嵌套有序集及其在数据建模中的应用
Nested Ordered Sets and their Use for Data Modelling
摘要：
在本文中，我们提出了一种新的数据建模方法，称为面向概念的模型（CoM），并描述其主要功能和特点，包括数据语义和操作。该模型的显着特点是，它是基于嵌套有序集的形式主义，其中任何元素同时参与两个结构：层次（嵌套）和多维（有序）。模型的一个元素被假定由两部分组成，称为身份和实体，整个方法可以自然地分为两个分支：身份建模和实体建模。我们还提出了一种新的查询语言的主要结构，称为概念，定义为一对两个类：身份类和实体类。我们描述了它的投影，反投影和产品的操作可以用来解决典型的数据建模任务。
英文摘要：
In this paper we present a new approach to data modelling, called the concept-oriented model (CoM), and describe its main features and characteristics including data semantics and operations. The distinguishing feature of this model is that it is based on the formalism of nested ordered sets where any element participates in two structures simultaneously: hierarchical (nested) and multi-dimensional (ordered). An element of the model is postulated to consist of two parts, called identity and entity, and the whole approach can be naturally broken into two branches: identity modelling and entity modelling. We also propose a new query language with the main construct, called concept, defined as a pair of two classes: identity class and entity class. We describe how its operations of projection, de-projection and product can be used to solve typical data modelling tasks.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
