An Extended Entity-Relationship Approach to Data Management in Object-Oriented Systems

نویسنده

  • Moira C. Norrie
چکیده

Database programming in object-oriented systems can be supported by combining data modelling and programming technologies such that a data model supports the management of collections of objects where those objects are as specified by the underlying object-oriented programming language. This approach is the basis of the object data management services (ODMS) of the Comandos system. The ODMS data model provides constructs for the representation of both entities and their relationships and further supports rich classification structures. To complement the structural model, there is an operational model based on an algebra over collections of objects.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

ERC+: an object+relationship paradigm for database applications

The concepts of object oriented data models aim towards modeling of application objects close to the user's view. Yet developers of applications relying on object oriented database management systems are facing problems resulting from the limitations of object oriented data models to describe adequately the full range of possible associations between objects and between processes. This paper fo...

متن کامل

Interface Based on theEntity - Relationship

This paper presents a database interface for C++ that provides an adequate and uniform coupling to diierent kinds of database management systems. An extended Entity-Relationship approach which is married to object-oriented features is used to provide a common modelling basis. The concepts of the data model are directly reeected by the interface thereby providing an abstract view of data even in...

متن کامل

ساختار دهی آنی داده‌‌های مکانی ورودی GIS با تأکید بر عارضه راه

An important issue in implementation of a GIS system is preparation of data to be entered in GIS. To produce spatial data for GIS using photogrammetric techniques, conventional method is to apply photogrammetric and GIS systems individually (off-line procedure). This approach is costly, time consuming and somehow unreliable due to the fact that 3D photogrammetric model is not available at the ...

متن کامل

Declarative Semantics in Object-Oriented Software Development - A Taxonomy and Survey

One of the modern paradigms to develop an application is object oriented analysis and design. In this paradigm, there are several objects and each object plays some specific roles in applications. In an application, we must distinguish between procedural semantics and declarative semantics for their implementation in a specific programming language. For the procedural semantics, we can write a ...

متن کامل

Stepwise Re-Engineering and Development of Object-Oriented Database Schemata

We present a general approach for re-engineering of object-oriented database schemata. The approach consists of four dependent steps: (1) description of the data within the underlying basic data format, (2) application of a powerful semantic data model in order to construct a semantic database schema, (3) translation of the achieved schema into a general object model, and (4) implementation of ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1993