DEFINITION: This ABB is a Business Agnostic Identity Management Service which is used to enables the cross-border interoperability of digital identity (eID) systems and the circularity of eIDs in EU member states to increase the efficiency of cross-border digital transactions. Source: https://ec.europa.eu/cefdigital/wiki/display/CEFDIGITAL/eIDAS-Node+Integration+Package INTEROPERABILITY SALIENCY: IoP Dimension: Behavioral IoP The Identity Management Service ABB  is salient for technical interoperability because it provides the functionalities of user authentication.