DEFINITION: Interoperability Specification ABB is a Business Object being embodied as a document of the highest possible level of granularity on an EIRA SBB, formulated as an agreed normative statement in design terms on a legal, organisational, semantic, or technical attribute of an European Public Service. It can refer to existing standards or specifications Source: ISA2 – EIA Action (https://ec.europa.eu/isa2/eif_en.) INTEROPERABILITY SALIENCY: IoP dimensions: Structural IoP, Behavioral IoP, Governance IoP EXAMPLES: The following implementation is an example on how this specific Architecture Building Block (ABB) can be instantiated as a Solution Building Block (SBB): EW-Shopp’s: With vocabulary we refer to any specification of the terminology to be used to represent information in a domain of interest. Most of vocabularies are defined within specific formal languages used by computer programs, such as XML or RDF. Source:(https://ec.europa.eu/research/participants/documents/downloadPublic?documentIds=080166e5b4c5d61e&appId=PPGMS)