Abstract. Large information spaces and complex functionality of contemporary systems together with the advent of the Semantic Web are big challenges for the design of simple yet powerful user interfaces. The complex nature of systems thus requires the use of several presentation, personalization and user modeling methods and techniques to address the growing needs and requirements of both users and systems. We present a design of an architecture for the personalized presentation layer of a webbased information system that employs a set of interconnected software components implemented as autonomous software tools for presentation, personalization and user modeling to support features such as navigation support and different views on the presented data, acquisition and evaluation of user characteristics and user adaptation and personalization. The feasibility of our design is evaluated by its realization in the labor market application domain. 1

Abstract. Distributed replication of databases underlying web information systems is a viable way to solve problems of responsiveness and fault tolerance. We describe the middleware platform DIWISA for transparent object-oriented development of distributed web information systems. Support for distributed replication of information as well as fault tolerance and error recovery of web information systems is innovative: protocols which suit the given application best can be plugged in. 1

Requirement engineering (RE) is emerging as an increasingly important discipline for supporting Web application development, as these are designed to satisfy diverse stakeholder needs, additional functional, information, multimedia and usability requirements as compared to traditional software applications. Moreover, when considering innovative e-commerce applications, value-based RE is an extremely relevant methodology which exploits the concept of economic value during the RE activity. In contrast, most of the methodologies proposed for the development of Web applications, primarily focus on the system design, and paying less attention to the RE, and specifically to value-based RE. Focusing this aspect, the paper presents integration of valuebased RE models to WebML models using our recently proposed VIP Business Modeling Framework [1]. We also analyze the framework’s potential in linking other modeling approaches, and argue about its significant integration potential with various E-R/OO-based, process aware Web modeling approaches. Categories and Subject Descriptors D.2.2 [Software Engineering]: Design tools and techniques – object-oriented design methods; H.1.0 [Information Systems]: models and principles – general.

Abstract We discuss the need to extend general models and systems for context-awareness to include adaptation of interactions to context. Our approach was motivated by our experiences of developing mobile applications based on novel modes of interaction. We describe how we were able to support context-aware interactions using an object-oriented framework that we had already developed to support context-aware web applications. 1

Various adaptive hypermedia systems have been proposed to alleviate information overload on the Web by personalising the delivery of information and resources to the user. These systems have however been afflicted with difficulties in the acquisition of an accurate user model, a limited degree of customization offered to the user as well as general lack of user control on and transparency of the systems' adaptive behavior. In this paper, we argue that the use of rules on top on ontologies can enable adaptive functionality that is transparent and controllable for users. To this end, we present ODAS, a domain ontology for adaptive hypermedia systems, and a model for the specification of ODAS-based adaptation rules. We demonstrate the use of this model by showing how it can be instantiated within a knowledge portal to arrive at rules that exploit ODAS semantics to perform meaningful personalization.

Efektívna práca s veľkým otvoreným informačným priestorom prináša so sebou viacero problémov v podobe veľkej časovej náročnosti vyhľadania výsledkov a náročnosti formulácie dopytov so sémantikou. K problémom navigácie patria vysoká miera rekurzie, stratenie sa používateľov a neprívetivosť webových sídel. Práca obsahuje analýzu aktuálnych prístupov k riešeniu uvedených problémov, ku ktorým patria rozdielne spôsoby navigácie v informačnom priestore, adaptívne (webové) systémy a fazetové prehliadače. V práci opisujeme návrh metódy personalizovanej navigácie v informačnom priestore opísanom ontológiou s využitím fazetového prehliadača a adaptívnej navigácie. Navrhnutá metóda využíva sémantiku údajov, uložených v doménovej ontológii a ontológii používateľa, na prispôsobovanie navigácie vo fazetovom prehliadači. Hlavné prínosy metódy sú rozšírenie fazetového prehliadača o pokročilý režim tvorby dopytov, dynamické generovanie faziet z doménovej ontológie. Ďalším prínosom je adaptácia a anotácia faziet a výsledkov vyhľadávania s využitím porovnania podobnosti konceptov v ontológii domény a používateľa. Overenie vybraných častí navrhnutej metódy sme realizovali ich implementáciou v podobe