DoHyPE: arquitetura de máquina de apresentação voltada à depuração de conteúdo hipermídia

Abstract

Hypermedia content consumption has grown due to recent technological evolution and several emerging interactive resources, making it increasingly attractive. In this way the authoring of hypermedia documents has been increasing. This authoring process consists of several steps, from document creation to validation and tests, and presents several challenges. One of these challenges is in the validation of the hypermedia document that should not be done only by visual inspection of document presentation, but through obtaining information and control of the presentation behavior. Developing hypermedia applications has become increasingly challenging because authoring tools have limited resources for the debugging task. Thus, this work aims to propose an architecture, called DoHyPE, for the presentation engine focused on the development and debugging of these applications. The architecture is agnostic regarding the hypermedia model used by the content author. For this, the architecture is based on events, allowing the communication between its components to be monitored or even synthesized. In addition, communication between components can be performed not only locally but also remotely. This work presents a protocol for the communication between the components of the architecture. In addition, this work presents an instantiation of DoHyPE in two steps. In the first step, the Qt framework is used for the implementation of common tasks in Multimedia Systems, such as the presentation of content by media players. In the second step, that instantiation takes the Nested Context Language (NCL) as the underlying hypermedia model. The final solution allows component modules to be developed and attached to the presentation engine, making it possible to create agents that facilitate the debugging process. A data load analysis on the communication buses usage during the presentation and synchronization of hypermedia documents is also discussed.