<h1>The Once Only Hub. Collaborate to build the first EU Data Space.</h1>
<p>The Once Only Technical System (OOTS) is the first EU cross-domain data space for secure government-to-government data exchange.</p>
<p>To make OOTS a reality, the European Commission established the Once Only Hub (OOHUB), a space for implementors where they can discover and access all the services provided by the European Commission to implement the Once Only Technical System.</p> | 