Guideline 56. National architecture

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If several national institutions participate in the agreement, they define an architecture covering national exchanges.

The national architecture focuses on the coordination between the liaison agency and the competent institutions in the country, enabling exchanges with cross-border institutions through the international architecture.

Guideline code

ICT_07500

Mechanism

The Responsible Technical Team (RTT) for the national institutions should define a national architecture to connect institutions of the same country to the international social security agreement.
The scope and features of a specific national architecture would strongly depend on the national configuration of competent institutions administering the social security branches covered by the agreement.
The national architecture corresponds to a national hub connected to the international CRS. The main goals of the components in the national architecture are to:

Redirect incoming international requests to the national institutions concerned, possibly generating multiple specific requests for each one;
Generate outgoing international data packages to be sent through the international architecture, using as input requests or replies from the national institutions.

The proposed architecture should be able to maintain a repository of relevant local data as well as replicas of CRS data. This may include logs of transactions, digital certificates, etc.
The national architecture will include a National Exchange System (NES), which may be implemented based on the paradigm of asynchrony message processing:

The implementation of asynchrony message processing may be based on message queues using an appropriate middleware system;
To implement the hub-oriented operations, the NES may have specialized dispatchers to process messages from a cross-border liaison agency and from the competent national institutions;
The NES should maintain an operation log for transactions, notifying the CRS of the new state when any change occurs. Such notification may be made asynchronously if the international agreement allows it to do so.

Parent

C. Social Security Components

Structure

The management should commission the ICT unit and institution’s delegates in the working committee of the agreement to establish, in coordination with the other national institutions, a national architecture.
The main purpose of the national architecture is to coordinate the interaction of several competent institutions in the same country with the country liaison agency, which performs the cross-border exchanges based on the international architecture.
The national architecture should comply with national standards and frameworks for e-government.
The national architecture should be the most compatible possible with the institutional architectures and models recommended in the current set of Guidelines, particularly Section A.2, ICT Management, and Part B, Key Technologies.

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