A temporal object oriented conceptual schema model

2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI:10.1109/PACRIM.2001.953734

B. Pasaya, S. Chittayasothorn

{"title":"A temporal object oriented conceptual schema model","authors":"B. Pasaya, S. Chittayasothorn","doi":"10.1109/PACRIM.2001.953734","DOIUrl":null,"url":null,"abstract":"NIAM is a fact-based conceptual schema model. It was primarily designed as a data model with a formal natural language. However, it is now a popular relational database design tool. NIAM shows clear distinction between the concept of objects and labels. Each entity type must have a unique identifier. So, it is suitable to be mapped to relational database schemas since it is based on the external identifier concept such as the primary keys. Nowadays, object-oriented databases popularity has increased. It is suitable for the representation of complex objects without external identifiers. This ability also makes it suitable for the representation of temporal data. Valid time and transaction time can be attached to attributes without any changes to the identifiers and time normalization which is required if the relational database model is used. This paper presents OONIAM, an extension to NIAM that supports the concepts of complex objects and temporal databases. The concepts of methods, main schemas and sub schemas are also introduced. A set of transformation steps from an OONIAM schema to object database schema is provided.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PACRIM.2001.953734","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 3

Abstract

NIAM is a fact-based conceptual schema model. It was primarily designed as a data model with a formal natural language. However, it is now a popular relational database design tool. NIAM shows clear distinction between the concept of objects and labels. Each entity type must have a unique identifier. So, it is suitable to be mapped to relational database schemas since it is based on the external identifier concept such as the primary keys. Nowadays, object-oriented databases popularity has increased. It is suitable for the representation of complex objects without external identifiers. This ability also makes it suitable for the representation of temporal data. Valid time and transaction time can be attached to attributes without any changes to the identifiers and time normalization which is required if the relational database model is used. This paper presents OONIAM, an extension to NIAM that supports the concepts of complex objects and temporal databases. The concepts of methods, main schemas and sub schemas are also introduced. A set of transformation steps from an OONIAM schema to object database schema is provided.

查看原文本刊更多论文

一个面向时间对象的概念图式模型

NIAM是一个基于事实的概念模式模型。它主要被设计为具有正式自然语言的数据模型。但是，它现在是一种流行的关系数据库设计工具。NIAM对对象和标签的概念进行了清晰的区分。每个实体类型必须有一个唯一的标识符。因此，它适合映射到关系数据库模式，因为它基于外部标识符概念，如主键。如今，面向对象的数据库越来越受欢迎。它适用于没有外部标识符的复杂对象的表示。这种能力也使得它适合于表示时态数据。可以将有效时间和事务时间附加到属性上，而无需更改标识符和时间规范化，如果使用关系数据库模型，则需要这样做。本文介绍了OONIAM，它是NIAM的一个扩展，支持复杂对象和时态数据库的概念。介绍了方法、主模式和子模式的概念。提供了一组从OONIAM模式到对象数据库模式的转换步骤。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)

自引率

0.00%

发文量