DEFINITION: Legal Interoperability Agreement ABB is a Contract formalizing governance rules enabling collaboration between digital public services. Source: EIF (https://ec.europa.eu/isa2/sites/isa/files/eif_brochure_final.pdf#page=27) INTEROPERABILITY SALIENCY: IoP Dimension: Governance IoP The Legal Interoperability Agreement ABB is a key interoperability enabler because it supports legal interoperability by enabling the seamless exchange of data, information, and knowledge. EXAMPLES: The following implementation is an example on how this specific Architecture Building Block (ABB) can be instantiated as a Solution Building Block (SBB): RDA-CODATA Agreement that provides the guidelines and principles on the legal interoperability of research data. Source: (http://www.codata.org/uploads/Legal%20Interoperability%20Principles%20and%20Implementation%20Guidelines_Final2.pdf)