Knowledge map is an important and effective instrument for enterprise knowledge management. A large number of unordered knowledge resources in the enterprises bring about difficulties to the knowledge map construction. It is necessary to construct the enterprise knowledge map from a systematic perspective. Considering influences of individual's cognition on the organizational knowledge structure, this paper introduces social classification into the enterprise context and proposes a three-level architecture for enterprise knowledge map construction, i.e. the individual knowledge tagging, the domain topic selection and the inter-domain association analysis layer. In this architecture, domain serves as the basic unit to display knowledge and their relationships, as well as provides a pragmatic context for knowledge navigation and reuse. Incorporating the above elements, a method is formulated and applied to a real-world case.
The universal adoption of the Internet requires a fine grained access control in the sharing of sensitive resources. However, existing access control mechanisms are inflexible and do not help in alleviating the management task of administrating users* access to resources based on security policies. In this paper, we propose an approach to implement fine-grained access control based on RBAC while considering specific context constraints. The approach is object-dependent and policy-enforced through binding policies to particular object. In the policies, context constraints are incorporated to support separation of duties (SoD). Furthermore, the implement of the approach is described in detail and an application to meet specific access control requirements of comprehensive knowledge management system in an aviation enterprise is presented.
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