Showing papers by "Peter F. Linington published in 1999"
01 Sep 1999
TL;DR: The requirements for defining communities and expressing policies within a UML environment are discussed, ways in which the existing notation might be used in enterprise specification are compared, and some of the implications this would have for system development tools are indicated.
Abstract: The ODP Enterprise Language allows the rules and policies that characterize an organization to be brought together and used to guide the various stages of system design, development and operation. UML is one of the leading notations for system design and is likely to be the basis for a wide range of design tools. However, UML has a comparatively weak set of facilities for supporting the combination of existing, parameterized specifications and, in particular, for defining and managing policies. This paper discusses the requirements for defining communities and expressing policies within a UML environment, compares ways in which the existing notation might be used in enterprise specification, and indicates some of the implications this would have for system development tools.
44 citations
28 Jun 1999
TL;DR: The Reference Model for Open Distributed Processing provides a powerful structure for the support of large federated systems and provide a basis for the enhancement of tools for the development and maintenance of large middleware systems.
Abstract: Since the Reference Model for Open Distributed Processing was completed, work in ISO in this area has concentrated on the definition of a number of supporting standards to add detail to the basic framework. Taken together, these provide a powerful structure for the support of large federated systems and provide a basis for the enhancement of tools for the development and maintenance of large middleware systems.
8 citations
01 Jun 1999
TL;DR: The measurement framework is described and examples of its use to resolve problems and guide policy are given, including that of Janet, the U.K. academic and research network.
Abstract: JANET, the U.K. academic and research network, has, over almost three decades, grown from a small research network to a major national resource with a vastly expanded user base that now expects an appropriate level of service. Performance targets for the network are set in negotiation between the supplier and representatives of the funding bodies; they are documented in a set of service level agreements. Quality of service measurements are needed to monitor adherence to these agreements, to predict future behavior, and to assist in the formulation of strategy. This paper describes the measurement framework and gives examples of its use to resolve problems and guide policy.
3 citations