Increasingly, effort has been devoted to surveying ontology-related research studies from various aspects. However, no survey is available for the ontology library system. For this reason, we decided to examine existing library systems in this paper. First, we identified the main criteria (management, adaptation, and standardization) for evaluating the functionality of the library systems. Then, based on the further enriched criteria, we surveyed most existing ontology library systems. Finally, we summarized the comparison and proposed various important requirements for structuring ontology library systems. The ontology library systems surveyed include: WebOnto, Ontolingua, DAML Ontology Library System, SHOE, Ontology Server, IEEE Standard Upper Ontology, OntoServer and ONIONS. 1.

. In this paper we present an approach to document enrichment, which consists of associating formal knowledge models to archives of documents, to provide intelligent knowledge retrieval and (possibly) additional knowledge services, beyond what is available using 'standard' information retrieval and search facilities. The approach is ontology-driven, in the sense that the construction of the knowledge model is carried out in a top-down fashion, by populating a given ontology, rather than in a bottom-up fashion, by annotating a particular document. In the paper we give an overview of the approach and discuss its application to the domains of electronic news publishing, scholarly discourse and medical guidelines. 1. INTRODUCTION An important activity in knowledge management is "to convert text to knowledge" (O'Leary, 1998). This activity is central to knowledge management for two reasons: i) work practices and information flow in organisations tend to be document-centred and ii)...

This paper presents WebODE as a workbench for ontological engineering that not only allows the collaborative edition of ontologies at the knowledge level, but also provides a scalable architecture for the development of other ontology development tools and ontology-based applications. First, we will describe the knowledge model of WebODE, which has been mainly extracted and improved from the reference model of METHONTOLOGY’s intermediate representations. Later, we will present its architecture, together with the main functionalities of the WebODE ontology editor, such as its import/export service, translation services, ontology browser, inference engine and axiom generator, and some services that have been integrated in the workbench: WebPicker, OntoMerge and the OntoCatalogue.

Metalevel tools can support the knowledge-engineering process by assisting developers in the design and implementation of domain-oriented knowledge-acquisition tools. The use of ontologies as a basis for automatic generation of knowledge-acquisition tools simplifies the tool-specification process by taking advantage of ontologies defined as part of the knowledge-engineering process. One of the drawbacks of this approach is that it separates ontology definition (in ontology editors) from instance editing (in knowledge-acquisition tools). Because many application tasks require ontology definition by domain experts, we have experimented with extending the Protege framework to generate ontology editors in addition to knowledgeacquisition tools for instances. We have explored di#erent approaches to ontology-editor specification in a series of prototype extensions to Protege. Here, metaclass and metaslot definitions are the basis for ontology editors, which can be embedded in know...

The Broker's Lounge is a shell for knowledge structuring and dynamic user interface generation which supports the personalisation of both information structures and user interfaces, emphasising options for context change and multi-dimensional constraint propagation. Two major applications have been developed so far: ELFI, an advisor that manages knowledge about research programs in Germany such that proposers can identify appropriate funding schemes; and MarketMonitor, a tool that helps companies monitor the web pages of competitors, suppliers, and customers for early detection of changes in the market situation.

The realization that KM is primarily a management science and not a computer science implies a different role for technology in KM. This role is

Adaptation/personalization is one of the main issues for web applications and require large repositories. Creating adaptive web applications from these repositories requires to have methods to facilitate web application creation and management and to ensure reuse, sharing and exchange of data through the internet/intranet. Virtual documents deal with these issues. In our framework, we are interested in adaptive virtual documents for author-oriented web applications providing several reading strategies to readers. These applications have the following characteristics: authors have know-how which enables them to choose document contents and to organize them in one or more consistent ways. A reading strategy and the corresponding content are semantically coherent and convey a particular meaning to the readers. Such author's know-how can be represented at knowledge level and then be used for generating web documents dynamically, for ensuring reader comprehension and for sharing and reuse. Then an adaptive virtual document can be computed on the fly by means of a semantic composition engine using: i) an overall document structure -- for instance a narrative structure - representing a reading strategy for which node contents are linked at run time, according to user's needs for adaptation, ii) an intelligent search engine and semantic metadata relying on semantic web initiative, and iv) a user model. In this paper, we focus on a semantic composition engine enabling us to compute on the fly adaptive/personalized web documents in the ICCARS project. Its main goal is to assist the journalist in building adaptive special reports. In such a framework, adaptation, personalization and reusability are central issues for delivering adaptive special reports.

The word "ontology" has gained a good popularity within the AI community. Ontology is usually viewed as a high-level description consisting of concepts that organize the upper parts of the knowledge base.

The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. Weatherley, John (M.S., Computer Science) Adapting Educational Resources for Collaborative On-Line Peer Review

Abstract: Ontology editors are software tools that allow the creation and maintenance of ontologies through a graphical user interface. As the Semantic Web effort grows, a larger community of users for this kind of tools is expected. New users include people not specifically skilled in the use of ontology formalisms. In consequence, the usability of ontology editors can be viewed as a key adoption precondition for Semantic Web technologies. In this paper, the usability evaluation of several representative ontology editors is described. This evaluation is carried out by combining a heuristic pre-assessment and a subsequent user-testing phase. The target population comprises people with no specific ontology-creation skills that have a general knowledge about domain modelling. The problems found point out that, for this kind of users, current editors are adequate for the creation and maintenance of simple ontologies, but also that there is room for improvement, especially in browsing mechanisms, help systems and visualization metaphors.