The PALIO Framework for Adaptive Information Services [chapter]

Constantine Stephanidis, Alexandros Paramythis, Vasilios Zarikas, Anthony Savidis
2005 Multiple User Interfaces  
This chapter describes the PALIO (Personalised Access to Local Information and services for tourists) service framework, focusing on its extensive support for service adaptation. The PALIO framework is currently used in the development of location-aware information systems for tourists, and is capable of delivering fully adaptive information to a wide range of devices, including mobile ones. Its open and expandable architecture can integrate a variety of pre-existing and forthcoming services,
more » ... d retrieve information from a collection of different databases. The framework supports dynamic adaptation both in the content and the presentation of information, according to user-and interaction contextcharacteristics. This chapter discusses how the aforementioned adaptation capabilities can support the creation of Multiple User Interfaces (MUIs) on the Web. The PALIO project 1 addresses the issue of universal access to community-wide services, based on content and UI adaptation beyond desktop access. The main challenge of the PALIO project is the creation of an open system for the unconstrained access and retrieval of information (i.e. not limited by space, time, access technology, etc.). Under this scenario, mobile communication systems play an essential role, because they enable access to services from anywhere and at anytime. One important aspect of the PALIO system is the support for a wide range of communication technologies (mobile or wired) to facilitate access to services. The PALIO project is mainly based on the results of three research projects that have preceded it: TIDE-ACCESS, ACTS-AVANTI, and ESPRIT-HIPS. In all of these projects, a primary research target has been the support for alternative incarnations of the interactive part of applications and services, according to user-and usage context-characteristics. As such, these projects are directly related to the concept of Multiple User Interfaces (MUIs), and have addressed several related aspects from both a methodological and an implementation point of view. The ACCESS project 2 developed new technological solutions for supporting the concept of User Interfaces for all (i.e. universal accessibility of computer-based applications). It facilitated the development of UIs adaptable to individual user abilities, skills, requirements, and preferences. The project addressed the need for innovation in this field and proposed a new development methodology called Unified User Interface development. The project also proposed a set of tools enabling designers to deal with problems encountered while attempting to access technology in a consistent, systematic and unified manner (Stephanidis, 2001c, Savidis and. The AVANTI project 3 addressed the interaction requirements of disabled individuals who were using Web-based multimedia applications and services. One of the main objectives of the work undertaken was the design and development of a UI that would provide equitable access and quality in use to all potential end users, including disabled and elderly people. This was achieved by employing adaptability and adaptivity techniques at both the content and the UI levels. A unique characteristic of the AVANTI project was that it addressed adaptation both at the clientside UI, through a dedicated, adaptive Web browser, and at the server side, through presentation and content adaptation Fink, Kobsa and Nill, 1998) . The HIPS project 4 was aimed at developing new interaction paradigms for navigating physical spaces. The objective of the project was to enrich a user's experience of a city by overlapping the
doi:10.1002/0470091703.ch5 fatcat:anaj33ntzvf4zhqmxbpl45g4sq