Ontology-Based User Modeling for Knowledge Management Systems

Abstract

This paper is presenting a generic ontology-based user modeling architecture, (OntobUM), applied in the context of a Knowledge Management System (KMS). Due to their powerful knowledge representation formalism and associated inference mechanisms, ontology-based systems are emerging as a natural choice for the next generation of KMSs operating in organizational, interorganizational as well as community contexts. User models, often addressed as user profiles, have been included in KMSs mainly as simple ways of capturing the user preferences and/or competencies. We extend this view by including other characteristics of the users relevant in the KM context and we explain the reason for doing this. The proposed user modeling system relies on a user ontology, using Semantic Web technologies, based on the IMS LIP specifications, and it is integrated in an ontology-based KMS called Ontologging. We are presenting a generic framework for implicit and explicit ontology-based user modeling.

Ontological user modelling and semantic rule-based reasoning for personalisation of Help-On-Demand services in pervasive environments

“…This architecture was successfully used to enable sensors, devices and agents to share contextual knowledge and to provide relevant information to users based on their contextual needs. Razmerita et al [24] presented work on user modelling with a generic ontology-based architecture called OntobUM.…”

An LDAP-based User Modeling Server and its Evaluation

“…They may also speed up the development of user modeling servers in general. Likewise, ease of extensibility is also crucial since there currently exists no generally accepted user model ontology yet (see PAPI 2001;Razmerita et al 2003;Heckmann et al 2005 for rudimentary beginnings though). When comparing LDAP with current database systems, LDAP clearly possesses far more predefined types of user information and methods for extending them.…”

Requirements for Personal Information Agents in the Semantic Web

“…Information about users should be reusable for different applications and domains so that users do not have to enter their information such as Email addresses or interests again and again. Thereby, an ontology-based approach might be useful [5]. So far there is no widely accepted "user profile ontology" and a mapping of different personalization ontologies is required in real world scenarios.…”