Search the World's Largest Database of Information Science & Technology Terms & Definitions
InfInfoScipedia LogoScipedia
A Free Service of IGI Global Publishing House
Below please find a list of definitions for the term that
you selected from multiple scholarly research resources.

What is ER (Entity-Relationship) Diagrams

Encyclopedia of Information Science and Technology, Second Edition
The most widely used model to express the database conceptual schema.
Published in Chapter:
A Web-Geographical Information System to Support Territorial Data Integration
V. De Antonellis (Universitá di Brescia, Italy), G. Pozzi (Politecnico di Milano, Italy), F.A. Schreiber (Politecnico di Milano, Italy), L. Tanca (Politecnico di Milano, Italy), and L. Tosi (Comune di Milano, Italy)
DOI: 10.4018/978-1-60566-026-4.ch659
The design of a Web-geographical information system, Web-GIS (Worboys & Duckham, 2004; Zhong Ren & Ming Hsiang, 2003), strongly requires methodological and operational tools for dealing with information distributed in multiple, autonomous and heterogeneous data sources, and a uniform data publishing methodology and policy over Internet Web sites. In this article we describe the experience of the Politecnico di Milano group in the activities of requirement analysis and conceptual design of the DEAFIN Web-GIS (Schreiber et al., 2003), whose objective is to provide a common environment for comparison of information about available vacant industrial sites coming from different regional data sources. Heterogeneity and Web availability requirements have been taken into account in the system architecture design; the system is thus conceived as a federated Web-based information system, apt to manage and provide access to all the regional relevant information in an integrated and complete fashion. Furthermore, since the data available by a given region partner can be both spatial and alphanumeric, a Web-GIS is defined for each regional component system.
Full Text Chapter Download: US $37.50 Add to Cart
eContent Pro Discount Banner
InfoSci OnDemandECP Editorial ServicesAGOSR