毕业设计论文-逻辑数据库设计 外文翻译.doc

外文原文 In many organizations, database development from the beginning of enterprise data modeling, data modeling enterprises determine the scope of the database and the general content. This step usually occurs in an organizations information system planning process, it aims to help organizations create an overall data description or explanation, and not the design of a specific database. A specific database for one or more information systems provide data and the corporate data model (which may involve a number of databases) described by the organization maintaining the scope of the data. Data modeling in the enterprise, you review of the current system, the need to support analysis of the nature of the business areas, the need for further description of the abstract data, and planning one or more database development project. Figure 1 shows Pine Valley furniture companys enterprise data model of a part. 1.1 Information System Architecture As shown in figure 1, senior data model is only general information system architecture (ISA) or a part of an organizations information system blueprint. In the information system planning, you can build an enterprise data model as a whole information system architecture part. According to Zachman (1987), Sowa and Zachman (1992) views of an information system architecture consists of the following six key components: Data (Figure 1 shows, but there are other methods that). Manipulation of data processing (of a data flow diagram can be used, with the object model methods, or other symbols that). Networks, which organizations and in organizations with its main transmission of data between business partners (it can connect through the network topology map and to demonstrate). People who deal with the implementation of data and information and is the source and receiver (in the process model for the data shows that the sender and the receiver). Implementation of the events and time points (they can use state transition diagram a