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Content archived on 2024-04-16

Integrated Systems Architecture for ODP

Objective

End-users are increasingly indicating a need to move away from a single-vendor central IT system policy and towards multi-supplier distributed systems. This growing market trend offers an opportunity to turn the fragmentation of the European IT industry into a strength by developing a standard generic architecture for such systems, enabling integration and interworking of applications from a wide variety of domains using heterogeneous equipment from multiple vendors.

The existence of an architectural platform for distributed systems will create important opportunities for European suppliers. It can be exploited not only by the major product-supply companies but also by skilled niche-suppliers, enabling them to integrate their products into a wide variety of IT systems and facilitating their ability to produce integrated multi-supplier offerings. By leading in the development of the architecture important advantages are gained, such as an early ability to produce conformant systems.

The ISA project has developed and demonstrated just such a generic architecture for Open Distributed Processing (ODP) in multi-vendor multi-domain heterogeneous systems.

As systems become distributed, the future of IT lies in the ability to achieve integration of computing and telecommunications; the ISA consortium has been structured to include strong representation by companies in both sectors so that each may benefit from the experience and insights of the others, and so that the architecture may cater for the needs of both.

ISA had three important themes: interworking, integration and standardisation. ISA will enable the integration of systems from multiple vendors by creating a set of common architectural constructs for distributed systems and by using these constructs in the development of standards. Achievement of integration has proved by practical demonstrations of heterogeneous applications interworking via the software platform.

The objectives of the ISA project were to:

- develop an architectural reference model for Open Distributed Processing that enable standards to be defined that are common to all application domains
- stimulate the generation of, make contributions to and encourage the adoption of the necessary standards
- demonstrate the practicality of integration and interworking using the architecture and associated standards
- provide a focus of expertise in ODP.
The integrated systems architecture (ISA) project is developing and demonstrating a generic architecture for open distributed processing (ODP) in multivendor multidomain heterogeneous systems. As systems become distributed, the future of information technology (IT) lies in the ability to achieve integration of computing and telecommunications.

The objectives of the ISA project are to:
develop an architectural reference model for ODP that will define standards;
stimulate the generation of, make contributions to an encourage the adoption of the necessary standards;
demonstrate the practicality of integration and interworking using the architecture and associated standards;
provide a focus of expertise in ODP.

Different applications will require appropriate levels of functionality from the architecture and an ability to optimize it for a particular domain and emphasize suitable quality attributes. Multimedia aspects, both in distribution and computation, have a key role in ISA, as has the ability to scale upwards to multicountry distributed systems and the need for federated management.
The project focuses on the architecture, interfaces, platforms and standards and on transferring the technology into demonstrators within product development divisions in the partner companies. The major deliverables from the ISA project will be:
the architecture, known as ANSA;
manuals for reference, architecture design, programming and users;
standards for the architecture and ODP;
a software suite consisting of the architectural platform and the necessary tools;
demonstrations of key feautures of the architecture;
the transfer of the technology to the project partnrs and other projects.
The architecture places important emphasis upon "evolution not revolution", so that existing systems may be encapsulated and incorporated; it must incorporate existing programming languages and many different operating systems and infrastructures while at the same time making proper provision for future developments. In order to provide a common focus the project has established a "core laboratory" in Cambridge, where staff from partners' companies meet and work together.

Different applications (for example, office, CIM, CAD, telecommunications, network management, corporate information systems) require appropriate levels of functionality from the architecture and an ability to optimise it for a particular domain and emphasise suitable quality attributes, such as response time, throughput, security and robustness. This requires an approach which pays careful attention, for example, to corporate goals and managerial issues, enabling their requirements to be described by means of viewpoints or projections of the architecture. Multi-media aspects, both in distribution and computation, have a key role in ISA, as has the ability to scale upwards to multi-country distributed systems and the need for federated management.

The project focuses on the architecture, interfaces, platforms and standards and on transferring the technology into demonstrators within product development divisions in the partner companies. The major deliverables from the ISA project were:

- the architecture, known as ANSA
- reference, architect, designer, programmer and user manuals
- standards for the architecture and ODP
- a software suite consisting of the architectural platform and the necessary tools
- demonstrations of key features of the architecture
- the transfer of the technology to the project partners and other projects.

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Coordinator

BNR Europe Ltd
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London Road
CM17 9NA Harlow
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Participants (21)