<h2>Architectural design of the Once-Only Technical System</h2>
<p class="lead">The Once-Only Technical System (OOTS) is a technical framework for data sharing. Citizens and businesses will be able to request official documents (known as “evidence”) to complete administrative procedures (allowing people to study, work, live and retire in other EU countries). The decentralised architecture connects public authorities, so they can exchange evidences (official documents and) data at the citizen's request. </p>
<p class="lead">The citizen or business is identified and, having actively confirmed that they wish to use the Once-Only Technical System should be used, is shown a list of the types of document that are possible to be retrieved directly from data sources abroad. The citizen will then select which documents they wish to retrieve from the data sources.</p> | 