relation schema meaning in English
关系图, 关系模式
Examples
- The relation schema for storing these xml documents will vary for the two databases
对于这两个数据库，用于存储这些xml文档的关系模式将有所不同。 - Scientific and statistical databases ( ssdb ) have following characters , firstly , relation schema is relatively stable , and each attribute has limited candidate values with high redundancy , secondly , new arrival data only append to the end of current data area and do not change the exist data , thirdly , every relation is made up of plenty of attributes , but majority of queries only relative with less attributes and most queries are read - only queries
科学与统计数据库( scientificandstatisticaldatabase , ssdb )具有如下特点: ( 1 )关系的模式稳定、属性值的值域有限、数据冗余大; ( 2 )新产生的数据只追加到当前数据末尾而不更新已有内容; ( 3 )每个关系都由大量属性组成,但大多数查询只与少数几个属性相关且多为只读操作。 - In the main body of this paper , the database design process is introduced , in which the database relation schema , data integrity and fault recovery are emphasized , and , the communication protocol designed for remote data acquisition is discribed and validated by petri nets , the develop method of client application and resolvent to some problems are also discussed , including the design of communication component , the asynchronous data return , how to dynamically return image to the client navigator in web application etc . finally , an abbreviated evaluation about the finished system is given
在论文的主体部分，论文详细介绍了数据库的设计过程，其中主要涉及到关系模式的规范化、数据完整性和故障恢复设计等，随后，文章设计了一种用于远程数据采集的通信协议，并使用petri网进行了描述和验证，论文也介绍了如何进行客户端应用程序的开发以及一些主要问题的解决，主要包括通信控件的设计、采集数据的异步返回、在web应用程序中如何动态为客户端返回图形等。最后，论文对整个系统做了一个简单的评估。 - This thesis firstly introduces new demands of aerial product logistics support under high - tech war and some defects of traditional logistics support , and puts forward a kind of system model of aerial product logistics support following data - sharing of cals , and emphasizes detm . secondly it sets forth application of step and xml in the ietm , researchs conversion of xml schema and relation schema , and simply researchs mapping of xml and express . afterword , a based - xml framework of info - transfer between different platform are presented , according to this framework , the author establish a archetypal system of helicopter information query system based xml and dbms
本文首先介绍了现代高科技战争条件下对航空产品维修保障的新要求，概述了传统的后勤保障技术的不足，遵循cals的数据共享的理念，提出了航空产品维修保障系统模型，重点研究了交互式电子技术手册；接着分析了step标准和xml技术在制作交互式电子技术手册中的应用，重点研究了肌模式和关系模式之间的相互转换，初步研究了xml和express语言之间的映射关系；然后，提出了基于xml的一种解决航空产品信息跨平台传递的解决方案，给出了该方案的具体实现流程和详细的通讯协议，并开发了基于xul和数据库的某型号直升飞机的信息查询原型系统。