Relationship Abstractions for an Effective Hypertext Design: Augmentation and Globalization

ions for an Effective Hypertext Design: Augmentation and Globalization Yoshinori Hara Arthur M. Keller y Gio Wiederhold z NEC Corporation Advanced Decision Systems and and Stanford University x Stanford University x Stanford University x Abstract Data abstractions, i.e., aggregation and generalization, are useful for representing complex objects effectively. They provide high level semantic constraints as well as extend the capabilities of entity description in the E-R model. However, corresponding concepts of relationship abstraction are not directly available, particularly in hypertext systems. We propose two types of relationship abstractions, augmentation and globalization, aiming at the improvement of relationship design phases. The former is an abstraction which turns information held in relationships into that of attributes for existing entities. The latter is an abstraction which generates global-to-local relationship hierarchies. We show the advantages of these a..

Interactive web-based hypermedia coordination

This paper discusses the interactive coordination of hypermedia documents' components in the world wide web environment, proposing a design space based on discrete events transmission between linked media and on an extension of the concept of spine introduced by the IEEE 1599 standard for music description. The elements of the design space draw from the early hypermedia models the basic concepts of anchor and link, framing them in the world wide web technology, and integrate the user interaction into dynamic media behavior in a coherent and seamless way. The paper describes the components and operations defined in the design space, giving a rationale for them. Several examples are discussed which represent the typical patterns of dynamic media synchronization and user interaction found in current hypermedia applications. Guidelines for the implementation in the standard HTML5/CSS/Javascript environment are also discussed