Abstract
An ontology middleware system is defined, presented, and discussed in this
paper. It includes number of features critical for the implementation of real-world
knowledge management application: versioning, fine-grained access control,
and meta-information. Important part of the research presented is the definition
of proper models for support for each of these aspects. A security model with
three levels of complexity is designed so to support proper management of
the compromise between complexity and efficiency. The system presented is
under development as a part of the On-To-Knowledge project where it is implemented
as extension of the Sesame repository and allows management of knowledge represented
in RDF(S)-based languages, including DAML+OIL. Although the implementation
makes strong commitments to RDF(S), the definitions of the change tracking
and security problems are of general KR importance.
Abstract
One of the most rapidly evolving e-services is e-Learning, that is, the creation
of advanced educational resources that are accessible on-line and, potentially,
offer numerous advantages over the traditional ones like intelligent access,
interoperability between two or more educational resources and adaptation
to the user. The driving force behind the most advanced e-Learning services
that are about to appear is the definition of the various standards about
educational metadata, that is, data describing learning resources, the learner,
assessment results, etc. The internal details of systems that utilize these
metadata are still an open issue since these efforts are primarily dealing
with "what" and not "how". In this position paper, and under the light of
these emerging metadata standards, we outline eLPA, an intelligent agent that
uses a conceptual graph (CG) binding of certain educational metadata together
with CG rules, to serve primarily as a personal memory assistant.
Abstract
The e-COURT project is European project that involves academic, government
and industrial partners. The project aims at developing an integrated system
for the acquisition of audio/video depositions within courtrooms, the ar-chiving
of legal documents, information retrieval and synchronized audio/video/ text
consultation. The University of Amsterdam is mainly responsible for the development
and utilization of (legal) ontologies in this system.
Abstract
This article summarizes the authors’ experience in implementing CGWorld -
a web-based workbench for distributed development of a knowledge base of conceptual
graphs, stored on a central server. The conceptual graph theory is discussed
and the implementation of it in CGWorld is presented.