Schengen Information System II (SIS II)

The second generation of SIS, which went live in April 2015. It is comprised of a central system, Schengen States’ national systems, and a communication infrastructure between the central and the national systems. The UK connected to this system on 13 April 2015 (but only participates in the law enforcement aspects). SIS II includes more functionalities than SIS, including EAW attached directly to the alert for persons, wanted for arrest for surrender or extradition, enhanced alerts on persons and objects, direct enquiries in the central system, biometric data, and information on misused identity. A European Commission summary of SIS II is available here.