دانلود مقاله ترجمه شده یک مدل موقت نسخه بندی شده از شما داده ای شی گرائی

This paper describes in a formal way a data schema model which introduces temporal and versioning schema features in an object-oriented environment. In our model, the schema is time dependent and the histories of the changes which occur on its elements are kept into version hierarchies. A fundamental assumption behind our approach is that a new schema specification should not define a new database, so that previous schema definitions are considered as alternative design specifications, and consequently, existing data can be accessed in a consistent way using any of the defined schemas

Contents

1. INTRODUCTION

2. RELATED WORK

3. TV00 DATA MODEL

3.1. Model Basics

3.2. Database Schema

3.3. Temporal Versioned Basics

4. CLASSES

4.1. Class Definition

4.2. Class Extent

5. SCHEMA

5.1. Schema Consistency.

5.2. Semantics of Modification