i-TEL-u: A Query Suggestion Tool for Integrating Heterogeneous Contexts in a Digital Library

This paper presents the design, implementation and evaluation of a query suggestion tool (named i-TEL-u) that allows for the management and the exploitation of different contexts in an integrated way within the same search interface for accessing the contents of The European Library portal\footnote{http://www.theeuropeanlibrary.org/}. i-TEL-u allows users to seamlessly move from one context to another according to their information needs and to the way these needs evolve during the search session. The aim of this tool is to improve the search functionalities of the portal, attract many users and give them easy and effective access\footnote{The work was partially supported by TELplus Targeted Project - eContent\emph{plus} Program of the European Commission (Contract ECP-2006-DILI-510003).}