Search

This paper presents the KBMS 2.0 Project, a system that is aimed at managing and searching information effectively. The idea is to leverage the information stored in any enterprise to support users during their interactions with the defined portal. The advanced portal has been developed to help users in finding information related to their information needs with the use of a friendly user interface. This task has been done by considering two key aspects: (1) context, and (2) personalization, respectively. Contextual information allows to filter out knowledge not related to users, whereas personalization aspects have been used to support users during their searches by considering user preferences and user activities.

In this work we describe and evaluate an efficient data structure developed to deal with an extension of the XPath language that allows the specification of flexible constraints on both the textual content and the document structure of XML documents. Our approach is based on an inverted file representation of XML documents where both structure and content are taken into account. The proposed approach is described, as well as its implementation, by particularly addressing the problem of offering an efficient evaluation of structure-based flexible constraints

Service contracts represent the agreement between the service provider and potential service consumers to use a specific service under given conditions; for each service multiple service contracts are available. In this paper we investigate a new approach to support the service contract selection by exploiting preferences both explicitly defined by a user and implicitly inferred from his/her context. The core of our approach is the use of multi-constraint queries expressed on punctual values and on textual descriptions. Both semantic-based and information retrieval (IR) techniques are applied. Experimental evaluations show the effectiveness of the proposed approach