the definition, function and signification, component and common format of metadata of digital seismology, and analyzes the close relation between the metadata and digital seismic records. 针对当前数字地震观测资料应用中的实际需要,阐述了数字地震学中元数据的定义、作用、意义、组成部分及其常用格式,分析了元数据与数字地震记录相互间的紧密关系。
It is a protocol of application layer based on CAN protocol. So far, it has been relatively perfect and sound. Especially, it has a good value in the definition of message format, physical type, physical unit and data type. 它是一种基于CAN开发的应用层协议,目前已经比较完善和成熟,尤其在报文格式定义、物理量类型定义、物理单位定义、数据类型定义方面值得借鉴。
The contents are including the logical format of various table file, some important data structure and macro definition. And we also give some flow process diagrams of the API ( Application Program Interface ) of the system. 内容包括系统中各种表文件的存储格式介绍,系统核心数据结构的介绍,系统一些重要的宏定义介绍,并用较大篇幅描述了系统中一些基本API(ApplicationProgramInterface)的算法流程。