注记数据库及其在图书借阅系统中的应用

Annotation database and its application in book borrowing system

关系模型采用自顶向下的设计哲学,即先设计模式,后填充数据,这种设计方法不适用于数据结构不恒定的场景且会过多地限制非专业用户.在移动互联网的背景下,提出了一种称为注记数据库的原型库.该数据库采用自底向上的设计哲学,即先有数据,再通过为数据加注记或关联注记的方式来存储和管理数据之间的关联关系,其遵循的核心原则是以用户和数据为中心,灵活地存储和处理数据且该数据库适用于场景不恒定和用户非专业情形下数据的存储.并辅以学生-借书案例的形式介绍了注记数据库的详细设计;理论上证明,该数据库与关系数据库在查询操作上相互等价.

Relational model adopts top-down design philosophy,whose patterns are designed firstly and then data are filled.This philosophy is not suitable for unstable data structures,and will limit non-professional users too much.In the context of mobile Internet,a prototype library called annotation database is proposed.The system adopts the philosophy the bottom-up design philosophy.Firstly,data are imported,and secondly the association relationship between data is stored and managed by annotation or association annotation.The core principle it follows is to store and process data flexibly focusing on users and data.Thus the database is suitable for the storage of data in the case of unstable scenes and nonprofessional users.Finally,the detailed design of annotation database is introduced in the form of student-borrowing case.And it is proved theoretically that the proposed database is equivalent to relational database in expression.